View in EDS

Perceptual and semantic contributions to episodic memory: evidence from semantic dementia and Alzheimer's disease.

Saved in:
Bibliographic Details
Title: Perceptual and semantic contributions to episodic memory: evidence from semantic dementia and Alzheimer's disease.
Authors: Simons JS (AUTHOR), Graham KS (AUTHOR), Hodges JR (AUTHOR)
Source: Journal of Memory & Language. Aug2002, Vol. 47 Issue 2, p197-213. 17p.
Abstract: Previous group studies involving patients with semantic dementia, who have impaired semantic memory associated with temporal lobe atrophy, have documented the preservation of pictorial recognition memory, in contrast to patients with early Alzheimer's disease, who characteristically exhibit amnesia. The present study replicated this general pattern, although four of the semantic dementia patients with the most severe semantic deficit additionally had impaired recognition memory. Three factors that might contribute to this pattern of memory performance were examined: atrophic damage to medial temporal lobe regions, degradation of semantic representations, and disruption to visuoperceptual processes. Assessment of MRI scans revealed that atrophy affecting the perirhinal cortex region accurately predicted the recognition memory deficit seen at advanced stages of semantic dementia, but there was no evidence that it could be attributed directly either to degraded semantic knowledge or disrupted perceptual processing. In Alzheimer's disease, evidence suggested that visuoperceptual impairment might be involved in the poor recognition memory typically seen in the disorder. These results have implications for the differential diagnosis of semantic dementia and Alzheimer's disease and for cognitive and neural theories of human long-term memory. Copyright © 2002 by Elsevier Science (USA). [ABSTRACT FROM AUTHOR]
Copyright of Journal of Memory & Language is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
FullText Text:
  Availability: 0
Header DbId: ehh
DbLabel: Education Research Complete
An: 106986637
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Perceptual and semantic contributions to episodic memory: evidence from semantic dementia and Alzheimer's disease.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Simons+JS%22">Simons JS</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Graham+KS%22">Graham KS</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hodges+JR%22">Hodges JR</searchLink> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+Memory+%26+Language%22">Journal of Memory & Language</searchLink>. Aug2002, Vol. 47 Issue 2, p197-213. 17p.
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Previous group studies involving patients with semantic dementia, who have impaired semantic memory associated with temporal lobe atrophy, have documented the preservation of pictorial recognition memory, in contrast to patients with early Alzheimer's disease, who characteristically exhibit amnesia. The present study replicated this general pattern, although four of the semantic dementia patients with the most severe semantic deficit additionally had impaired recognition memory. Three factors that might contribute to this pattern of memory performance were examined: atrophic damage to medial temporal lobe regions, degradation of semantic representations, and disruption to visuoperceptual processes. Assessment of MRI scans revealed that atrophy affecting the perirhinal cortex region accurately predicted the recognition memory deficit seen at advanced stages of semantic dementia, but there was no evidence that it could be attributed directly either to degraded semantic knowledge or disrupted perceptual processing. In Alzheimer's disease, evidence suggested that visuoperceptual impairment might be involved in the poor recognition memory typically seen in the disorder. These results have implications for the differential diagnosis of semantic dementia and Alzheimer's disease and for cognitive and neural theories of human long-term memory. Copyright © 2002 by Elsevier Science (USA). [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Memory & Language is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=ehh&AN=106986637
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/s0749-596x(02)00003-7
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 197
    Titles:
      – TitleFull: Perceptual and semantic contributions to episodic memory: evidence from semantic dementia and Alzheimer's disease.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Simons JS
      – PersonEntity:
          Name:
            NameFull: Graham KS
      – PersonEntity:
          Name:
            NameFull: Hodges JR
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 08
              Text: Aug2002
              Type: published
              Y: 2002
          Identifiers:
            – Type: issn-print
              Value: 0749596X
          Numbering:
            – Type: volume
              Value: 47
            – Type: issue
              Value: 2
          Titles:
            – TitleFull: Journal of Memory & Language
              Type: main
ResultId 1