The effect of T-myelotomy on spasticity.

Dorsal myelotomy with lateral extension (T-myelotomy) provided excellent relief from spasticity in the lower limbs in 12 patients. Averaged evoked potential recordings helped delineate the limits of the myelotomy and were useful for evaluation of injury to the dorsal columns. While preservation of any residual motor function is unlikely following T-myelotomy, the risk of permanent loss of preserved sensory, bladder or sexual functions is not great.