Functional compensation of increasing memory encoding demands in the hippocampus.

Abstract:

:The hippocampus is well known to contribute to episodic memory encoding. Here we used functional magnetic resonance imaging to investigate the hippocampal response to exponentially varying encoding demands while forming associations between faces and names. We found that only the left hippocampus exhibited a stepped modulation of neuronal activity, which was furthermore correlated with individual memory performance. The right hippocampus, in contrast, showed a constant strong engagement throughout all difficulty levels. We hypothesize that the left hippocampus functionally compensated an overload of right hippocampal resources in an attempt to prevent memory decline. This explanation could help reconcile controversies in the debate of material-specific (i.e. verbal vs. nonverbal) lateralization of hippocampal activation.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Ulrich M,Jonas C,Grön G

doi

10.1097/WNR.0b013e3283340d36

subject

Has Abstract

pub_date

2010-01-06 00:00:00

pages

59-63

issue

1

eissn

0959-4965

issn

1473-558X

journal_volume

21

pub_type

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