ネコ初期視覚野における神経細胞の同期的な活動

DOI Web Site

書誌事項

タイトル別名
  • Synchronized Neuronal Activities Induced by Grating Stimuli in the Cat Early Visual Cortex
  • ネコ ショキ シカクヤ ニ オケル シンケイ サイボウ ノ ドウキテキ ナ カツドウ

この論文をさがす

抄録

Extracellularly recorded neuronal activity contains spikes superimposed on local field potentials (LFPs). With a proper filter, spiking activity can be separated from the LFP. Correlated activities of the spikes and synchronizations of the LFPs recorded by multichannel electrodes have been reported in cat early visual cortex, but the neural mechanisms underlying these correlations and the synchronizations are not well understood. In the present study, multichannel recording electrodes were placed in the cat early visual cortex, and both neuronal spikes and LFPs were recorded in order to investigate their correlative activity and synchronization. Areas 17 and 18, which comprise the cat early visual cortex, were identified by using optical imaging based on intrinsic signals, according to the difference of their preferred spatial frequencies before the electrophysiological recording. The optimal spatial frequency stimuli for areas 17 and 18 were presented during the electrophysiological experiment. The correlation and synchronization of neuronal activities in different sites were evaluated by using cross-correlograms (CCGs) for the spiking activity between the cells, and phase-locking values (PLVs) for the LFPs between the cortical sites. The CCGs were larger in the pairs separated within 200µm than the pairs separated over 200µm. The main effects of the preferred orientations and the overlap in the receptive field were significant for the CCGs in pairs separated over 200µm, suggesting the importance of relatively long-range horizontal connections on spiking activities. The PLV showed two peaks in the early and late phases of the responses. Both peaks decreased with increased separation of the recording sites and the difference of the preferred orientations. Significant main effects of the separation of the recording sites and the difference of the preferred orientations were found in both peaks, but an interaction effect was significant only in the late phase. The PLV in the late phase may contain information that combines the site separation and their preferred orientations, while the PLV in the early phase may not contain the interaction information.

収録刊行物

  • 生体医工学

    生体医工学 52 (6), 288-295, 2014

    公益社団法人 日本生体医工学会

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ