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Sound-Driven Synaptic Inhibition in Primary Visual Cortex
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DOI：10.1016/j.neuron.2011.12.026.png)
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摘要
En 中文
Multimodal objects and events activate many sensory cortical areas simultaneously. This is possibly reflected in reciprocal modulations of neuronal activity, even at the level of primary cortical areas. However, the synaptic character of these interareal interactions, and their impact on synaptic and behavioral sensory responses are unclear. Here, we found that activation of auditory cortex by a noise burst drove local GABAergic inhibition on supragranular pyramids of the mouse primary visual cortex, via cortico-cortical connections. This inhibition was generated by sound-driven excitation of a limited number of cells in infragranular visual cortical neurons. Consequently, visually driven synaptic and spike responses were reduced upon bimodal stimulation. Also, acoustic stimulation suppressed conditioned behavioral responses to a dim flash, an effect that was prevented by acute blockade of GABAergic transmission in visual cortex. Thus, auditory cortex activation by salient stimuli degrades potentially distracting sensory processing in visual cortex by recruiting local, translaminar, inhibitory circuits.
Keyword:
NORMALIZATION MODEL
MULTISENSORY INTEGRATION
NEURONAL OSCILLATIONS
CORTICAL-NEURONS
BARREL CORTEX
RESPONSES
MODULATION
CELLS
INPUT
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IF:
15
论文数:
1.4W
被引数:
9.9W
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Crossmodal binding through neural coherence: implications for multisensory processing通过神经相干性进行跨模态结合: 对多感官处理的影响.png)
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