Relating to or characterized by spasm. "Spastic paralysis is a spastic form of cerebral palsy"
2.
Suffering from spastic paralysis.
3.
Affected by involuntary jerky muscular contractions; resembling a spasm. Synonyms:convulsive, spasmodic."His body made a spasmodic jerk" , "Spastic movements"
... symmetrical on the two sides. There is no evidence of paralysis of the facial muscles. In fact, the cranial nerves, by detailed examination, are intact, except in so far as respiration and speech are concerned. The right leg is held entirely spastic, the muscles on both sides of the joints, that is, flexors and extensors, being equally contracted. It is impossible to bend this leg at any joint except by the use of very great force. The reflexes everywhere are lively but are ... — The Journal of Abnormal Psychology - Volume 10