Document Detail

Human cortico-hippocampal activity related to auditory discrimination revealed by neuromagnetic field.
MedLine Citation:
PMID:  9189909     Owner:  NLM     Status:  MEDLINE    
We carried out multi-dipole estimation and pursued spatio-temporal brain activity on a time scale of several milliseconds during an auditory discrimination task using a whole-cortex type SQUID system. Neuronal activities were estimated in the medial (hippocampus, parahippocampal gyrus, etc.) and lateral temporal cortices (superior and middle temporal gyri, etc.), the dorsolateral prefrontal cortex (middle and inferior frontal gyri, etc.) and the parietal cortex (supramarginal gyrus, etc.) in the 280-400 ms latency range. The activity in the posterior hippocampal region was the most prominent and long-lasting in parallel with the activities in the other regions. Therefore, the posterior hippocampal region is a central structure engaged in auditory discrimination. The whole-cortex neuromagnetic measurements provided the possibility of imaging the time-varying activities of the human cortico-hippocampal neural networks.
Y Kikuchi; H Endo; S Yoshizawa; M Kait; C Nishimura; M Tanaka; T Kumagai; T Takeda
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Neuroreport     Volume:  8     ISSN:  0959-4965     ISO Abbreviation:  Neuroreport     Publication Date:  1997 May 
Date Detail:
Created Date:  1997-07-31     Completed Date:  1997-07-31     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9100935     Medline TA:  Neuroreport     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1657-61     Citation Subset:  IM    
Tokyo Medical and Dental University, Tokyo, Japan.
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MeSH Terms
Analysis of Variance
Auditory Cortex / physiology*
Auditory Perception / physiology*
Discrimination (Psychology) / physiology*
Hippocampus / physiology*
Magnetic Resonance Imaging
Neurons / physiology

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