relating to or characterized by abnormal involuntary muscle contractions (spasms);
e.g. This treatment is supposed to relax spastic muscles.
(adjective)
fitful or intermittent, acting or proceeding in a way that is not constant or continuous;
e.g. They worked in spastic bursts, alternating between intense work and long breaks.
(adjective)
relating to the kind of muscle weakness and/or stiffness seen in people with cerebral palsy, often involving difficulty in controlling muscle movements;
e.g. His legs became spastic, making him unable to walk.