猫视网膜神经节细胞：感受野中心的大小和形状。
Cat retinal ganglion cells: size and shape of receptive field centres.
作者信息
Hammond P
出版信息
J Physiol. 1974 Oct;242(1):99-118. doi: 10.1113/jphysiol.1974.sp010696.
Abstract
- Receptive field centres of 144 sustained and transient retinal ganglion cells were mapped in cats under light pentobarbitone anaesthesia.2. Sustained on-centre, sustained off-centre, transient on-centre and transient off-centre cells had different mean sizes of receptive field centre, with some overlap between their distributions.3. For each class of cell, central fields had the smallest field-centres; progressively larger field-centres were encountered more peripherally.4. All classes of ganglion cells tended to have slightly elliptical receptive field centres. Major axes of over half of all receptive fields were oriented within 20 degrees of horizontal. These trends were independent of pupil dimensions, or of receptive field eccentricity or position in the visual field. The results almost certainly reflect asymmetry in retinal wiring.5. Two cells of thirty-nine tested were sensitive to axis of motion; in both cases the preferred and major axis were horizontal. A further cell was orientation specific.
摘要
在浅戊巴比妥麻醉下，对猫的144个持续性和瞬态性视网膜神经节细胞的感受野中心进行了测绘。
持续性中心兴奋、持续性中心抑制、瞬态性中心兴奋和瞬态性中心抑制细胞的感受野中心平均大小不同，其分布存在一些重叠。
对于每一类细胞，中央视野的视野中心最小；越往周边，视野中心逐渐变大。
所有类型的神经节细胞的感受野中心都倾向于略呈椭圆形。超过半数的感受野的长轴与水平方向的夹角在20度以内。这些趋势与瞳孔大小、感受野偏心率或视野中的位置无关。结果几乎肯定反映了视网膜布线的不对称性。
在测试的39个细胞中，有两个对运动轴敏感；在这两种情况下，偏好轴和长轴都是水平的。另有一个细胞具有方向特异性。
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