结果：人类颈7神经根含运动纤维约8893根，其中前股3010根，后股5883根；
Results: There were about 8893 motor fibers in C7, 3010 and 5883 in anterior and posterior division respectively.
目的：通过选择性切断脊神经前根和后根观察单纯运动神经或感觉神经损伤对骨代谢影响的病理特征。
Objective: to observe and analyze the effect of selective radicotomy on the bone structural changes by selective anterior rhizotomy and the posterior rhizotomy.
神经根压迫也能明确诊断，运动员的神经根压迫多为椎间盘脱出症。
It is usually also possible to make a definitive diagnosis in those athletes presenting with nerve root compression who is usually due to herniated o intervertebral disk.
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