These results indicate that GABABR-LI terminals in the spinal dorsal horn originate from peripheral afferent fibers, supraspinal structures and interneurons within the spinal dorsal horn.

• 说明背角浅层内的GABABR-LI终末分别来自外周初级传入、脊髓以上的脑结构和背角浅层内的中间神经元。