Similarity of direction tuning among responses to stimulation of different whiskers in neurons of rat barrel cortex
Similarity of direction tuning among responses to stimulation of different whiskers in neurons of rat barrel cortex
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DOI：
10.1152/jn.00113.2004
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发表时间：
2005-09-01
影响因子：
2.5
通讯作者：
Sato, H
中科院分区：
文献类型：
--
作者：
Kida, H;Shimegi, S;Sato, H
大鼠桶状皮层细胞表现出刺激特异性反应特性。为了了解方向选择性的网络机制，在应对面部胡须偏转，我们研究了方向选择性的神经元反应，单和多胡须刺激。对于常规峰值单位，即，假定的兴奋性细胞，方向偏好是非常相似的反应之间的单一晶须刺激的主要和相邻的胡须。在短（= 6 ms）的多须刺激中，ISI引起对第二刺激的反应的非方向选择性抑制。在快速尖峰单元的情况下，即，推定的抑制细胞，表现出差的方向选择性。因此，刺激方向被表示为方向选择性反应的单须和多须刺激的假定兴奋细胞，而不是那些假定抑制细胞。
Cells in the rat barrel cortex exhibit stimulus-specific response properties. To understand the network mechanism of direction selectivity in response to facial whisker deflection, we examined direction selectivity of neuronal responses to single- and multiwhisker stimulations. In the case of regular-spiking units, i.e., putative excitatory cells, direction preferences were quite similar between responses to single- whisker stimulation of the principal and adjacent whiskers. In multiwhisker stimulation at short ( = 6 ms) ISIs caused non - direction-selective suppression of the response to the second stimulus. In the case of fast-spiking units, i.e., putative inhibitory cells, poor direction selectivity was exhibited. Thus stimulus direction is represented as the direction-selective responses to the single- and multiwhisker stimulations of putative excitatory cells rather than those of putative inhibitory cells.