標題: Should spikes be treated with equal weightings in the generation of spectro-temporal receptive fields?
作者: Chang, T. R.
Chiu, T. W.
Chung, P. C.
Poon, Paul W. F.
交大名義發表
生物科技學系
電子工程學系及電子研究所
腦科學研究中心
National Chiao Tung University
Department of Biological Science and Technology
Department of Electronics Engineering and Institute of Electronics
Brain Research Center
關鍵字: STRF;Trigger feature;Response jitter;FM-sensitive cells;Auditory midbrain
公開日期: 1-五月-2010
摘要: 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. (C) 2009 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jphysparis.2009.11.026
http://hdl.handle.net/11536/5482
ISSN: 0928-4257
DOI: 10.1016/j.jphysparis.2009.11.026
期刊: JOURNAL OF PHYSIOLOGY-PARIS
Volume: 104
Issue: 3-4
起始頁: 215
結束頁: 222
顯示於類別:期刊論文


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