Uozumi T, Tsuji S, Sasaki M, Ito Y, Murai Y
Rinsho Shinkeigaku. 1989 May;29(5):558-62.
Somatosensory evoked potentials (SEPs) to posterior tibial nerve (PTN) and median nerve (MN) stimulations were recorded in 30 patients with cervical spondylotic myelopathy. Measurements performed include N20-P2 interpeak latency (IPL) for PTN-SEPs, EP-N13 IPL and EP-N20 IPL for MN-SEPs. Limits of normal IPL were defined by the mean + 3S.D. of the normal control group. PTN-SEPs was more sensitive (with 73.3% abnormal) than MN-SEPs (with 33.3% abnormal) and strongly correlated with the clinical signs of posterior column, but not with those of anterolateral column indicated by superficial sensory disturbances and spasticity of lower limbs. Severities of cord compression (sagital diameter/transverse diameter ratio) calculated from the picture of metrizamide CT were not correlated with SEPs findings and clinical signs. In patients with cervical myelopathy, SEPs, especially PTN-SEPs, were thought to be very useful examination.
对30例脊髓型颈椎病患者记录了胫后神经（PTN）和正中神经（MN）刺激的体感诱发电位（SEP）。所进行的测量包括PTN-SEP的N20-P2峰间潜伏期（IPL）、MN-SEP的EP-N13 IPL和EP-N20 IPL。正常IPL的界限由正常对照组的均值+3标准差定义。PTN-SEP比MN-SEP更敏感（异常率为73.3%），而MN-SEP的异常率为33.3%，且PTN-SEP与后柱的临床体征密切相关，但与由浅感觉障碍和下肢痉挛所提示的前外侧柱的临床体征无关。根据甲泛葡胺CT图像计算的脊髓压迫严重程度（矢状径/横径比值）与SEP结果及临床体征无关。在脊髓型颈椎病患者中，SEP，尤其是PTN-SEP，被认为是非常有用的检查。
