The Orientation Selectivity of Spike-LFP Synchronization in Macaque V1 and V4

被引:5
作者
Li, Zhaohui [1 ,2 ]
Gao, Mengyu [1 ,2 ]
Wang, Yongtian [1 ,2 ]
机构
[1] Yanshan Univ, Sch Informat Sci & Engn, Qinhuangdao, Hebei, Peoples R China
[2] Yanshan Univ, Hebei Key Lab Informat Transmiss & Signal Proc, Qinhuangdao, Hebei, Peoples R China
基金
中国国家自然科学基金;
关键词
orientation selectivity; multi-electrode array; spike; local field potential; synchronization; LOCAL-FIELD POTENTIALS; PRIMARY VISUAL-CORTEX; AWAKE; SINGLE; EEG; COMMUNICATION; RECORDINGS; PERCEPTION; DYNAMICS; RHYTHMS;
D O I
10.3389/fncom.2019.00047
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Orientation selectivity is a fundamental property of visual cortical neurons and plays a crucial role in pattern perception. Although many studies have dedicated to explain how the orientation selectivity emerged, the mechanism underlying orientation selectivity is still not clear. In this work, we investigated the synchronization between spikes and local field potentials (LFP) in gamma band, with the aim of providing a new avenue to analyze the orientation selectivity. The experimental data were recorded by utilizing two chronically implanted multi-electrode arrays, where each array consisted of 48 electrodes and was placed over V1 and V4, respectively, in two macaques performing a selective visual attention task. An unbiased and robust measure for quantifying the synchronization between spikes and LFP was employed in the analysis process, which is termed as spike-triggered correlation matrix synchronization (SCMS) and performs reliably for limited samples of data. We observed the spike-LFP synchronization in three cases, i.e., spikes and LFP in V1, spikes and LFP in V4, spikes in V4 and LFP in V1. From the orientation tuning curves based on the spike-LFP synchronization, it is found that there is a strong correlation between the synchronization and grating orientation. The neurons in both V1 and V4 exhibit orientation selectivity, but V1 is stronger. In addition, the spike-LFP synchronization strength between V1 and V4 also shows orientation selectivity to drifting gratings. It means that the synchronization not only reflects the basic features of visual stimulation, but also describes the orientation tuning characteristics of neurons in different regions. Our results suggest that the spike-LFP synchronization can be used as an alternative and effective method to study the mechanism for generating orientation selectivity of visual neurons.
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页数:8
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