Parise M, Sindou M, Mertens P, Mauguière F
Department of Neurosurgery A, Hôpital Neurologique, Lyon, France.
Stereotact Funct Neurosurg. 1997;69(1-4 Pt 2):268-73. doi: 10.1159/000099886.
Ten children with cerebral palsy and severe lower limb spasticity were treated by functional posterior rhizotomy (FPR). Somatosensory evoked potential recordings were performed preoperatively, intraoperatively (directly on the surface of the spinal cord) and 6 months after surgery, to evaluate the effects of FPR on lower limb somatosensory function. Before surgery, 7/10 patients showed abnormal cortical responses after tibial stimulation. In all patients, intraoperative recordings showed a reduction in the amplitude of segmental responses (N22) (50 +/- 25% of reference value) after the section of a mean 50% of L2-S2 dorsal rootlets. The modifications of segmental responses (N22) were maintained 6 months after surgery, whereas reduction of cortical responses (P39) did not reach the significance level when compared with preoperative recordings.
十名患有脑瘫且下肢严重痉挛的儿童接受了功能性后根切断术（FPR）治疗。术前、术中（直接在脊髓表面）及术后6个月进行体感诱发电位记录，以评估FPR对下肢体感功能的影响。术前，10名患者中有7名在胫神经刺激后出现异常皮质反应。所有患者术中记录显示，在平均切断50%的L2 - S2背根小支后，节段性反应（N22）的波幅降低（为参考值的50±25%）。节段性反应（N22）的改变在术后6个月持续存在，而与术前记录相比，皮质反应（P39）的降低未达到显著水平。
