Document Detail

Amygdalar enlargement associated with unique perception.
MedLine Citation:
PMID:  18922517     Owner:  NLM     Status:  MEDLINE    
Interference by amygdalar activity in perceptual processes has been reported in many previous studies. Consistent with these reports, previous clinical studies have shown amygdalar volume change in multiple types of psychotic disease presenting with unusual perception. However, the relationship between variation in amygdalar volume in the normal population and the tendency toward unusual or unique perception has never been investigated. To address this issue, we defined an index to represent the tendency toward unique perception using ambiguous stimuli: subjects were instructed to state what the figures looked like to them, and "unique responses" were defined depending on the appearance frequency of the same responses in an age- and gender-matched control group. The index was defined as the ratio of unique responses to total responses per subject. We obtained structural brain images and values of the index from sixty-eight normal subjects. Voxel-based morphometry analyses revealed a positive correlation between amygdalar volume and the index. Since previous reports have indicated that unique responses were observed at higher frequency in the artistic population than in the nonartistic normal population, this positive correlation suggests that amygdalar enlargement in the normal population might be related to creative mental activity.
Tomoki Asari; Seiki Konishi; Koji Jimura; Junichi Chikazoe; Noriko Nakamura; Yasushi Miyashita
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-09-04
Journal Detail:
Title:  Cortex; a journal devoted to the study of the nervous system and behavior     Volume:  46     ISSN:  1973-8102     ISO Abbreviation:  Cortex     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2009-12-01     Completed Date:  2010-01-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0100725     Medline TA:  Cortex     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  94-9     Citation Subset:  IM    
Department of Physiology, The University of Tokyo School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan.
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MeSH Terms
Amygdala / anatomy & histology*,  physiology
Analysis of Variance
Image Processing, Computer-Assisted
Magnetic Resonance Imaging
Neuropsychological Tests
Organ Size
Photic Stimulation
Visual Perception / physiology*

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