Archive The Occurrence of Extensor Spasm in Patients with Complete Transection of the Spinal Cord Authors: Martin B. Macht, Ph.D., M.D., and Robert A. Kuhn, M.D. Author Info & Affiliations ...

Spasticity results in involuntary contractions of synergistic muscles in the extremities, which are clinically manifested as flexor or extensor spasms (Mayer & Esquenazi, 2003; Meythaler, 2001).

Spasticity can occur when there’s damage to your brain, spinal cord, or the nerves that send signals back and forth. Learn more about this condition and what triggers it.