Auditory Frequency Representations in Human Somatosensory Cortex

Pérez-Bellido, Anne Barnes, Crommett, Yau · Cerebral Cortex (New York, NY) · 2018 · neuroscience · 10.1093/cercor/bhx255 · record P-rez-Bellido2018-auditory-frequency-representations-in-human
tag layer · index · concepts · authors · עברית
Where this record's text came from. faceted 2026-08 by reading the locally held text (html); every evidence string verified as an exact substring of that text before merging. Only ten participants in the main fMRI experiment, but the paper never flags sample size as a limitation, so it is not recorded as one — the three limitations listed are the ones the article states about itself. The paper also runs extensive internal control analyses (ROI erosion at 2/4/10 mm, inaudibility of the tactile stimuli, air-conduction headphone control, visual-cortex negative control) which function as robustness checks rather than as stated limitations. The 'replicates' relation to Beauchamp and Ro (2008) is the article's own statement that its parietal-operculum responses match theirs in magnitude; it is a consistency claim within a new experiment, not a formal replication study. The paper's predictive framing about predictive coding ('This key prediction should be tested in future experiments.') is a proposed future test, not the paper's own contribution shape. 2026-08-13 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.
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Other fields define these differently the same word, defined another way in another discipline
control 43 fields · perception 3 fields · threshold 2 fields · bootstrap 2 fields · confidence interval 2 fields · fMRI 2 fields · and 1 more →

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 29 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.
frequency auditory tactile somatosensory parietal temporal localizer mask voxel ROI erosion partial volume representational similarity dissimilarity perception perceptual BOLD fMRI modality operculum hemisphere visual vibration headphones somatotopic spike timing feedforward threshold control Sounds and vibrations that share frequency content co-occur constantly in everyday experience, and this long history of co-activation builds audio-tactile associations inside frequency-processing circuits Predictive coding: hearing a tone evokes the neural representation of the tactile event usually associated with that tone, producing parietal activity with no mechanical stimulation at all Auditory signals reach parietal cortex over already-documented cortico-cortical and thalamo-cortical routes linking the auditory and somatosensory systems cortical dissimilarity matrix (DM) eroded ROI somatosensory regions auditory regions of interest oddball event frequency content perceived similarity stimulus amplitude Head motion parameters drift parameters general linear model general linear models (GLM) t-test paired t -tests ANOVA one way repeated-measures ANOVA with subject as random factor multiple-comparison correction (false discovery rate) correlation (Pearson) Pearson correlation between each pairwise combination of activity vectors correlation (Spearman rank) calculating Spearman correlations Wilcoxon signed-rank test one-sample non-parametric Wilcoxon signed-rank tests bootstrap confidence interval signal detection sensitivity (d-prime) Dice coefficient (spatial overlap) representational similarity analysis Wilcoxon signed-rank tests Spearman correlation FDR corrected

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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
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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
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sensesensesa distinct use of a term, quoted where the paper fixes it
transfertransfersa method or concept carried in from another field
unrecordable relationunhoused_relationsa relation the paper asserts that this vocabulary cannot express, with the reason

The paper

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alternatives 3 · claim_relations 8 · claim_type 1 · concept_edges 2 · content_tags 85 · contribution 1 · controls 1 · limitations 8 · mechanisms 6 · method 1 · object_of_study 1 · phenomenon 1 · research_question 1 · senses 19 · transfers 4 · unhoused_relations 2

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facettagfieldconf.whose words
object_of_studyauditory frequency representations in classically defined somatosensory cortex - whether responses to a non-preferred modality carry specific information
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object_of_studythe paper's words
research_questionwhether parietal responses to sound are frequency-selective and related to perception, or merely present
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research_questionthe paper's words
contributionfrequency-specific auditory responses in parietal cortex whose representational geometry correlates with offline perceptual similarity judgments, surviving conservative erosion of the parieto-temporal border
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contributionthe paper's words
claim_typeexistence
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claim_typethe paper's words
phenomenonauditory frequency representation in somatosensory cortex
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phenomenonthe paper's words
methodfmri
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also in: fmri
methodthe paper's words
mechanismsmechanisms
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mechanisms[0]the tagger's words
mechanismsmechanisms
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mechanisms[1]the tagger's words
mechanismsmechanisms
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mechanisms[2]the tagger's words
mechanismssubgroups of voxels in classically defined somatosensory regions of the parietal lobe respond to audition and are better suited to represent auditory frequency information
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mechanisms[3]1.0the tagger's words
mechanismswith the proposed route being an extensive history of co-activation at frequencies common to both senses, so that hearing a tone evokes the tactile representation associated with it
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mechanisms[4]0.9the tagger's words
mechanismsand the association may be feature-specific - frequency shared between the senses where stimulus duration appears to rely on modality-dedicated circuits
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mechanisms[5]1.0the tagger's words
limitationsfMRI's temporal resolution cannot say whether the parietal auditory responses are feedforward or feedback.
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what this limits: the direction of the parietal auditory signal: DUE TO THE LIMITED TEMPORAL RESOLUTION OF fMRI, Quotation withheld
limitations[0]the tagger's words
limitationsthe task performed during the discrimination scans, designed to ensure that participants attended to stimulus frequency, did not permit a sensitive analysis of auditory discrimination performance
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what this limits: the analysis the discrimination scans could not support: THE TASK ... DESIGNED TO ENSURE THAT PARTICIPANTS ATTENDED TO STIMULUS FREQUENCY, DID NOT PERMIT A SENSITIVE ANALYSIS
limitations[1]the tagger's words
limitationsthese observations need to be confirmed in ultra-high resolution scanning and single-unit recording experiments testing a more comprehensive range of tones
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what this limits: the whole set of observations: THESE OBSERVATIONS NEED TO BE CONFIRMED IN ULTRA-HIGH RESOLUTION SCANNING AND SINGLE-UNIT RECORDING EXPERIMENTS TESTING A MORE COMPREHENSIVE RANGE OF TONES
limitations[2]the tagger's words
limitationsthe perceptual measure is a group average collected offline from mostly different people, because the in-scanner task was not designed to yield a sensitive discrimination measure
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what this limits: the brain-to-perception comparison: WE COMPARED THE CORTICAL DISSIMILARITY MEASURES TO THE PERCEPTUAL DISSIMILARITY JUDGMENTS TESTED OFFLINE AND AVERAGED across mostly different people
limitations[3]1.0the tagger's words
limitationsauditory frequency representations in bilateral SR eroded are sensitive to ROI size and voxel inclusion criteria, unlike those in AR eroded which are more robust to the same criteria
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what this limits: the SR result specifically: AUDITORY FREQUENCY REPRESENTATIONS IN BILATERAL SR ERODED ARE SENSITIVE TO ROI SIZE AND VOXEL INCLUSION CRITERIA, UNLIKE THOSE IN AR ERODED WHICH ARE MORE ROBUST
limitations[4]1.0the tagger's words
limitationsthe elimination of the cutaneous-activation account rests partly on a comparison whose data are not shown
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what this limits: the cutaneous-activation argument: it rests on a comparison of frequency response profiles whose data are not shown
limitations[5]1.0the tagger's words
limitationsfMRI cannot say whether the parietal auditory responses are feedforward or feedback
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what this limits: the same scope as limitations[0] - feedforward against feedback is not resolvable at this temporal resolution
limitations[6]1.0the tagger's words
limitationsand whether frequency is explicitly tuned, temporally coded or topographically arranged in somatosensory cortex is unknown
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what this limits: any claim that somatosensory cortex represents frequency explicitly: EVIDENCE FOR EXPLICIT FREQUENCY TUNING is lacking, even where spike timing can signal vibration above 100 Hz
limitations[7]1.0the tagger's words
transfersthe cortical DM calculated for each ROI compared to the group perceptual DM, so that a high correlation indicates the representational geometry of the auditory stimuli in the ROI corresponds to the geometry of the stimuli in perceptual space
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transfers[0]1.0the tagger's words
transferspairwise similarity ratings, collected outside the scanner and turned into a dissimilarity matrix
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transfers[1]1.0the tagger's words
transfersthe 100 to 300 Hz range as the band where the two senses overlap, used to predict where parietal responses should stop
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transfers[2]0.9the tagger's words
transferstemporal coding of vibration frequency in somatosensory cortex, named as the mechanism that would explain the fMRI result and has not been shown
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transfers[3]1.0the tagger's words
controlsa +/-5 per cent JITTER added to the loudness-matched amplitude of every stimulus presentation
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eliminates: amplitude as a systematic correlate of frequency - without it, a region that appeared to encode auditory FREQUENCY could be responding to loudness instead, which is the confound the paper's whole claim turns on · outcome: held
controls[0]0.95the tagger's words
unhoused_relationsROI size → statistical relationship
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AN ANALYSIS CHOICE THAT MOVES THE RESULT: significant correlations required between 50 and 200 voxels with the tactile mask, and beyond that, including more voxels WEAKENED the relationship. The correlation is not a fixed property; it depends on where the ROI is cut.
unhoused_relations[0]the tagger's words
unhoused_relationscortical and perceptual DMs → postcentral gyrus
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POSITIVE CORRELATION, RESTRICTED: significant only in the postcentral and supramarginal gyri, and only under the auditory mask. The restriction IS the result - an unscoped edge would assert it across parietal cortex, which the span explicitly denies.
unhoused_relations[1]the tagger's words
sensesTHE REGION'S NAME DOES NOT BOUND WHAT IT PROCESSES: robust and frequency-specific responses to sound in CLASSICALLY DEFINED somatosensory areas, against the traditional notion of modality-dedicated cortical systems
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senses[0]1.0the tagger's words
sensesand the question is sharpened before the measurement - multimodal responses are NO LONGER DISPUTED, but whether they convey SPECIFIC representations and how they relate to perception are the open questions
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senses[1]1.0the tagger's words
senseswith the precise gap named: auditory stimulation was already known to evoke distinct signatures in somatosensory cortex, and it REMAINED UNCLEAR whether those patterns represent specific auditory information
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senses[2]1.0the tagger's words
sensesWHICH LOCALIZER DEFINED THE VOXELS IS ITSELF THE HYPOTHESIS TEST: separate auditory, tactile and audio-tactile masks, used to ask whether parietal voxels PRIVILEGED in their sensitivity to sound are the ones that carry the representation
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senses[3]1.0the tagger's words
sensesAND THE ANSWER DEPENDS ON THE MASK: fewer and smaller regions show a frequency effect with the tactile mask, and the paper reads that difference as the result rather than as noise
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senses[4]1.0the tagger's words
sensesTHE SAME DATA ARE SIGNIFICANT OR NULL BY MASK, ONCE SPLIT BY HEMISPHERE: in the left somatosensory ROI the auditory mask gives r = 0.24 P < 0.05, the tactile mask r = 0.07 P = 0.25 and the audio-tactile mask r = 0.1 P = 0.15
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senses[5]1.0the tagger's words
sensesand the same split against perception - significant correlations ONLY with the auditory masks, with the tactile left-hemisphere mask at P = 0.07
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senses[6]1.0the tagger's words
sensesTHE RESULT EXISTS INSIDE A WINDOW OF ANALYSIS SIZE, AND THE WINDOW DIFFERS BY MASK: the auditory mask needs more than 130 voxels, the tactile mask between 50 and 200 - BEYOND WHICH MORE VOXELS WEAKEN IT - and the audio-tactile mask only 300 to 350
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senses[7]1.0the tagger's words
sensesstated plainly as a limit - the parietal representations are SENSITIVE to ROI size and voxel inclusion criteria where the temporal ones are ROBUST to the same criteria
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senses[8]1.0the tagger's words
sensesA THRESHOLD CHOSEN FOR ITS ROLE IN THE PIPELINE, NOT FOR INFERENCE: a LIBERAL uncorrected P < 0.05 used to build the masks, precisely because they only constrain later tests
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senses[9]1.0the tagger's words
sensesTHE artifact IS ELIMINATED BY A PARAMETRIC SWEEP RATHER THAN ONE CONTROL: ROIs eroded by 2 mm, then 4 mm, then 10 mm - and the auditory-mask result survives all three
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senses[10]1.0the tagger's words
senseswith four separate design decisions listed against the same confound - 2 mm isotropic voxels, no volumetric smoothing, surface-space filtering, and conservative borders
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senses[11]1.0the tagger's words
sensesAND THE SPATIAL ARGUMENT IS TURNED AROUND: the significant parietal subdivisions are NOT the ones closest to auditory cortex, which is what a partial-volume account would have required
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senses[12]1.0the tagger's words
sensesONE CONTROL EXPERIMENT ANSWERING TWO DIFFERENT OBJECTIONS: air-conduction headphones show the effect does not need vibrating earbuds, AND that session involved no touch at all, so a learned sound-vibration association cannot explain it either
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senses[13]1.0the tagger's words
sensesand the earbud account is refuted by SOMATOTOPY - cutaneous drive in the ear canal would confine the response to the ear representation, and the responses are broadly distributed
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senses[14]1.0the tagger's words
sensesA LOAD-BEARING COMPARISON WHOSE EVIDENCE IS NOT IN THE PAPER: tactile stimulation at matched frequencies gave response profiles that 'clearly differed' from the sound profiles - DATA NOT SHOWN
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senses[15]1.0the tagger's words
sensesTWO NEGATIVE CONTROLS, ONE ACROSS REGIONS AND ONE WITHIN: visual cortex patterns do not correlate with the perceptual geometry, and neither do the voxels that DEACTIVATED in the localizer
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senses[16]1.0the tagger's words
sensesTHE TWO SIDES OF THE CORRELATION COME FROM DIFFERENT PEOPLE AND DIFFERENT SESSIONS: the perceptual judgments were collected offline and averaged over subjects, because the in-scanner task could not yield a sensitive discrimination measure
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senses[17]1.0the tagger's words
sensesand the peak sits at the edge of the tested range - the somatosensory profile is bimodal with a peak at 75 Hz, THE LOWEST TESTED FREQUENCY
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senses[18]1.0the tagger's words
alternativesclaim_type: existence
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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: three independent localizer masks - auditory, tactile, audio-tactile - used to select voxels, so that which mask defines the data becomes itself the hypothesis test
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a second reading DIFFERING from the recorded value. Recorded: fmri — note: a second reading, verbatim-verified, disagreeing with the value on the record. Not applied - a person decides.
alternatives.methodthe tagger's words
alternativesphenomenon: temporal frequency processing shared by audition and touch, traditionally described as segregated into separate parietal and temporal systems
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a second reading DIFFERING from the recorded value. Recorded: auditory frequency representation in somatosensory 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 → Liang et al. (2013)
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claim_relations[0]the tagger's words
claim_relationsreplicates → Beauchamp and Ro (2008)
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claim_relations[1]the tagger's words
claim_relationscontradicts → the traditional notion of modality-dedicated cortical systems in which frequency processing is segregated into parietal and temporal streams
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claim_relations[2]1.0the tagger's words
claim_relationssupports → the account that parietal responses to sound reflect auditory processing rather than partial volume contamination, from the erosion sweep
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claim_relations[3]1.0the tagger's words
claim_relationsdistinguishes-from → cutaneous activation by vibrating earbuds, excluded by somatotopy, by frequency profile and by a headphone control experiment
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differs in: THE AXIS IS A NAMED CONFOUND AND THE EQUIPMENT THAT CREATES IT. 'Quotation withheld.' The alternative explanation is a property of the apparatus, not of the brain - so every study using these headphones inherits it, and only this one says so.
claim_relations[4]1.0the tagger's words
claim_relationsexplains-away → the possibility that the effect is a learned association between sounds and vibrations, since the control session involved no tactile stimulation
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claim_relations[5]1.0the tagger's words
claim_relationscritiques → its own perceptual comparison, which is offline, group-averaged and not trial-wise
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differs in: THE AXIS IS THE GRAIN OF THE COMPARISON. 'Quotation withheld.' A brain-behaviour correspondence established between a within-subject neural measure and a between-subject behavioural one is a weaker claim than it reads as - and the paper opens the paragraph with 'admittedly, our approach can be substantially improved'.
claim_relations[6]1.0the tagger's words
claim_relationspredicts → that parietal regions respond only to the low frequency range that is also experienced through touch
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claim_relations[7]1.0the tagger's words
concept_edgessomatotopic —part-of→ parietal
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strength of the relation: 1 Audit 2026-09-28: DOUBTFUL - read against its span and kept, but the span addresses somatotopic parietal responses; part-of is loose.
also in: somatotopic · parietal
concept_edges[25]1.0the tagger's words
concept_edgesspike timing —operationalised-as→ frequency
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strength of the relation: 1 · note: the mechanism that would explain the result and has not been shown - explicit frequency tuning in somatosensory cortex REMAINS ELUSIVE Audit 2026-09-28: DOUBTFUL - read against its span and kept, but the span says somatosensory neurons signal vibration frequency in spike timing; operationalised-as is loose.
concept_edges[39]1.0the tagger's words
content_tagsgeneral linear model
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content_tags.statistics[0]the tagger's words
content_tagst-test
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also in: t-test
content_tags.statistics[1]the tagger's words
content_tagsANOVA
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also in: ANOVA
content_tags.statistics[2]the tagger's words
content_tagsmultiple-comparison correction (false discovery rate)
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content_tags.statistics[3]the tagger's words
content_tagscorrelation (Pearson)
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content_tags.statistics[4]the tagger's words
content_tagscorrelation (Spearman rank)
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content_tags.statistics[5]the tagger's words
content_tagsWilcoxon signed-rank test
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content_tags.statistics[6]the tagger's words
content_tagsbootstrap
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also in: bootstrap
content_tags.statistics[7]the tagger's words
content_tagsconfidence interval
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content_tags.statistics[8]the tagger's words
content_tagssignal detection sensitivity (d-prime)
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content_tags.statistics[9]the tagger's words
content_tagsDice coefficient (spatial overlap)
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content_tags.statistics[10]the tagger's words
content_tagsrepresentational similarity analysis
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content_tags.statistics[11]the tagger's words
content_tagsWilcoxon signed-rank tests
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content_tags.statistics[12]0.9the tagger's words
content_tagsSpearman correlation
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content_tags.statistics[13]1.0the tagger's words
content_tagsFDR corrected
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also in: FDR corrected
content_tags.statistics[14]1.0the tagger's words
content_tagsPure-tone auditory stimulation produced robust, frequency-specific BOLD responses in classically defined somatosensory areas of the parietal lobe, outside the bilateral temporal lobes.
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content_tags.findings[0]the tagger's words
content_tagsMulti-voxel activation patterns for sound pairs in the parietal lobe showed a similarity structure that correlated significantly with participants' perceptual similarity judgments of the same tones.
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content_tags.findings[1]the tagger's words
content_tagsAuditory frequency information is therefore distributed across brain regions traditionally treated as dedicated to touch, not confined to auditory cortex.
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content_tags.findings[2]the tagger's words
content_tagsThe parietal auditory representations are not a partial-volume artifact of the neighbouring temporal lobe: they survived even when the region of interest was eroded by 10 mm from the parieto-temporal border.
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content_tags.findings[3]the tagger's words
content_tagsWithin parietal cortex, significant perceptual-cortical correspondences were found only in the postcentral gyrus and supramarginal gyrus.
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content_tags.findings[4]the tagger's words
content_tagsParietal voxels selected by the auditory localizer carried more robust auditory frequency representations than voxels selected by the tactile or audio-tactile localizers.
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content_tags.findings[5]the tagger's words
content_tagsThe relationship between cortical and perceptual dissimilarity for the tones appears specific to temporal and parietal cortex.
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content_tags.findings[6]the tagger's words
content_tagsThe parietal responses are not driven by the vibrating piezoelectric earbuds mechanically stimulating the ear canal: significant parietal BOLD changes were still obtained with circumaural air-conduction headphones.
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content_tags.findings[7]the tagger's words
content_tagsFrequency tuning profiles differed between the two regions: both peaked around 200 Hz, but the somatosensory region showed a second, bimodal peak at the lowest tested frequency of 75 Hz.
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content_tags.findings[8]the tagger's words
content_tagsrobust and frequency-specific responses to auditory stimulation in CLASSICALLY DEFINED somatosensory areas, against the traditional notion of modality-dedicated cortical systems
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content_tags.findings[9]1.0the tagger's words
content_tagsand the parietal similarity patterns correlated significantly with perceptual similarity judgments made outside the scanner
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content_tags.findings[10]1.0the tagger's words
content_tagsthe question is sharpened first - multimodal responses are NO LONGER DISPUTED, and whether they convey specific representations is the open question
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content_tags.findings[11]1.0the tagger's words
content_tagswith the precise gap named: distinct response signatures were known, and it remained unclear whether they REPRESENT specific auditory information
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content_tags.findings[12]1.0the tagger's words
content_tagsWHICH LOCALIZER DEFINED THE VOXELS IS ITSELF THE HYPOTHESIS TEST - three masks, asking whether the voxels privileged for sound are the ones that carry the representation
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content_tags.findings[13]1.0the tagger's words
content_tagsA THRESHOLD CHOSEN FOR ITS ROLE IN THE PIPELINE: liberal and uncorrected at P < 0.05, because the masks only constrain later tests
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content_tags.findings[14]1.0the tagger's words
content_tagsTHE ANSWER DEPENDS ON THE MASK: the differences in the results acquired with the tactile localizer masks compared to the auditory and audio-tactile masks imply that brain regions preferentially responsive to auditory stimulation were more likely to exhibit significant response modulation related to auditory frequency
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content_tags.findings[15]1.0the tagger's words
content_tagsTHE SAME DATA ARE SIGNIFICANT OR NULL BY MASK once split by hemisphere - left somatosensory ROI: auditory r = 0.24 P < 0.05, tactile r = 0.07 P = 0.25, audio-tactile r = 0.1 P = 0.15
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content_tags.findings[16]1.0the tagger's words
content_tagsand against perception, significant correlations ONLY with the auditory masks, with the tactile left-hemisphere mask at P = 0.07
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content_tags.findings[17]1.0the tagger's words
content_tagsTHE RESULT EXISTS INSIDE A WINDOW OF ANALYSIS SIZE: the auditory mask needs more than 130 voxels, the tactile mask 50 to 200 beyond which MORE VOXELS WEAKEN IT, the audio-tactile mask only 300 to 350
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content_tags.findings[18]1.0the tagger's words
content_tagsstated as a limit - parietal representations are sensitive to ROI size and voxel inclusion criteria where temporal ones are robust to the same criteria
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content_tags.findings[19]1.0the tagger's words
content_tagsTHE artifact IS ELIMINATED BY A PARAMETRIC SWEEP: ROIs eroded by 2 mm, 4 mm and 10 mm, with the auditory-mask result surviving all three
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content_tags.findings[20]1.0the tagger's words
content_tagswith four separate design decisions listed against the same confound - 2 mm isotropic voxels, no volumetric smoothing, surface-space filtering, conservative borders
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content_tags.findings[21]1.0the tagger's words
content_tagsAND THE SPATIAL ARGUMENT IS TURNED AROUND: the significant parietal subdivisions are not the ones closest to auditory cortex, as a partial-volume account would require
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content_tags.findings[22]1.0the tagger's words
content_tagsthe tactile stimuli were confirmed inaudible - chance performance, 0.49, without physical contact with the stimulator
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content_tags.findings[23]1.0the tagger's words
content_tagsand the vibrating-earbud account is refuted by SOMATOTOPY - cutaneous drive in the ear canal would confine the response to the ear representation
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content_tags.findings[24]1.0the tagger's words
content_tagsA LOAD-BEARING COMPARISON WHOSE EVIDENCE IS NOT IN THE PAPER: matched-frequency tactile stimulation gave profiles that clearly differed from the sound profiles, DATA NOT SHOWN
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content_tags.findings[25]1.0the tagger's words
content_tagsONE CONTROL EXPERIMENT ANSWERING TWO OBJECTIONS: air-conduction headphones remove the earbud account, and that session involved no touch, removing the learned-association account
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content_tags.findings[26]1.0the tagger's words
content_tagsTWO NEGATIVE CONTROLS, ACROSS REGIONS AND WITHIN: visual cortex patterns do not correlate with the perceptual geometry
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content_tags.findings[27]1.0the tagger's words
content_tagsand voxels that DEACTIVATED in the localizer carry no relationship to auditory stimulus frequency
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content_tags.findings[28]1.0the tagger's words
content_tagsTHE TWO SIDES COME FROM DIFFERENT SESSIONS - the cortical dissimilarity measures were compared to perceptual dissimilarity judgments tested offline and averaged over subjects, because the discrimination scans did not permit a sensitive analysis of auditory discrimination performance
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content_tags.findings[29]1.0the tagger's words
content_tagssomatosensory ROI dissimilarity against frequency: auditory mask r = 0.40, tactile r = 0.24, audio-tactile r = 0.25, all significant bilaterally
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content_tags.findings[30]1.0the tagger's words
content_tagswith the higher somatosensory dissimilarity attributed to noisier patterns, and temporal patterns called qualitatively more reliable
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content_tags.findings[31]1.0the tagger's words
content_tagsthe somatosensory frequency profile is bimodal with a peak at 75 Hz, THE LOWEST TESTED FREQUENCY
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content_tags.findings[32]1.0the tagger's words
content_tagsand the stimulus set was built to exclude two confounds at once - no harmonically related frequencies, and a 5% jitter on loudness-matched amplitudes
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content_tags.findings[33]1.0the tagger's words
content_tagsthe proposed route is a history of co-activation, with the falsifiable consequence that parietal regions should respond only to the band shared with touch
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content_tags.findings[34]1.0the tagger's words
content_tagsand the association may be FEATURE-SPECIFIC - frequency shared between the senses where stimulus duration appears to rely on modality-dedicated circuits
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content_tags.findings[35]1.0the tagger's words
content_tagsexplicit frequency tuning in somatosensory cortex remains elusive, and whether auditory information is carried there by a temporal code is unknown
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content_tags.findings[36]1.0the tagger's words
content_tagsand fMRI's temporal resolution cannot say whether the parietal auditory responses are feedforward or feedback
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content_tags.findings[37]1.0the tagger's words
content_tagscortical dissimilarity matrix (DM)
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content_tags.definitions[0]the tagger's words
content_tagseroded ROI
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also in: eroded ROI
content_tags.definitions[2]the tagger's words
content_tagssomatosensory regions
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content_tags.definitions[3]the tagger's words
content_tagsauditory regions of interest
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content_tags.definitions[4]the tagger's words
content_tagsoddball event
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also in: oddball event
content_tags.definitions[5]the tagger's words
content_tagsdissimilarity
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also in: dissimilarity
content_tags.definitions[6]1.0the tagger's words
content_tagserosion
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also in: erosion
content_tags.definitions[7]0.9the tagger's words
content_tagspartial volume
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content_tags.definitions[8]0.9the tagger's words
content_tagslocalizer
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also in: localizer
content_tags.definitions[9]1.0the tagger's words
content_tagsfrequency content
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content_tags.variables[0]the tagger's words
content_tagsperceived similarity
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content_tags.variables[3]the tagger's words
content_tagsstimulus amplitude
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content_tags.variables[4]the tagger's words
content_tagsfrequency
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also in: frequency
content_tags.variables[6]1.0the tagger's words
content_tagsdissimilarity
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
also in: dissimilarity
content_tags.variables[7]1.0the tagger's words
content_tagsROI
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also in: ROI
content_tags.variables[8]1.0the tagger's words
content_tagsmask
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also in: mask
content_tags.variables[9]1.0the tagger's words
content_tagsHead motion parameters
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content_tags.variables[10]the tagger's words
content_tagsdrift parameters
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content_tags.variables[11]the tagger's words
content_tagsTen — participants in the main fMRI experiment
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content_tags.quantities[0]the tagger's words
content_tags75, 130, 195, 270, and 355 Hz — the five non-harmonically-related pure tones used as auditory stimuli
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content_tags.quantities[1]the tagger's words
content_tagsmean d ’ = 5.89 — participants' sensitivity in detecting oddball events during the scans
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content_tags.quantities[2]the tagger's words
content_tags37 and 54 clusters — left- and right-hemisphere clusters showing significant auditory responses under the auditory localizer mask
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content_tags.quantities[3]the tagger's words
content_tagsmean r = 0.40, W = 54, P < 0.005 — relationship between frequency distance and activation-pattern dissimilarity in the bilateral somatosensory ROI with the auditory localizer mask
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content_tags.quantities[4]the tagger's words
content_tagsmean r = 0.41, W = 55, P < 0.001 — correlation between the perceptual dissimilarity matrix and the somatosensory-ROI cortical dissimilarity matrix with the auditory mask
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content_tags.quantities[5]the tagger's words
content_tagsmean r = 0.83, W = 21, P < 0.05 — relationship between perceptual similarity ratings and absolute frequency differences between tones
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content_tags.quantities[6]the tagger's words
content_tags0.49 ± 0.012 — chance-level tactile detection rate when subjects had no physical contact with the stimulator, confirming the tactile stimuli were inaudible
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content_tags.quantities[7]the tagger's words
content_tags130 voxels — ROI size the eroded somatosensory region had to exceed before perceptual-cortical correlations reached significance with the auditory mask
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content_tags.quantities[8]the tagger's words
content_tagsr = 0.24 ... r = 0.07 ... r = 0.1 — the same somatosensory data analysed with three different localizer masks - one significant, two not, so the mask decides whether there is a finding
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content_tags.quantities[9]1.0the tagger's words
content_tags130 ... 50 and 200 ... 300–350 — the ROI sizes at which each mask yields a significant brain-perception correlation, with the tactile mask WEAKENING beyond its window - a result that exists only inside an analysis-size range
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content_tags.quantities[10]1.0the tagger's words
content_tags10 mm — the most extreme erosion of the parieto-temporal border at which the auditory-mask result still holds - a parametric sweep on the artifact rather than a single control
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content_tags.quantities[11]1.0the tagger's words
content_tags0.49 — detection of the tactile stimulator without physical contact - chance, which is what licenses treating the vibrations as inaudible
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content_tags.quantities[12]1.0the tagger's words
content_tags75 Hz — the second peak of the somatosensory frequency profile, and also the lowest frequency tested - so the profile's shape is bounded by the design
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content_tags.quantities[13]1.0the tagger's words

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