Single-cell responses in the ectostriatum of the zebra finch
Single-cell responses in the ectostriatum of the zebra finch
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斑胸草雀外纹状体的单细胞反应
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
H. Bischof
中科院分区：
文献类型：
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作者：
J. Engelage;H. Bischof
研究了斑胸草雀（Taeniopygia guttata）的外纹状体和相邻新纹状体中单细胞对计算机生成的斑点、条形、栅格和深度运动刺激的反应。外纹状体与新纹状体在神经元特性上未见差异。外纹状体神经元的接受野很大，经常延伸到对侧眼睛的整个视野，并且有奇怪的边界。感受野的中心位于中央凹区，通常比周围产生更好的反应，并表现出不同的细分。神经元对移动的条形物有选择性地做出反应，它们更喜欢与最长轴平行的条形物。对正弦光栅响应的SDO（灵敏度、方向、方向）分析表明，所有方向都由外纹状体神经元代表，而对向前和向上运动有轻微的偏好。神经元也表现出对特定空间频率的栅格的偏好，并对移动到眼睛的刺激（“隐现”）做出强烈反应。我们的研究结果表明，外纹状体既参与检测周围位移，也参与刺激识别。通过与哺乳动物纹状体外皮层的研究结果对比，我们的研究结果支持了我们在生物学基础上提出的外纹状体与哺乳动物纹状体外皮层的同源性。
The responses of single cells to computer-generated spots, bars, gratings, and motion-in-depth stimuli were studied in the ectostriatum and the adjacent neostriatum of the zebra finch, Taeniopygia guttata. No differences in neuronal properties could be detected between ectostriatum and neostriatum. The receptive fields of ectostriatal neurons are large, often extending over the entire visual field of the contralateral eye, and have oddly defined borders. The centers of the receptive fields, located in the foveal region, generally yielded better responses than the periphery, and exhibited different subdivisions. Neurons responded selectively to moving bars, preferring those moving parallel to their longest axis. An SDO (sensitivity, direction, orientation) analysis of responses to sinusoidal gratings showed that all orientations were equally represented by ectostriatal neurons, while there was a slight preference for forward and upward movements. The neurons also showed preferences for gratings of a particular spatial frequency, and responded vigorously to stimuli moving towards the eye (“looming”). Our results indicate that the ectostriatum is involved in both detecting displacement of the surround and in stimulus identification. By comparison with results obtained in the extrastriate cortex of mammals, it is concluded that the homology of the ectostriatum with the extrastriate cortex of mammals, which was proposed on the basis of hodological findings, is supported by our study.