Manzano G, McComas A J
Department of Medicine, McMaster University, Hamilton, Ont., Canada.
Muscle Nerve. 1988 Nov;11(11):1115-22. doi: 10.1002/mus.880111103.
The possibility of a topographic relationship between the spinal cord and the longitudinal axis of a muscle has been explored in two mammalian hamstring muscles: the rat semitendinosus (ST) and biceps femoris (BF). In both muscles the fibers did not extend the full length of the respective muscle bellies but were arranged in longitudinal arrays. There were two such arrays in BF and three in ST; monopolar recordings revealed that each array had a transverse band of endplates extending across the middle part. By stimulating ventral nerve roots in the lumbosacral outflow, it was found that L5 made the greatest contribution to the innervation of both ST and BF, with lesser inputs coming from adjacent roots. In neither ST or BF was there any evidence of a topographic relationship between the spinal cord and the muscle belly.
大鼠半腱肌（ST）和股二头肌（BF）。在这两种肌肉中，纤维并未延伸至各自肌腹的全长，而是呈纵向排列。BF中有两个这样的排列，ST中有三个；单极记录显示，每个排列都有一条横跨中部的终板横向带。通过刺激腰骶部传出神经的腹侧神经根，发现L5对ST和BF的神经支配贡献最大，相邻神经根的输入较少。在ST和BF中，均未发现脊髓与肌腹之间存在地形关系的任何证据。
