AIM: To study the connections between the left and right spinal ganglion neurons in rats, in order to search the basic morphological rules for the electrophysiological phenomenon: reciprocal innervation of the bilateral spinal ganglion ( dorsal root ganglion) neurons. 目的:观察大鼠左右侧脊神经节之间的纤维联系,以寻找两侧脊神经节(背根节)的神经元交互支配这一电生理学现象的形态学基础。