Felsenthal G, Reischer M A
Arch Phys Med Rehabil. 1982 Aug;63(8):377-8.
There is no commonly accepted reflex from L5 innervated muscles. Hamstring muscles are primarily innervated by the L5 and S1 roots. It is shown that in the presence of symmetrically active gastrocsoleus reflexes, asymmetry of the hamstring reflexes indicates an L5 root lesion. We describe a method for eliciting the medial hamstring reflex by percussing the conjoint tendon of the semitendinosus and biceps femoris muscles at the level of the ischial tuberosity. Electromyographic, myelographic, and operative data confirmed the presence of an L5 root lesion in 7 patients with asymmetric hamstring reflexes.
目前尚无普遍认可的由L5支配肌肉引出的反射。腘绳肌主要由L5和S1神经根支配。研究表明，在腓肠肌比目鱼肌反射对称活跃的情况下，腘绳肌反射不对称提示L5神经根病变。我们描述了一种通过叩击坐骨结节水平的半腱肌和股二头肌联合腱来引出内侧腘绳肌反射的方法。肌电图、脊髓造影和手术数据证实，7例腘绳肌反射不对称的患者存在L5神经根病变。
