Stimulus dependence of directed information exchange between cortical layers in macaque V1.
Stimulus dependence of directed information exchange between cortical layers in macaque V1.
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DOI：
10.7554/elife.62949
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发表时间：
2022-03-11
期刊：
影响因子：
7.7
通讯作者：
Thiele A
中科院分区：
文献类型：
--
作者：
Gieselmann MA;Thiele A
感知和认知需要前馈感觉信息与反馈信号的整合。使用不同大小的刺激，我们隔离前馈和反馈信号的光谱特征，以及它们对雄性猕猴初级视觉皮层层间通信的影响。小的刺激引起伽玛频率振荡主要在表层。这些Granger因果起源于上层4和较低的颗粒上层。出乎意料的是，大的刺激产生强烈的窄带伽马振荡活动的皮层层。他们格兰杰因果地出现在第5层，通过第6层传达到表层，并违反现有的反馈光谱特征模型。同样令人惊讶的是，与大的刺激，α带振荡活动主要出现在颗粒和颗粒上的层，并在前馈方向沟通。因此，特定频带中的振荡被动态调制以用于反馈和前馈通信，并且不限于V1中的特定皮层。
Perception and cognition require the integration of feedforward sensory information with feedback signals. Using different sized stimuli, we isolate spectral signatures of feedforward and feedback signals, and their effect on communication between layers in primary visual cortex of male macaque monkeys. Small stimuli elicited gamma frequency oscillations predominantly in the superficial layers. These Granger-causally originated in upper layer 4 and lower supragranular layers. Unexpectedly, large stimuli generated strong narrow band gamma oscillatory activity across cortical layers. They Granger-causally arose in layer 5, were conveyed through layer six to superficial layers, and violated existing models of feedback spectral signatures. Equally surprising, with large stimuli, alpha band oscillatory activity arose predominantly in granular and supragranular layers and communicated in a feedforward direction. Thus, oscillations in specific frequency bands are dynamically modulated to serve feedback and feedforward communication and are not restricted to specific cortical layers in V1.