单眼视觉剥夺猫外膝体神经元的双眼反应特性

采用在位（ｉｎ ｖｉｖｏ） 胞内记录技术，研究了单眼视觉剥夺猫外膝体（ＬＧＮ） 神经元的双眼反应特性（ｂｉｎｏｃｕｌａｒｉｔｙ） ， 结果发现单眼剥夺猫外膝体几乎所有的双眼反应神经元都对非优势眼的闪烁光斑刺激有不同程度的反应，并且剥夺层和非剥夺层神经元在反应特性上没有明显差异。但是，与非剥夺层神经元相比，几乎没有剥夺层的神经元能对非优势眼的正弦移动光栅刺激起反应，并受其空间频率的调制。结果提示皮层下外膝体水平上这种双眼反应的某些精细反应性质可能与后天视觉经验的修饰有关，并可能受皮层反馈输入的影响。

BINOCULAR RESPONSE PROPERTIES OF THE DORSAL LATERALGENICULAR NUCLEUS NEURONS IN THE MONOCULAREYELID SUTURED CATS

Using in vivo intracellular recording technique, we studied the binocularity of the dorsal lateral geniculate nucleus (LGNd) neurons in the monocular eyelid sutured cats. We found that almost all the neurons responded to the flashing spots to the nondominant eyes, and there was no significant difference of the response properties between the neurons in the deprived and non-deprived layers. Almost no neurons in the deprived layers responded to the drifting sinusoidal gratings to the nondominant eyes, while half of the neurons in the non-deprived layers did. The results suggests that visual experience may be responsible for some fine response properties (such as responses to drifting grating) of binocular neurons in the LGNd, and these properties may reflect the cortical feedback.