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Neural correlates of associative and...

Achim, Amelie M.

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Neural correlates of associative and item memory.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Neural correlates of associative and item memory./
Author:	Achim, Amelie M.
Description:	116 p.
Notes:	Source: Masters Abstracts International, Volume: 43-04, page: 1216.
Contained By:	Masters Abstracts International43-04.
Subject:	Biology, Neuroscience. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MQ98583
ISBN:	0612985830

Neural correlates of associative and item memory.
Achim, Amelie M.

Neural correlates of associative and item memory. - 116 p.

Source: Masters Abstracts International, Volume: 43-04, page: 1216.

Thesis (M.Sc.)--McGill University (Canada), 2004.

Dissociation between memory for individual items and memory for associations has been reported in behavioral neurosciences, clinical populations and cognitive studies. At the brain level, this dissociation could reflect distinct patterns of activation for encoding and/or retrieval of items and associations. We used event-related functional Magnetic Resonance Imaging to assess neural correlates of item and associative encoding and retrieval in eighteen healthy subjects. During encoding, subjects memorized doubles (two identical images) and pairs (two different images). During retrieval, subjects made item recognition judgments (old versus new items) and associative recognition judgments (intact versus rearranged pairs). Greater hippocampal activation was observed for associative relative to item encoding, but also for item relative to associative recognition. This pattern of hippocampal activation is consistent with previous neuroimaging studies of associative encoding, but also suggests that at retrieval other processes such as novelty detection could recruit the hippocampus to a greater extent than associative recognition. In the prefrontal cortex, we observed right and left activation for associative and item encoding, respectively. At retrieval, the opposite pattern was observed with left prefrontal activation for associative and bilateral activation for item recognition. This pattern of prefrontal activation shows the implication of the prefrontal cortex in memory for both types of material, although with a different lateralization. Overall, these results show the importance of examining the memory stages when comparing neural correlates of item and associative memory.

ISBN: 0612985830Subjects--Topical Terms:

1017680
Biology, Neuroscience.

Neural correlates of associative and item memory.
LDR:02557nmm 2200289 4500 001 1815787
005 20060710080833.5
008 130610s2004 eng d
020 $a 0612985830
035 $a (UnM)AAIMQ98583
035 $a AAIMQ98583
040 $a UnM $c UnM
100 1 $a Achim, Amelie M. $3 1905196
245 1 0 $a Neural correlates of associative and item memory.
300 $a 116 p.
500 $a Source: Masters Abstracts International, Volume: 43-04, page: 1216.
500 $a Adviser: Martin Lepage.
502 $a Thesis (M.Sc.)--McGill University (Canada), 2004.
520 $a Dissociation between memory for individual items and memory for associations has been reported in behavioral neurosciences, clinical populations and cognitive studies. At the brain level, this dissociation could reflect distinct patterns of activation for encoding and/or retrieval of items and associations. We used event-related functional Magnetic Resonance Imaging to assess neural correlates of item and associative encoding and retrieval in eighteen healthy subjects. During encoding, subjects memorized doubles (two identical images) and pairs (two different images). During retrieval, subjects made item recognition judgments (old versus new items) and associative recognition judgments (intact versus rearranged pairs). Greater hippocampal activation was observed for associative relative to item encoding, but also for item relative to associative recognition. This pattern of hippocampal activation is consistent with previous neuroimaging studies of associative encoding, but also suggests that at retrieval other processes such as novelty detection could recruit the hippocampus to a greater extent than associative recognition. In the prefrontal cortex, we observed right and left activation for associative and item encoding, respectively. At retrieval, the opposite pattern was observed with left prefrontal activation for associative and bilateral activation for item recognition. This pattern of prefrontal activation shows the implication of the prefrontal cortex in memory for both types of material, although with a different lateralization. Overall, these results show the importance of examining the memory stages when comparing neural correlates of item and associative memory.
590 $a School code: 0781.
650 4 $a Biology, Neuroscience. $3 1017680
650 4 $a Psychology, Psychobiology. $3 1017821
650 4 $a Psychology, Cognitive. $3 1017810
690 $a 0317
690 $a 0349
690 $a 0633
710 2 0 $a McGill University (Canada). $3 1018122
773 0 $t Masters Abstracts International $g 43-04.
790 1 0 $a Lepage, Martin, $e advisor
790 $a 0781
791 $a M.Sc.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MQ98583