Parvalbumin-expressing interneurons linearly transform cortical responses to visual stimuli.

Parvalbumin-expressing interneurons linearly transform cortical responses to visual stimuli.
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DOI:
10.1016/j.neuron.2011.12.013
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发表时间:
2012-01-12
期刊:
影响因子:
16.2
通讯作者:
Scanziani M
Scanziani M
中科院分区:
医学1区
文献类型:
--
作者:
Atallah BV;Bruns W;Carandini M;Scanziani M

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皮质神经元对感觉刺激的反应是由它们嵌入的网络塑造的。在这里,我们建立了表达细胞(PV)表达细胞的作用,这是靶向锥体细胞的soma和perisasic室的大量抑制性神经元,在控制皮质反应中。通过双向操纵视觉皮层中的PV细胞活性,我们表明这些神经元强烈调节对视觉刺激的2/3锥体细胞尖峰响应,同时仅对其调谐特性进行适度的调整。 PV细胞对锥体细胞的影响是通过带有阈值的添加剂和乘法的线性转换来捕获的。这些结果表明,PV细胞非常适合调节皮质增益,并在选择性神经元类型与皮质进行的特定计算之间建立因果关系。
The response of cortical neurons to a sensory stimulus is shaped by the network in which they are embedded. Here we establish a role of parvalbumin (PV)-expressing cells, a large class of inhibitory neurons that target the soma and perisomatic compartments of pyramidal cells, in controlling cortical responses. By bidirectionally manipulating PV cell activity in visual cortex we show that these neurons strongly modulate layer 2/3 pyramidal cell spiking responses to visual stimuli while only modestly affecting their tuning properties. PV cells' impact on pyramidal cells is captured by a linear transformation, both additive and multiplicative, with a threshold. These results indicate that PV cells are ideally suited to modulate cortical gain and establish a causal relationship between a select neuron type and specific computations performed by the cortex during sensory processing.
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