猫初级视觉皮层中方向选择性与低伽马和高伽马频段功率之间的相互作用。
Interplay of orientation selectivity and the power of low- and high-gamma bands in the cat primary visual cortex.
作者信息
Bharmauria Vishal, Bachatene Lyes, Ouelhazi Afef, Cattan Sarah, Chanauria Nayan, Etindele-Sosso Faustin Armel, Rouat Jean, Molotchnikoff Stéphane
机构信息
Neurophysiology of Visual System, Université de Montréal, Département de Sciences Biologiques, Montréal, QC, Canada.
Neurophysiology of Visual System, Université de Montréal, Département de Sciences Biologiques, Montréal, QC, Canada; Département de Génie Électrique et Génie Informatique, Université de Sherbrooke, Sherbrooke, QC, Canada.
出版信息
Neurosci Lett. 2016 May 4;620:14-9. doi: 10.1016/j.neulet.2016.03.033. Epub 2016 Mar 23.
Gamma oscillations are ubiquitous in brain and are believed to be inevitable for information processing in brain. Here, we report that distinct bands (low, 30-40Hz and high gamma, 60-80Hz) of stimulus-triggered gamma oscillations are systematically linked to the orientation selectivity index (OSI) of neurons in the cat primary visual cortex. The gamma-power is high for the highly selective neurons in the low-gamma band, whereas it is high for the broadly selective neurons in the high-gamma band. We suggest that the low-gamma band is principally implicated in feed-forward excitatory flow, whereas the high-gamma band governs the flow of this excitation.
伽马振荡在大脑中普遍存在，并且被认为是大脑信息处理过程中不可或缺的。在此，我们报告，刺激诱发的伽马振荡的不同频段（低频，30 - 40赫兹；高频伽马，60 - 80赫兹）与猫初级视觉皮层中神经元的方向选择性指数（OSI）存在系统性关联。对于低伽马频段中高选择性的神经元，伽马功率较高；而对于高伽马频段中宽泛选择性的神经元，伽马功率也较高。我们认为，低伽马频段主要涉及前馈兴奋性信息流，而高伽马频段则控制这种兴奋的流动。
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