Use of Visual Evoke Potential’s  in Pallidal surgery for secondary dystonia in children.
Milind Sankhe, Vrajesh Udani, Charulata Sankla.

Departments of Neurosurgery, Neurology and Pediatric Neurology, P. D. Hinduja National hospital, Mumbai. India.

Pallidal surgery for dystonia has been yielding good results particularly in patients with primary dystonia. Attempts to treat secondary dystonia have yielded less but equally significant benefits. Procedures for dystonia are difficult under local anesthesia and usually general anesthesia is needed. Electrophysiological localization of the optic tract is difficult under general anesthesia but possible. We share our experience of performing eight procedures using visual evoke potentials on six children of secondary dystonia and discuss the technique, VEP observations, protocols and outcome.