Memory — TEI-tagged view

Eichenbaum · 2008 · neuroscience · doi:10.4249/scholarpedia.1747 · 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. limitations is empty because this Scholarpedia entry never comments on the limits of its own account - it is a consensus overview with no methods, no data and no hedging about its own scope. Claim relations is empty because although the entry cites prior work heavily (Scoville & Milner 1957, Squire et al. 2004, McClelland et al. 1995 and others), it never positions itself for or against any of them; every citation is a bare source for a stated fact, which rule 7 excludes. method is review inferred from the entry's form - it synthesises other people's studies and reports no study of its own; the quoted sentence is the closest the text comes to describing itself ("a central tenet in this field"), since it never says "this review". Replication status = replicated rests on the entry's own wording that imaging studies "have confirmed" the medial-temporal findings first drawn from patient H.M. 2026-08-12 and 2026-08-26 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.
This record’s own method is review, and the tags below follow from that. A review’s findings, quantities and statistics are things stated IN this paper, and some of them report results obtained elsewhere. No tag on this page names a different author. Measured across every review in this corpus, 81% of a review’s tags carry no citation at all — most of them are the review speaking. The corpus does not adjudicate the rest: read an unmarked tag as a claim this paper makes, not necessarily one it made first.
Other fields define these differently the same word, defined another way in another discipline
memory 23 fields · learning 7 fields · working memory 4 fields · semantic memory 4 fields · episodic memory 3 fields · priming 2 fields · and 2 more →
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
multiple memory systems declarative memory3 implicit memory9 episodic memory15 semantic memory8 working memory27 iconic memory3 procedural memory3 emotional memory relational memory processing memory consolidation2 medial temporal lobe8 hippocampus29 long-term potentiation2 long term depression2 Hebbian synapse false memory habituation4 sensitization familiarity8 recollection5 associative memory3 review319

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
phenomenonmemory— “Memory is the record of experience represented in the brain.”
claim-typeexistence— “There are multiple forms of memory supported by distinct brain systems.”
method — evidence— “Thus a central tenet in this field is that there are multiple memory systems , each characterized by distinct operating characteristics and brain pathways in which memories are embodied in the plasticity of information processing within the relevant neural circuit (Figure 1; Eichenbaum & Cohen, 2001).”
object of study — evidence— “Memory is the record of experience represented in the brain.”
mechanismCoincident excitatory input and depolarization at NMDA receptors admits Ca++, triggering a cAMP-CREB-immediate-early-gene-protein-synthesis cascade that structurally fixes the synaptic change— “LTP is typically induced by the co-occurence of excitatory input and intracellular depolarization at the so-called Hebbian synapse , involving N-methyl-d-aspartate (NMDA) receptors that allow the entry of Ca++ into the synapse, which activates cyclic adenosine monophosphate (cAMP).”mechanisms[0]
mechanismRepeated two-way medial-temporal-cortical interactions (including replay) progressively reorganize connections among cortical representations, consolidating episodes and semantic knowledge into permanent storage— “Over a prolonged period, these interactions result in a substantial reorganization and consolidation of connections among cortical representations to incorporate the information contained in new episodes and abstracted semantic knowledge into permanent memory (McClelland et al., 1995).”mechanisms[1]
mechanismEmotional arousal releases glucocorticoids and engages adrenergic mechanisms through the amygdala, which modulates the strength of memory fixation in other memory systems— “Emotional arousal induces the release of glucocorticoids and adrenergic mechanisms via the amygdala, influencing memory fixation in both the declarative and procedural memory systems and in both animals and humans.”mechanisms[2]
mechanismThe medial temporal lobe converts short-term into long-term memory without being the permanent store, which is why H.M. lost new memories and kept old ones— “Furthermore, the fact that H.M. retains memories for events that occurred remotely…mechanisms[3]
mechanismDeclarative memory works by binding items to each other, to their context and to neighbouring events, which is what makes it relational
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.
mechanisms[4]
mechanismFalse memory is a failure of that same relational machinery rather than a separate defect - the network returns relations that never occurred
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mechanisms[5]
mechanismLong-term potentiation runs through a molecular cascade ending in protein synthesis, and blocking any step blocks permanent memory
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mechanisms[6]
mechanismThe timing of that blockade separates the two kinds of memory: it stops permanent fixation and leaves initial learning and short-term memory intact
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mechanisms[7]
mechanismPotentiation and depression share a molecular substrate and differ only in the timing rules of synaptic activity
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mechanisms[8]
extends Scoville and Milner's report of patient H.M.
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claim_relations[0]
supports Schacter's characterisation of implicit memory
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claim_relations[1]
extends Eichenbaum and Cohen's multiple-memory-systems framework
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claim_relations[2]
sensememory - divided by DURATION: whether it lasts a short or a long period
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senses[0]
sensememory - divided by EXPRESSION: explicit conscious remembering versus implicit change in speed or bias
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senses[1]
sensememory - divided by CONTENT: unique experiences versus accumulated knowledge, the episodic/semantic axis
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senses[2]
senseshort-term memory - as working memory: explicitly a form of DECLARATIVE memory, held in consciousness
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senses[3]
senseimplicit memory - as a family of LONG-term systems: procedural, emotional and priming, each with its own pathway
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senses[4]
senserecognition - familiarity versus recollection: two capacities of one cortical-hippocampal system
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senses[5]
edgeworking memory —is-a→ declarative memory
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concept_edges[0]
edgeprocedural memory —is-a→ implicit memory
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concept_edges[2]
edgedeclarative memory —distinct-from→ implicit memory
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concept_edges[4]
auditmedial temporal lobe —causes→ memory consolidation — Audit 2026-09-28: DOUBTFUL - read against its full span and kept, but the span writes 'converting a short-term memory to a long-term, permanent memory store', not 'memory consolidation'.
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.
concept_edges[5]
edgehippocampus —part-of→ medial temporal lobe
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concept_edges[6]
auditrelational memory processing —causes→ false memory — Audit 2026-09-28: DOUBTFUL - read against its full span and kept, but endpoint by anaphora: 'relational processing' = relational memory processing (previous sentence).
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concept_edges[7]
auditlong-term potentiation —part-of→ Hebbian synapse — Audit 2026-09-28: DOUBTFUL - read against its full span and kept, but LTP is INDUCED AT the Hebbian synapse; part-of is loose.
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concept_edges[8]
edgelong term depression —contrasted-with→ long-term potentiation
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concept_edges[9]
audithabituation —part-of→ multiple memory systems — Audit 2026-09-28: DOUBTFUL - read against its full span and kept, but habituation is named among the elementary FORMS of memory; part-of 'multiple memory systems' is loose.
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.
concept_edges[11]
edgefamiliarity —distinct-from→ recollection
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concept_edges[12]
noteepisodic memory —is-a→ associative memory — REPLACES concept_edges[1], which typed episodic memory as a kind of DECLARATIVE memory. That is true of the field and this paper does not say it: the only sentence in the staged body placing episodic memory under a superclass places it under ASSOCIATIVE memory. The old edge is withdrawn, not corrected in place, because its 'to' was wrong rather than its quote. NO 'relation'/relation evidence ON THIS EDGE, DELIBERATELY: the sentence's class cue is 'the most complex forms of associative memory', and the gate's is-a cue list holds 'a form of' but not 'forms of'. That is an earlier note of ours exactly - the cue vocabulary lacks the plural of a form it already accepts - and I am not editing the cue lists, which have two named amenders. The edge therefore joins the 92% that carry a span and no marked clause. Add the clause when the vocabulary is widened.
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concept_edges[14]
weightepisodic memory —is-a→ associative memory — 0.9
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concept_edges[14]
for which uselimitation — the empirical base of the whole systems framework: it begins with THE STUDY OF A PATIENT KNOWN BY HIS INITIALS H.M. - a single surgical case
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limitations[0]
for which uselimitation — any claim that the memory systems are separable: THE PROCEDURAL AND EMOTIONAL MEMORY SYSTEMS CAN STORE AND DISTINCTLY EXPRESS DIFFERENT FORMS OF MEMORY EVEN FOR THE SAME EVENT - distinct and simultaneously overlapping
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limitations[1]
for which uselimitation — the category implicit memory itself: THESE VARIOUS FORMS OF IMPLICIT MEMORY ARE SUPPORTED BY A VARIETY OF MEMORY SYSTEMS - it is not one system but the residue left when declarative memory is removed
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limitations[2]
replicationreplicated
limitationThe foundational evidence for the whole framework rests on a single surgical patient
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limitations[0]
limitationThe systems are described as distinct while also interacting and storing the same event separately, so the boundaries are functional rather than sharp
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limitations[1]
limitationImplicit memory is characterised as a variety of systems rather than one, so the category is defined by what it is not
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limitations[2]
Content tags
content-observations: finding · quantity · variable · definition · key-term — grounded in the full text
findingAcross all its varieties, memory is claimed to reduce to changes in synaptic connections inside the circuits of each memory system.
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content_tags.findings[0]
findingBlocking the molecular cascade only works within minutes of learning, which shows the cascade is needed for permanent fixation but not for initial or short-term memory.
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content_tags.findings[1]
findingEpisodic memory is the form most prominently impaired by aging, even though all types of learning capacity decline somewhat.
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content_tags.findings[2]
findingAge-related memory loss is attributed to fewer synaptic connections and weakened neuromodulation rather than to neuronal death.
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content_tags.findings[3]
findingFalse memory is characterised as a failure of relational processing that retrieves relations which never occurred but are supported by the relational network.
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content_tags.findings[4]
findingH.M. could not remember new information, yet kept considerable memories from childhood up to a few years before his surgery.
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content_tags.findings[5]
findingblocking the molecular cascade prevents permanent memory while leaving initial learning and short-term memory intact
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content_tags.findings[6]
findingamnesic patients impaired in declarative memory typically retain implicit memory
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content_tags.findings[7]
findingpotentiation and depression occur in every structure known to take part in memory
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content_tags.findings[8]
definitionmemory
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content_tags.definitions[0]
definitionmultiple memory systems
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content_tags.definitions[1]
definitionlearning
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content_tags.definitions[2]
definitiondeclarative memory
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content_tags.definitions[3]
definitionworking memory
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content_tags.definitions[4]
definitionepisodic memory
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content_tags.definitions[5]
definitionsemantic memory
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content_tags.definitions[6]
definitionimplicit memory
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content_tags.definitions[7]
definitionpriming
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content_tags.definitions[8]
definitionprocedural memory
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content_tags.definitions[9]
definitionmemory consolidation
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content_tags.definitions[10]
definitionrelational memory processing
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content_tags.definitions[11]
definitionlong-term potentiation (LTP)
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content_tags.definitions[12]
definitionlong term depression (LTD)
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content_tags.definitions[13]
definitionflashbulb memories
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content_tags.definitions[14]
definitiondeclarative memory
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content_tags.definitions[15]
definitionimplicit memory
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content_tags.definitions[16]
definitionepisodic memory
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content_tags.definitions[17]
definitionworking memory
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content_tags.definitions[18]
definitionprocedural memory
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content_tags.definitions[19]
definitionlong-term potentiation
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content_tags.definitions[20]
definitionmemory consolidation
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content_tags.definitions[21]
definitionlearning
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content_tags.definitions[22]
key-termsmultiple memory systems, declarative memory, implicit memory, episodic memory, semantic memory, working memory, iconic memory, procedural memory, emotional memory, relational memory processing, memory consolidation, medial temporal lobe, long-term potentiation, long term depression, Hebbian synapse, false memory, familiarity, recollection
Concepts
terms this paper carries, each with the sentence it was cut from — the layer that joins one paper to another. Terms with no quote yet are on CONCEPTS.html.
conceptlong-term potentiation — not defined in this paper's own words; a lasting increase in synaptic strength, the cellular model of memory
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concepts[13]
conceptassociative memory — not defined in this paper's own words; the class this paper actually places episodic and semantic memory under - the most complex end of a range that starts at habituation and sensitization
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concepts[21]
Second readings
a facet read a second time, independently, from its own sentence — and whether the two readings agree
claim typeexistence — a second reading reaching the same value; recorded: existence
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alternatives.claim_type
phenomenonmemory — a second reading reaching the same value; recorded: memory
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alternatives.phenomenon

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