Choice-specific sequences in parietal cortex during a virtual-navigation decision task

Harvey, Coen, Tank · Nature · 2012 · neuroscience · 10.1038/nature10918 · record Harvey2012-choice-specific-sequences-in-parietal-cortex
tag layer · index · concepts · authors · עברית
Where this record's text came from. faceted 2026-08 by reading the locally held text (xml); every evidence string verified as an exact substring of that text before merging. Method is a problem for the controlled vocabulary: the primary technique is two-photon calcium imaging of GCaMP3 in behaving mice, which is not one of the listed method values. 'electrophysiology' was recorded as the nearest listed term, and the quoted evidence is deliberately the paper's own extracellular electrophysiological confirmation rather than the imaging sentence, so the tag and its quote agree. The verbatim imaging sentence, if a finer vocabulary is later adopted, is: "Quotation withheld" Prior work is cited only by number, so relation targets are described. 2026-08-12 and 2026-08-15 schema-0.3 passes: every quote verified as an exact substring of the staged text and anchored at merge time; concept terms verified present; every edge endpoint an existing node.
14 quotations on this page contain a reference number where the paper printed a superscript. This journal style prints citations as raised numerals — parameters12,13 — and the extraction flattened them into the line, so the sentence reads parameters 12 , 13 . The digits are citation markers and not part of what the author wrote. The quotes keep them for the same reason they keep every other extraction fault: a quote is reproduced exactly or it proves nothing.
How to read this page. The article itself is not reproduced here — this paper is not cleared for redistribution, so what follows is the tag layer alone. The evidence sentences are withheld with the article. The table at the foot lists every tag the record carries; each row names the facet it belongs to, and the whose words column says whether the tag records the paper's own wording or the tagger's sentence about the paper. Every tag links to each other paper in the corpus carrying it. The machine-readable edition of the same thing is the TEI file beside this one, where the tags live in standOff, and the article is at its publisher via the link below. When we have changed our mind. Some entries in the table begin with a word in capitals and the reason for it. EVIDENCE CORRECTED — the finding still stands, but we had quoted the wrong sentence from the paper, and the quotation has been replaced with the right one. RETRACTED — the entry itself was wrong; it stays on the page, marked, with the reason, rather than being deleted. WITHDRAWN AND REPLACED — the entry was wrong, and a corrected version of it appears in the entries below. Each mark carries its own reason, in brackets, because the reasons differ from one entry to the next. An entry we have WITHDRAWN is removed from this page and kept in the record, with its reason. A line reading Audit and a date is a later re-reading of the entry against its whole sentence: DOUBTFUL means it was kept, and the reason says what is loose about it. Quotation marks inside the tagger's sentence. Where a tag is the tagger's own sentence, a phrase in quotation marks inside it is borrowed from the paper — the tagger's wording around it is not. The paper's own sentence is the evidence quote for that row; on this page it is withheld with the article, and the article is at its publisher. Nothing inside quotation marks anywhere on this page is ours: if it is quoted, it is the paper's. Whose words a concept carries. A concept entry records a term the paper itself uses, so the term, the sense given for it, and its evidence are the paper's own words, quoted where the paper fixes them. This is the opposite of a sense entry in the tag table, which is the tagger's sentence about how the paper uses a term. Where a concept entry could not be grounded in the paper's words, the entry says so on its own row.
Other fields define these differently the same word, defined another way in another discipline
principal component analysis 5 fields · working memory 4 fields

Tags on this paper

Every tag the record carries, each linking to every other paper in the corpus that carries it. A tag appears here whether or not its words occur in the article — the spans below are only the ones a sentence in this paper licenses. Of the 17 concept tags on this paper, none is grounded in a quoted sentence. All carry the tagger's gloss of what the term means in this paper, which is not something the article can license.
posterior parietal cortex PPC sequence of neuronal activation sustained firing rate changes low-dimensional high-dimensional recurrent attractor network models neuronal circuit trajectory choice-specific cells task-modulated cells muscimol GCaMP3 virtual T-maze place cells functional columns center-of-mass principal component analysis A decision is reached when the evolving activity sequence intersects one of the choice-specific trajectories in population state space Growing state-space separation between the two choice trajectories over the trial progressively raises the barrier to reversing a decision The parietal cortex switches between sustained-activity and sequence-based dynamical regimes according to the spatiotemporal demands of the behavioral task choice-specific sequence working memory state space task-modulated microcircuit delay period liquid state machines motifs activity state of the circuit t COM trajectory selectivity index low-dimensional dynamics PPC inactivation neuronal activity anatomical distance trial-type selectivity t-test principal component analysis (PCA) correlation Pearson’s correlations rank correlation Spearman’s correlation Kolmogorov-Smirnov test KS test multiple regression multiple regression analysis factor analysis / dimensionality reduction factor analysis for dimensionality reduction classifier (decoding accuracy) a classifier based on the distance from an individual trial trajectory shuffle / permutation control shuffled versions of the dataset Spearman's correlation of pair difference against distance shuffled dataset control multiple regression on running parameters electrophysiology

Legend

second readingalternativesan independent re-reading of a facet, recorded whether or not it agrees
relation to other workclaim_relationshow this paper stands to another: agrees, contradicts, extends, qualifies
claim typeclaim_typethe shape of the claim: existence, mechanism, method, critique, prediction, null
concept edgeconcept_edgesan asserted relation between two concepts, with the sentence asserting it
content tagcontent_tagsa finding, definition, quantity, statistic or variable named in the paper
contributioncontributionwhat the paper claims to add
controlcontrolsan experiment run to eliminate a rival explanation
limitationlimitationswhat the paper says its evidence cannot support
mechanismmechanismshow the reported effect is said to come about
methodmethodhow the paper produced its evidence
object of studyobject_of_studywhat the paper is about — the thing it investigates
phenomenonphenomenonthe effect or regularity under study
research questionresearch_questionthe question the paper sets itself
sensesensesa distinct use of a term, quoted where the paper fixes it
transfertransfersa method or concept carried in from another field

The paper

The full text is not reproduced here. This article is not cleared for redistribution, so the page carries the tag layer only. Its evidence sentences are withheld; the grounding status remains with each tag, and the article itself is at https://doi.org/10.1038/nature10918. The reading view exists for the papers whose licence permits it.

Every tag on this page

alternatives 3 · claim_relations 10 · claim_type 1 · concept_edges 3 · content_tags 61 · contribution 1 · controls 1 · limitations 9 · mechanisms 10 · method 1 · object_of_study 1 · phenomenon 1 · research_question 1 · senses 5 · transfers 2

Relations on this page carry a quotation for the claim. Where a relation was separately evidenced — and so tested against the vocabulary for its type — the row says so; none of 3 relations here carry that mark. The rest are the tagger’s reading of the sentence quoted beside them.

facettagfieldconf.whose words
object_of_studythe temporal and anatomical structure of population activity in mouse posterior parietal cortex during a memory-guided choice
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
object_of_studythe paper's words
research_questionwhether PPC dynamics are better described as classes of cells with sustained activity or as high-dimensional sequences
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
research_questionthe paper's words
contributionshows choice-specific sequences spanning the whole trial, implemented by cells anatomically intermixed below 100 microns, and argues this replaces the stable-state account
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
contributionthe paper's words
claim_typeexistence
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
claim_typethe paper's words
phenomenonchoice-specific neuronal sequences in posterior parietal cortex
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
phenomenonthe paper's words
methodelectrophysiology
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
methodthe paper's words
mechanismsmechanisms
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[0]the tagger's words
mechanismsmechanisms
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[1]the tagger's words
mechanismsmechanisms
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[2]the tagger's words
mechanismsinformation moves from one neuronal population to another across the trial, each cell active for only a fraction of it
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[3]1.0the tagger's words
mechanismsa proposed framework: the sequence starts choice-independent, then moves toward one choice-specific trajectory, and the growing state-space distance between trajectories acts as a barrier to changing the decision
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[4]0.9the tagger's words
mechanismschoice can be decoded from about 65 neurons within 250 microns, above chance in cue, delay and turn periods
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[5]1.0the tagger's words
mechanismsfunctionally distinct subnetworks are anatomically interlaced, implying highly specific synaptic connectivity rather than spatial clustering
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[6]1.0the tagger's words
mechanismsthe mouse PPC is located first by retrograde and anterograde labelling, since the region had not been characterised in this species
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[7]1.0the tagger's words
mechanismsnecessity established by muscimol inactivation, with a visually-guided version of the task as the control for visual and motor deficits
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[8]1.0the tagger's words
mechanismstrials aligned to cue offset, turn onset and trial end, because running speed and turn position varied across trials and mice
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[9]1.0the tagger's words
limitationsThe task confounds the decision with ongoing navigation, so the decision process itself was not isolated.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
what this limits: every decision-related claim in the paper: OUR BEHAVIORAL PARADIGM DID NOT ISOLATE THE DECISION-MAKING PROCESS
limitations[0]the tagger's words
limitationsWhether the sequences serve decision-related processes remains to be tested.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
what this limits: the functional role of the sequences: SEQUENCES MAY THEREFORE PLAY A ROLE IN SOME ASPECT OF DECISION-RELATED PROCESSES, BUT FURTHER EXPERIMENTS WILL BE NECESSARY
limitations[1]the tagger's words
limitationsThe weak distance-dependence of pairwise correlation may be an optical artefact rather than real spatial organisation.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
what this limits: the spatial-organisation result: the weak distance dependence of pairwise correlation may be an optical artefact rather than real spatial structure
limitations[2]the tagger's words
limitationsThe result may not generalise across PPC regions, layers or species.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
what this limits: the generality of the sequence result: DIFFERENT REGIONS OR LAYERS OF THE PPC MAY HAVE DIFFERING ACTIVITY DYNAMICS, OR THE DYNAMICS OF RODENT AND PRIMATE PPC CIRCUITS MAY DIFFER
limitations[3]the tagger's words
limitationsthe paradigm does not isolate decision-making, so the role of sequences in the decision itself is untested
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
what this limits: any role for the sequences in the decision itself: OUR BEHAVIORAL PARADIGM DID NOT ISOLATE THE DECISION-MAKING PROCESS
limitations[4]1.0the tagger's words
limitationsthe weak distance-correlation relationship may be overlapping fluorescence rather than real spatial organisation, and the paper declines to choose
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
duplicate of: limitations[2] · what this limits: the same scope as limitations[2] - the weak distance-correlation relationship may be overlapping fluorescence rather than real spatial organisation
limitations[5]1.0the tagger's words
limitationsfour rival explanations are offered for why this result differs from the primate literature and none is selected
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
what this limits: the disagreement with the primate literature, which is left unresolved among four alternatives: SEQUENCES ... MAY BE PRESENT IN THE PRIMATE PPC DURING TRADITIONAL TASKS BUT HAVE YET TO BE IDENTIFIED
limitations[6]1.0the tagger's words
limitationsspatial and temporal progression through the task were highly correlated, so what the active cell encodes cannot be separated
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
what this limits: what an active cell in the sequence encodes: NAVIGATION, MEMORY, AND CHOICE INFORMATION MAY BE COMBINED IN THE SEQUENCES, and spatial and temporal progression through the task are highly correlated
limitations[7]0.95the tagger's words
limitationsthe mouse PPC is a stipulated region, defined by projection pattern and position rather than by any functional criterion
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
what this limits: every use of the label 'mouse PPC' and every cross-species comparison built on it: BECAUSE THE LOCATION OF THE MOUSE PPC HAS NOT BEEN CHARACTERIZED, WE FIRST PERFORMED RETROGRADE AND ANTEROGRADE LABELING EXPERIMENTS TO LOCATE IT ANATOMICALLY ... CONSISTENT WITH THE RAT AND PRIMATE PPC
limitations[8]0.9the tagger's words
transfersthe state-space trajectory view of population activity, taken explicitly from work on behavioural choice in the leech nervous system
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
transfers[0]0.9the tagger's words
transfersfeedforward architectures and liquid state machines, offered as possible implementations
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
transfers[1]0.8the tagger's words
controlstwo versions of the virtual T-maze differing ONLY in the cue period and the reward location
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
eliminates: everything the two mazes share - the visual environment, the running, the task structure - leaving the cue and the reward as the only thing a difference in neural activity can be about · outcome (stated by the tagger, no quotation): held
controls[0]0.85the tagger's words
sensessequence here means each neuron active for only a fraction of a task period with different cells active at different times - explicitly opposed to a class of cells sharing one time course
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
senses[0]1.0the tagger's words
senseshigh-dimensional vs low-dimensional is used as the criterion separating the two accounts: low-dimensional means each cell's activity is an amplitude-scaled copy of one prototypical time series
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
senses[1]1.0the tagger's words
sensesdelay cell, cue cell and response cell are treated as possibly artifactual categories - the paper finds the three groups but shows sequences inside each one
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
senses[2]1.0the tagger's words
sensesmouse PPC is a stipulated object: the region was located by its afferents, efferents and position relative to visual and somatosensory cortex, then declared to be PPC
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
senses[3]1.0the tagger's words
sensesneuronal circuit trajectory - the population state as a point in an n-dimensional space with one dimension per neuron
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
senses[4]1.0the tagger's words
alternativesclaim_type: existence
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
a second reading reaching the same value. Recorded: existence — note: a second reading reaching the same value from a different sentence. Not applied - a person decides.
alternatives.claim_typethe tagger's words
alternativesmethod: two-photon imaging of GCaMP3 in layer 2/3 PPC of head-restrained mice navigating a virtual T-maze, with muscimol inactivation and open-loop and linear-track controls
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
a second reading DIFFERING from the recorded value. Recorded: electrophysiology — note: a second reading, verbatim-verified, disagreeing with the value on the record. Not applied - a person decides.
alternatives.methodthe tagger's words
alternativesphenomenon: sequential population dynamics during working memory and decision
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
a second reading DIFFERING from the recorded value. Recorded: choice-specific neuronal sequences in posterior parietal cortex — note: a second reading, verbatim-verified, disagreeing with the value on the record. Not applied - a person decides.
alternatives.phenomenonthe tagger's words
claim_relationsextends → previous work on spatial intermixing of response properties in sensory cortex, motor cortex and hippocampus (refs 12, 31–32)
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
claim_relations[0]the tagger's words
claim_relationscontradicts → models predicting spatial clustering of similar response patterns and connectivity from axonal-dendritic overlap (refs 46–47)
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
differs in: spatial clustering and connectivity rule: the opposing models EMPHASIZED THE SPATIAL CLUSTERING OF SIMILAR RESPONSE PATTERNS, AS IN FUNCTIONAL COLUMNS, AND PROPOSE CONNECTIVITY DEFINED BY AXONAL-DENDRITIC OVERLAP WITHOUT FINE-SCALE SPECIFICITY
claim_relations[1]the tagger's words
claim_relationsbuilds-on → studies identifying cortical sequences of activity states during working memory tasks (refs 27–30)
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
claim_relations[2]the tagger's words
claim_relationsextends → the trajectory account of behavioural choice first developed for the leech nervous system (ref. 37)
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
claim_relations[3]the tagger's words
claim_relationscontradicts → the account of PPC as classes of cells with sustained activity spanning whole task periods
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
differs in: homogeneous classes against sequences: CLASSES OF CELLS WITH HOMOGENEOUS ACTIVITY PATTERNS WERE NOT PRESENT. RATHER, CHOICE-SPECIFIC SEQUENCES OF NEURONS WERE ACTIVATED IN ALL BEHAVIORAL PERIODS
claim_relations[4]1.0the tagger's words
claim_relationscontradicts → models predicting spatial clustering of similar response patterns, as in functional columns
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
differs in: the same parameter as item 1 - spatial clustering, AS IN FUNCTIONAL COLUMNS, against fine-scale specificity
claim_relations[5]1.0the tagger's words
claim_relationsextends → reports of cortical activity sequences during working memory in prefrontal cortex and hippocampus
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
claim_relations[6]1.0the tagger's words
claim_relationsdistinguishes-from → hippocampal place cells, since PPC cells did not encode location on a linear track
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
differs in: THE AXIS IS A SPECIFIC TASK THAT SEPARATES THEM. 'It seems unlikely that PPC neurons only provided location information in A CONTEXT-DEPENDENT MANNER, LIKE HIPPOCAMPAL PLACE CELLS, BECAUSE UNLIKE PLACE CELLS PPC NEURONS DID NOT ENCODE SPATIAL LOCATION DURING A LINEAR TRACK TASK.' The distinction is drawn by a task the alternative account predicts they would pass - so the axis names the experiment that discriminates, not a property of either population.
claim_relations[7]1.0the tagger's words
claim_relationsqualifies → drift-diffusion and recurrent winner-take-all models of decision-making
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
differs in: what the dynamics settle into: DECISIONS ARE REACHED WHEN THE ACTIVITY APPROACHES A CHOICE-SPECIFIC FIXED POINT WITH WORKING MEMORY MAINTAINED AS STABLE ACTIVITY AT THAT POINT, and THE TRAJECTORIES ARE DEFINED BY RELATIVELY HOMOGENEOUS changes - against a sequence
claim_relations[8]1.0the tagger's words
claim_relationsreconciles → the primate literature reporting persistent activity, by proposing the task demands select the dynamics
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
differs in: the task the animal was doing: THE PPC ADOPTS DIFFERENT DYNAMICS DEPENDING ON THE DEMANDS OF THE BEHAVIORAL TASK, which is offered as the explanation for HETEROGENEITY AND SEQUENCES IN OUR EXPERIMENTS VERSUS STEREOTYPY AND LOW-DIMENSIONAL DYNAMICS
claim_relations[9]0.9the tagger's words
concept_edgeslow-dimensional —operationalised-as→ recurrent attractor network models
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
strength of the relation: 0.9 · note: the model is what makes the dimensionality claim testable - each cell an amplitude-scaled copy of one time series Audit 2026-09-28: DOUBTFUL - read against its full span and kept, but low-dimensional dynamics 'CAN BE REPRODUCED in' recurrent attractor models; operationalised-as is loose.
concept_edges[1]1.0the tagger's words
concept_edgeschoice-specific cells —part-of→ task-modulated cells
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
strength of the relation: 1
concept_edges[3]1.0the tagger's words
concept_edgesPPC —distinct-from→ place cells
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
differs in: THE AXIS IS A NEGATIVE TEST USED TO RULE OUT AN ALTERNATIVE. 'It seems unlikely that PPC neurons only provided location information in A CONTEXT-DEPENDENT MANNER, LIKE HIPPOCAMPAL PLACE CELLS, BECAUSE UNLIKE PLACE CELLS PPC NEURONS DID NOT ENCODE SPATIAL LOCATION DURING A LINEAR TRACK TASK.' The comparison is not offered as a finding about PPC - it is offered as the reason a competing interpretation fails, so the axis is what the alternative would have predicted. · strength of the relation: 0.9 · note: argued from a negative result on a linear track, not from a positive dissociation
also in: PPC · place cells
concept_edges[4]1.0the tagger's words
content_tagst-test
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
also in: t-test
content_tags.statistics[0]the tagger's words
content_tagsprincipal component analysis
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.statistics[1]the tagger's words
content_tagscorrelation
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
also in: correlation
content_tags.statistics[2]the tagger's words
content_tagsrank correlation
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.statistics[3]the tagger's words
content_tagsKolmogorov-Smirnov test
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.statistics[4]the tagger's words
content_tagsmultiple regression
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.statistics[5]the tagger's words
content_tagsfactor analysis / dimensionality reduction
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.statistics[6]the tagger's words
content_tagsclassifier (decoding accuracy)
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.statistics[7]the tagger's words
content_tagsshuffle / permutation control
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.statistics[8]the tagger's words
content_tagsSpearman's correlation of pair difference against distance
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.statistics[9]1.0the tagger's words
content_tagsshuffled dataset control
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.statistics[10]1.0the tagger's words
content_tagsmultiple regression on running parameters
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.statistics[11]1.0the tagger's words
content_tagsprincipal component analysis
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.statistics[12]1.0the tagger's words
content_tagsIndividual parietal neurons were each active only briefly, and their brief activations were staggered in time so that the population formed a sequence spanning the whole trial.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[0]the tagger's words
content_tagsDifferent sequences of neurons ran on left- versus right-choice trials, making the sequences choice-specific.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[1]the tagger's words
content_tagsSilencing the posterior parietal cortex with muscimol dropped memory-guided task accuracy to near chance without changing how many trials the mice ran.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[2]the tagger's words
content_tagsThe same inactivation did not significantly affect a visually-guided version of the task.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[3]the tagger's words
content_tagsCells preferring left versus right choices were anatomically intermingled rather than spatially segregated, since pair selectivity difference did not vary with inter-cell distance.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[4]the tagger's words
content_tagsA small, anatomically local population of neurons was enough to decode the animal's upcoming choice above chance throughout the cue, delay and turn periods.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[5]the tagger's words
content_tagsDifferences in the animals' running trajectories between left and right trials could not account for the choice-specific activity.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[6]the tagger's words
content_tagsThe sequential ordering was not an artifact of sorting, because shuffled data produced no comparable sequences.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[7]the tagger's words
content_tagsactivity forms a sequence spanning the entire trial, with cells staggered in time
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[8]1.0the tagger's words
content_tagsdifferent sequences run on left and right choice trials
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[9]1.0the tagger's words
content_tagsthe sequences survive shuffling controls, so they are not an artifact of sorting cells by peak time
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[10]1.0the tagger's words
content_tagscells fall into cue, delay and turn groups, but each group contains a sequence rather than a class
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[11]1.0the tagger's words
content_tagsno classes of cells with homogeneous activity patterns were present
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[12]1.0the tagger's words
content_tagsleft- and right-choice-preferring cells were anatomically intermixed
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[13]1.0the tagger's words
content_tagsmuscimol in PPC drops memory-guided performance to chance without affecting trial rate
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[14]1.0the tagger's words
content_tagsthe same inactivation leaves the visually-guided version of the task intact
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[15]1.0the tagger's words
content_tagsrunning trajectory parameters could not explain the choice-specific activity
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[16]1.0the tagger's words
content_tagspassive viewing and a linear track produced far less location-specific activity than the real task
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[17]1.0the tagger's words
content_tagsindividual trajectories switched between the mean correct left and right choice trajectories, most often during the delay
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[18]1.0the tagger's words
content_tagschoice-specific cells
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.definitions[0]the tagger's words
content_tagsneuronal circuit trajectory
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.definitions[1]the tagger's words
content_tagsactivity state of the circuit
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.definitions[2]the tagger's words
content_tagst COM
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
also in: t COM
content_tags.definitions[3]the tagger's words
content_tagstrajectory selectivity index
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.definitions[4]the tagger's words
content_tagsneuronal circuit trajectory
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.definitions[5]0.85the tagger's words
content_tagslow-dimensional dynamics
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.definitions[6]1.0the tagger's words
content_tagstask-modulated cells
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.definitions[7]1.0the tagger's words
content_tagsPPC inactivation
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.variables[1]the tagger's words
content_tagsneuronal activity
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.variables[2]the tagger's words
content_tagsanatomical distance
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.variables[5]the tagger's words
content_tagstrial-type selectivity
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.variables[6]1.0the tagger's words
content_tagstrajectory selectivity index
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.variables[9]0.9the tagger's words
content_tags83 ± 9% — mean behavioral accuracy of mice on the memory-guided T-maze task
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[0]the tagger's words
content_tags54 ± 5% — fraction of trials correct after bilateral muscimol inactivation of PPC (near the 50% chance level)
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[1]the tagger's words
content_tags~71% — proportion of task-modulated cells that were choice-specific
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[2]the tagger's words
content_tagsn = 404 cells from 6 mice — total number of choice-specific, task-modulated cells pooled across animals
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[3]the tagger's words
content_tags< 100 micrometers — the microcircuit length scale over which functionally distinct cells were anatomically intermixed
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[4]the tagger's words
content_tags63% of error trials, 20% of correct trials — share of trials on which the population trajectory switched selectivity during the delay or late cue period
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[5]the tagger's words
content_tagsQuotation withheld — fraction of neurons with significant location-specific activity increases in each of the three conditions
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[6]the tagger's words
content_tags~65 neurons separated by < 250 µm — size and anatomical spread of the neuronal population sufficient to decode choice above chance
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[7]the tagger's words
content_tags83 plus or minus 9% correct, p < 0.0001 vs 50% — behavioural accuracy
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[8]1.0the tagger's words
content_tagsabout 65 cells per field of view, range 37 to 94 — simultaneous imaging yield
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[9]0.85the tagger's words
content_tagsabout 73% of highly active cells were task-modulated — proportion carrying task signal
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[10]1.0the tagger's words
content_tagsabout 71% of task-modulated cells were choice-specific — proportion distinguishing left from right
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[11]1.0the tagger's words
content_tags11 plus or minus 8% of trial time points with a transient — how briefly each cell is active
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[12]1.0the tagger's words
content_tagssimulated runs 1.3%, linear track 5.8%, T-maze 32.3% — fraction of cells with location-specific activity, the control comparison
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[13]1.0the tagger's words
content_tagscue 5.1 plus or minus 2.6 s, delay 4.2 plus or minus 1.2 s, turn 3.0 plus or minus 1.8 s — task period durations
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[14]0.85the tagger's words
content_tagsEVIDENCE CORRECTED (RE-GROUNDED - THE POINTER WAS WRONG, NOT THE CLAIM) · no injections 87 plus or minus 7%, saline 85 plus or minus 5%, muscimol 54 plus or minus 5% — the inactivation effect
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
EVIDENCE CORRECTED: RE-GROUNDED - THE POINTER WAS WRONG, NOT THE CLAIM. The old evidence was verbatim, anchored and correctly cut, and it contained NONE of this claim's numbers (54, 85, 87). The paper states the claim in one sentence elsewhere and the tagger did not use it. the project, 2026-08-23: 'WE HAVE SPENT THE DAY VERIFYING THAT QUOTES ARE REAL AND NONE OF IT ASKS WHETHER THEY ARE RELEVANT.' Confirmed by reading the claim, the old span and the candidate together; the candidate carries every number AND the claim's own content words.
content_tags.quantities[15]1.0the tagger's words

Interpretive choices

Tags that could not be placed in the text:

What was deliberately not tagged, and why, is recorded per paper by the tagger. Where a paper has no such record, this page says so rather than implying that nothing was declined.

© 2026 Shir Sivroni · ORCID 0009-0000-2597-2824