Document Detail


Should spikes be treated with equal weightings in the generation of spectro-temporal receptive fields?
MedLine Citation:
PMID:  19941954     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Knowledge on the trigger features of central auditory neurons is important in the understanding of speech processing. Spectro-temporal receptive fields (STRFs) obtained using random stimuli and spike-triggered averaging allow visualization of trigger features which often appear blurry in the time-versus-frequency plot. For a clearer visualization we have previously developed a dejittering algorithm to sharpen trigger features in the STRF of FM-sensitive cells. Here we extended this algorithm to segregate spikes, based on their dejitter values, into two groups: normal and outlying, and to construct their STRF separately. We found that while the STRF of the normal jitter group resembled full trigger feature in the original STRF, those of the outlying jitter group resembled a different or partial trigger feature. This algorithm allowed the extraction of other weaker trigger features. Due to the presence of different trigger features in a given cell, we proposed that in the generation of STRF, the evoked spikes should not be treated indiscriminately with equal weightings.
Authors:
T R Chang; T W Chiu; P C Chung; Paul W F Poon
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-11-23
Journal Detail:
Title:  Journal of physiology, Paris     Volume:  104     ISSN:  1769-7115     ISO Abbreviation:  J. Physiol. Paris     Publication Date:    2010 May-Sep
Date Detail:
Created Date:  2010-05-03     Completed Date:  2010-07-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9309351     Medline TA:  J Physiol Paris     Country:  France    
Other Details:
Languages:  eng     Pagination:  215-22     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2009 Elsevier Ltd. All rights reserved.
Affiliation:
Department of Computer Science and Information Engineering, Southern Taiwan University, Tainan, Taiwan.
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MeSH Terms
Descriptor/Qualifier:
Acoustic Stimulation / methods
Action Potentials / physiology*
Algorithms
Animals
Dose-Response Relationship, Radiation
Evoked Potentials, Auditory / physiology
Male
Models, Neurological*
Neurons / physiology*
Nonlinear Dynamics
Occipital Lobe / cytology*
Psychophysics
Random Allocation
Rats
Rats, Sprague-Dawley
Reaction Time
Signal Processing, Computer-Assisted*
Sound Spectrography
Spectrum Analysis
Time Factors
Time Perception / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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