Intraoperative mapping in C4 to Th1 nerve roots on Cervical Microsurgical DREZotomy of Patients with Pain from Brachial Plexus Injury: Practical Implications

OBJECTIVE: Cervical Microsurgical DREZotomy (MDT) aims to relieve neuropathic pain in patients with brachial plexus injury by destroying the nociceptive neural structures and the hyperactive neurons in the dorsal horn. Useful information can be harvested by intraoperative mapping and testing of cervical C4–Th1 roots. METHODS: 18 patients with intractable pain due to brachial plexus injury underwent cervical MDT. 216 roots were tested (6 ventral and 6 dorsal roots for each patient).