Working Memory-Related Hippocampal Deactivation Interferes with Long-Term Memory Formation — TEI-tagged view

Axmacher, Elger, Fell · 2009 · neuroscience · doi:10.1523/jneurosci.5277-08.2009 · full text at the source · TEI xml · tagged edition · index · concepts · authors
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. method is recorded as 'fmri' from the controlled list, but the study is genuinely dual-modality: new fMRI data in 19 healthy subjects plus a reanalysis of intracranial EEG (DC potentials) from 8 epilepsy patients with hippocampal depth electrodes - i.e. 'electrophysiology' applies equally. Claim type is 'mechanism' because the contribution is an account of WHY early-list items are forgotten (failure to recruit hippocampus-dependent WM), not merely that a difference exists. Replication status is 'untested' because the article itself reports no independent replication attempt of its own finding. 2026-08-13, 2026-08-15 and 2026-08-25 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.
Other fields define these differently the same word, defined another way in another discipline
working memory 4 fields · statistical-significance 2 fields · fmri 2 fields
Tags on this paper every tag the record carries, whether or not the words occur in the text below — a number is how many papers in the corpus carry that tag; a tag with no number is unique to this paper
working memory27 long-term memory9 primacy recency3 hippocampus29 deactivation DC potentials BOLD5 serial position3 anterior cingulate cortex3 rote strategy Sternberg fmri24

Our tag layer for this paper

Cross-disciplinary analysis
content-tags & facets: phenomenon · claim-type · cross-domain-transfer · mechanism · claim-relation · replication-status · limitation — grounded in the full text
phenomenonworking memory-long-term memory interaction in the hippocampus— “Here, we used two complimentary approaches to investigate whether WM-related activity patterns occur also during LTM encoding of sequentially presented items and whether they are related to the primacy effect, i.e., improved LTM encoding of items presented at the beginning of the list.”
claim-typemechanism— “Our present findings demonstrate that hippocampus-independent WM at early list-positions is not beneficial for LTM and results in subsequent forgetting.”
method — evidence— “Intracranial electroencephalogram in epilepsy patients and functional MRI in healthy subjects were recorded during a word-list learning task.”
object of study — evidence— “Here, we used two complimentary approaches to investigate whether WM-related activity patterns occur also during LTM encoding of sequentially presented items and whether they are related to the primacy effect, i.e., improved LTM encoding of items presented at the beginning of the list.”
research question — evidence— “However, it is still an open question which forms of WM support memory for these items.”
contribution — evidence— “However, deactivations of the hippocampus as previously observed during WM maintenance of individual items predicts failure of LTM encoding.”
transferfrom classical memory psychology: serial position curves and the primacy effect, imported as the behavioural handle on a neural question— “It has been proposed that the primacy effect is due to the fact that items at early list positions undergo more extensive rehearsal than items presented later ( Rundus, 1971 ; Brodie and Murdock, 1977 ). This idea suggests a link between LTM formation and rehearsal processes, which are attributed to working memory”transfers[0]
mechanismEarly list items processed by single-item, hippocampus-independent working memory leave the hippocampus deactivated, so no encoding into long-term memory takes place and the item is forgotten— “Our present findings demonstrate that hippocampus-independent WM at early list-positions is not beneficial for LTM and results in subsequent forgetting.”mechanisms[0]
mechanismWhen multi-item, hippocampus-dependent working memory is recruited instead at early list positions, the same hippocampal engagement supports long-term encoding— “Recruitment of hippocampus-dependent WM at early list positions thus actually supports LTM formation.”mechanisms[1]
mechanismItems early in the list are rehearsed more, and later items interfere with earlier ones, which is why the primacy advantage arises and why hippocampal engagement stops predicting memory later in the list— “Based on the model of Atkinson and Shiffrin (1968) , we suggest that items later in the list are not rehearsed as much as the items earlier in the list (explaining the primacy effect) and that later items interfere with previous words.”mechanisms[2]
mechanismworking memory is divided by neural signature: hippocampal activation for multiple items, deactivation for individual items— “A recent study showed that maintenance of multiple items was associated with hippocampal activation (hippocampus-dependent WM), while maintenance of individual items induced hippocampal deactivations (hippocampus-independent WM).”mechanisms[3]
mechanismpositive DC slopes in the iEEG are taken to correspond to BOLD deactivations, which is what lets the two datasets be read together— “These results are consistent with our iEEG findings because positive DC shifts likely correspond to deactivations”mechanisms[4]
mechanismitems at the start of a list are proposed to be rehearsed more, linking the primacy effect to working memory— “It has been proposed that the primacy effect is due to the fact that items at early list positions undergo more extensive rehearsal than items presented later ( Rundus, 1971 ; Brodie and Murdock, 1977 ). This idea suggests a link between LTM formation and rehearsal processes, which are attributed to working memory”mechanisms[5]
mechanismsuccessful early items are encoded in runs: encoding the first raises the conditional probability of encoding the second and third— “For the iEEG subjects, encoding success at the second position was indeed slightly higher if the first item was successfully encoded: While overall probability for LTM encoding at the second list position was 0.35, it increased to 0.51 if only trials where the first word was already successfully encoded were taken into account (conditional…mechanisms[6]
mechanismonly the hemisphere contralateral to the seizure focus was analysed, in patients with confirmed unilateral sclerosis— “Only data from the hemisphere contralateral to the seizure onset zone were considered for analysis.”mechanisms[7]
builds-on Fernández et al., 1999— “Here, we directly addressed this issue by reanalyzing iEEG data from a LTM study with lists of 12 serially presented words ( Fernández et al., 1999 ) as well as new fMRI data using the same paradigm ( Fig. 1 ).”claim_relations[0]
extends Axmacher et al., 2007— “This pattern is similar to our previous findings during WM encoding and maintenance of single items ( Axmacher et al., 2007 ).”claim_relations[1]
builds-on Atkinson and Shiffrin (1968)— “Based on the model of Atkinson and Shiffrin (1968) , we suggest that items later in the list are not rehearsed as much as the items earlier in the list (explaining the primacy effect) and that later items interfere with previous words.”claim_relations[2]
extends the authors' own Sternberg study distinguishing hippocampus-dependent from hippocampus-independent working memory— “Our data suggest that WM for individual items is related to a hippocampal deactivation (hippocampus-independent WM), and that this deactivation is reduced during WM for multiple items (hippocampus-dependent WM).”claim_relations[3]
extends Fernandez et al. 1999, whose iEEG data are reanalysed here for a different questionclaim_relations[4]
supports the rehearsal account of the primacy effectclaim_relations[5]
supports fMRI findings that working-memory maintenance facilitates long-term encoding
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claim_relations[6]
senseworking memory is subdivided here by NEURAL SIGNATURE rather than by task or capacity: hippocampus-dependent when multiple items are held, hippocampus-independent when one is
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senses[0]
sensea deactivation is used as a positive finding - the absence of hippocampal engagement is the marker, not a null
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senses[1]
senseeffects of position and LINEAR effects of position are distinguished explicitly, with the a priori assumption of the second stated: that if there are effects across positions, these should be linear
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senses[2]
sensethe DC potential and the BOLD signal are treated as two measures of one underlying quantity, on the strength of a cited correspondence rather than a within-subject comparison
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senses[3]
controla group of healthy control subjects investigated with fMRI alongside the patient recordings — held — rules out the hippocampal working-memory effect being a property of the epileptic brains the depth electrodes are implanted in
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controls[0]
auditdeactivation —causes→ long-term memory — Audit 2026-09-28: DOUBTFUL - read against its span and kept, but the span says hippocampal deactivation predicts failure of encoding; the edge carries no direction.
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concept_edges[0]
notedeactivation —causes→ long-term memory — predicts FAILURE of encoding; the sign matters and the schema records only the pair
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concept_edges[0]
weightdeactivation —causes→ long-term memory — 0.8
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concept_edges[0]
auditworking memory —causes→ long-term memory — Audit 2026-09-28: DOUBTFUL - read against its full span and kept, but the span says the idea 'SUGGESTS A LINK' between LTM formation and rehearsal attributed to working memory; causes is hedged.
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concept_edges[2]
evidential statusworking memory —causes→ long-term memory — ATTRIBUTED TO NAMED WORK AND OFFERED AS AN IDEA: 'IT HAS BEEN PROPOSED THAT the primacy effect is due to the fact that items at early list positions undergo more extensive rehearsal than items presented later (Rundus, 1971; Brodie and Murdock, 1977). THIS IDEA SUGGESTS a link between LTM formation and rehearsal processes'. The relation is real and this paper builds on it; it belongs to two papers from the 1970s.
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concept_edges[2]
noteworking memory —causes→ long-term memory — via rehearsal, which is the proposed account of the primacy effect
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concept_edges[2]
weightworking memory —causes→ long-term memory — 0.8
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concept_edges[2]
auditprimacy —contrasted-with→ recency — Audit 2026-09-28: DOUBTFUL - read against its span and kept, but the span reports only the recency effect; the contrast with primacy is not in it.
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concept_edges[3]
outcome (stated by the tagger, no quotation)control — heldcontrols[0]
for which uselimitation — every claim about what was held in working memory: THERE IS NO BEHAVIORAL MONITORING OF WM PERFORMANCE IN THE CURRENT EXPERIMENT
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limitations[0]
for which uselimitation — any claim about what was held in mind: WE DO NOT KNOW FOR SURE HOW LTM IS ACTUALLY AFFECTED BY THE WM PERFORMANCE FOR SPECIFIC ITEMS, I.E., IT IS UNKNOWN WHICH ITEMS ARE ACTUALLY MAINTAINED IN WM
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limitations[1]
for which uselimitation — the link to the in vitro literature: THIS ANALOGY BETWEEN ELECTROPHYSIOLOGICAL DATA IN VITRO AND THE NEURAL PATTERNS DURING WM MAINTENANCE MUST REMAIN SPECULATIVE AT THE CURRENT STAGE
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limitations[2]
for which uselimitation — the position-specific null: THIS LACK OF AN EFFECT IS RELATED TO THE REDUCED STATISTICAL POWER FOR POSITION-SPECIFIC ANALYSES OF SUBSEQUENT MEMORY EFFECTS
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limitations[3]
for which uselimitation — any comparison between the two populations: DESPITE THIS SHORTER RECALL PHASE, THE NUMBER OF WORDS RECALLED BY THE FMRI SUBJECTS WAS SIGNIFICANTLY HIGHER THAN THE NUMBER OF WORDS RECALLED BY THE PATIENTS
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limitations[4]
for which uselimitation — any comparison between the fMRI and intracranial versions: they differ in presentation time (1000 ms, since goggles REQUIRED LONGER PRESENTATION TIMES), interstimulus interval and block count
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limitations[5]
for which uselimitation — any serial-position claim carried across the two groups: NO RECENCY EFFECTS AT THE END of the list were found in the fMRI subjects, against primacy AND recency in the patients
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limitations[6]
for which uselimitation — the whole-brain effects: THESE EFFECTS DID NOT SURVIVE CORRECTION FOR MULTIPLE COMPARISONS, BUT DID HAVE A LARGE EXTENSION OF 60 VOXELS FOR THE SERIAL POSITION CONTRAST OF SUBSEQUENTLY FORGOTTEN WORDS
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limitations[7]
for which uselimitation — the subsequently-forgotten results, with their exact values: WE FOUND A TREND FOR AN EFFECT OF POSITION (F (2,36) = 2.943; p = 0.070) AND FOR A LINEAR EFFECT OF POSITION (F (1,18) = 4.249; p = 0.054)
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limitations[8]
duplicate oflimitation — limitations[3]
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limitations[9]
for which uselimitation — the same scope as limitations[3] - the position-specific analyses, underpowered
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limitations[9]
for which uselimitation — any bilateral hippocampal claim: FOR THE RIGHT HIPPOCAMPUS, A THREE-WAY ANOVA DID NOT REVEAL AN EFFECT OF, OR INTERACTION WITH, THE FACTOR POSITION (ALL p > 0.3), BUT A SIGNIFICANT MAIN EFFECT OF MEMORY (F (1,18) = 8.898; p < 0.01)
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limitations[10]
for which uselimitation — the rote-strategy assumption: ALL SUBJECTS WERE REQUIRED TO USE A ROTE STRATEGY ... AVOIDING MEMORY AIDS - instructed, and verified only by asking afterwards
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limitations[11]
evidential statusmechanism — the paper's own words: we suggest that
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mechanisms[2]
replicationuntested
limitationNo behavioural measure of working-memory performance was collected, so it is unknown which items were actually held in WM.
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limitations[0]
limitationThe link between the observed activity and actual long-term memory consequences of WM performance cannot be established.
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limitations[1]
limitationThe proposed link to persistent activity recorded in vitro is acknowledged as speculative.
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limitations[2]
limitationPosition-specific subsequent-memory analyses were statistically underpowered.
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limitations[3]
limitationthe two populations differ in recall performance despite a shorter recall phase for the fMRI group
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limitations[4]
limitationthe paradigms differ between the two versions in presentation time, interstimulus interval, block count and recall duration
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limitations[5]
limitationpatients showed both primacy and recency; the fMRI subjects showed no recency at all
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limitations[6]
limitationthe whole-brain effects did not survive correction for multiple comparisons and are reported at the cluster level instead
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limitations[7]
limitationseveral supporting results are trends at p between 0.05 and 0.07, labelled as such
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limitations[8]
limitationa position-specific null is attributed to reduced statistical power
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limitations[9]
limitationeffects appear in the left hippocampus and not the right, without an account of why
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limitations[10]
limitationthe required rote strategy is verified only by asking participants afterwards
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limitations[11]
Content tags
content-observations: finding · quantity · variable · definition · key-term — grounded in the full text
findingAs expected, more items were successfully encoded at the beginning of the list than at later positions.
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content_tags.findings[0]
findingEarly-list words that were later forgotten were accompanied by hippocampal deactivation signatures in both fMRI and intracranial EEG.
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content_tags.findings[1]
findingNo such deactivation appeared for later list items or for items that were successfully remembered.
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content_tags.findings[2]
findingIn the intracranial data the linear decline of DC slope across list positions was significant only for subsequently forgotten items.
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content_tags.findings[3]
findingA second, independent general linear model reproduced the effect: left-hippocampal negative BOLD for forgotten items at position one was absent at position seven.
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content_tags.findings[4]
findingThe position effect was left-lateralised: the right hippocampus showed a main effect of subsequent memory but no position effect.
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content_tags.findings[5]
findingFor both later-remembered and later-forgotten items, activity was most pronounced in the anterior cingulate cortex.
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content_tags.findings[6]
findingSuccessful encoding at the start of a list came in runs: encoding the first word raised the probability of encoding the second.
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content_tags.findings[7]
findingThe authors conclude that failing to engage hippocampus-dependent working memory early in a list causes the later encoding failure.
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content_tags.findings[8]
findinghippocampal deactivation at the first list position occurred for items that were later forgotten
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content_tags.findings[9]
findingno such deactivation appeared for items that were later remembered
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content_tags.findings[10]
findingDC slopes were positive early in the list for subsequently forgotten items and flattened later
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content_tags.findings[11]
findingonly the first position differed significantly from zero
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content_tags.findings[12]
findingin the iEEG subjects, encoding the first item raised the conditional probability of encoding the second (0.35 to 0.51)
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content_tags.findings[13]
findingthe patients showed a recency effect at the end of the list
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content_tags.findings[14]
findingthe healthy fMRI group showed primacy but no recency at all
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content_tags.findings[15]
findinga second general linear model comparing the first and seventh positions reproduced the result
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content_tags.findings[17]
quantityEight — epilepsy patients contributing intracranial EEG data
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content_tags.quantities[0]
quantityNineteen — healthy participants in the fMRI experiment
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content_tags.quantities[1]
quantity4.9% — proportion of EEG trials rejected as artefacts before analysis
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content_tags.quantities[2]
quantity0.35 / 0.51 — unconditional versus conditional probability of encoding the second list item in the iEEG patients
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content_tags.quantities[3]
quantitysmaller than 0.19 — maximum collinearity between the fMRI model regressors for adjacent list items (0 = orthogonal, 1 = collinear)
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content_tags.quantities[4]
quantityF (11,198) = 21.156; p < 10 −16 — effect of serial position on recall performance in the fMRI participants
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content_tags.quantities[5]
quantity8 epilepsy patients and 19 healthy subjects — the two samples
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content_tags.quantities[6]
quantity0.35 rising to 0.51 for the second item given the first — conditional encoding probability in patients
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content_tags.quantities[7]
quantity4.9% of trials excluded for artefacts — iEEG data rejection
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content_tags.quantities[8]
quantityMNI 30/-15/-18 and -30/-15/-18 — the anatomically defined hippocampal regions of interest
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content_tags.quantities[9]
quantityrecall phase 90 s for iEEG versus 60 s for fMRI, presentation 400 ms versus 1000 ms — the paradigm differences between the two versions
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content_tags.quantities[10]
value source notequantity — THE VALUE DRAWS ON THE PAPER BEYOND THIS QUOTE: part of it is printed elsewhere in the paper, not in this quote ('presented in uppercase letters for a duration of 400 ms.'). The 90 s is the 60 s of this quote plus the 30 s it says the other version lasted longer.content_tags.quantities[10]
quantityp = 0.054, p = 0.070, p = 0.054 — the trends reported as consistent with the iEEG result
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content_tags.quantities[11]
variablelist position (independent)
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content_tags.variables[0]
variablegroup (independent)
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.variables[2]
variableDC slopes (dependent)
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.variables[3]
variablenegative BOLD response (dependent)
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.variables[4]
variablehemisphere (control)
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.variables[6]
variableserial position
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.variables[7]
variablesubsequent memory
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.variables[8]
variableslope of the DC potential
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.variables[9]
definitionprimacy effect
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.definitions[1]
definitionlinear effects of position
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.definitions[2]
definitioneffects of position
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.definitions[4]
definitionhippocampus-dependent WM
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.definitions[5]
definitionhippocampus-independent WM
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.definitions[6]
key-termsworking memory, long-term memory, primacy, recency, hippocampus, deactivation, DC potentials, BOLD, serial position, intracranial, anterior cingulate cortex, rote, Sternberg, epilepsy, hippocampal sclerosis, free recall, encoding, medial temporal lobe, rehearsal, subsequent memory
Statistics — cross-field join keys
field-invariant statistical terms, used in their statistical sense (gated on a number / symbol / test). A p-value or a standard deviation means the SAME thing in physics, biology, psychology and sociology — so these are the strongest cross-field join keys. Grounded verbatim.
ANOVA F as written: A two-way ANOVA with “position” as repeated measure
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[0]
ANOVA F as written: a one-way ANOVA with position as repeated measure
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[1]
sphericity correction ε as written: Huynh–Feldt corrected for inhomogeneities of covariance
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[2]
t-test p as written: post hoc t tests
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[3]
t-test as written: two-tailed paired t tests
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[4]
t-test t as written: second-level one-sample t test
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[5]
regression as written: we fitted a linear regression line on the DC slopes
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[6]
general linear model as written: box-car regressor in a general linear model
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content_tags.statistics[7]
multiple-comparison correction as written: false discovery rate p < 0.05
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[8]
statistical-significance as written: an uncorrected threshold of p < 0.001
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[9]
repeated measures ANOVA with Huynh-Feldt correction
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[10]
linear regression of slopes across positions
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[11]
conditional versus unconditional probability
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[12]
cluster-level significance
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[13]
Second readings
a facet read a second time, independently, from its own sentence — and whether the two readings agree
claim typemechanism — a second reading reaching the same value; recorded: mechanism
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
alternatives.claim_type
methodintracranial EEG DC potentials in 8 epilepsy patients reanalysed from a 1999 study, plus new fMRI in 19 healthy subjects on the same word-list paradigm — a second reading DIFFERING from the recorded value; recorded: fmri
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
alternatives.method
phenomenonthe primacy effect and its hippocampal correlates — a second reading DIFFERING from the recorded value; recorded: working memory-long-term memory interaction in the hippocampus
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
alternatives.phenomenon

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