مقايسه پتانسيل هاي فراخوانده حسي - پيكري در راديكولوپاتي هاي كمري - خاحي قبل و بعد از عمل جراحي

Background and Objectives: Somatosensory Evoked Potentials (SSEP) have been used in the evaluation of different aspects of radiculopathies. The purpose of this study was to investigate the changes of somatosensory evoked potentials in lumbosacral radiculopathies due to disk herniation before and after surgery. Materials and Methods: A prospective study was carried out in an electrodiagnostic Lab. on the 42 patients who were candidates for herniated disk surgery. SSEP was performed before surgery and 2 months later and the corresponding results were compared within two separate groups related to tibial and peroneal nerves. Results: Mean PI latency of tibia! nerveʹs SSEP in 25 patients before surgery was 44.28 ±2.47 after which became 41.68±2.22 (P<0.05).Mean PI latency of peroneal nerveʹs SSEP in 17 patiens before surgery was 37.93±2.57 and after that was 35±1.56 (P<0.05). These differences were significant. Conclusion: Conduction changes in radiculopathies of the herniated disk surgery are detectable by SSEP, after 2 months. This, compared with the presurgical SSEP testing, could yield an optimal follow - up program after surgical procedure. Remyelinization accounts for the essential improvement mechanism.