| muscle spasm | | |
| n. (state) | 1. cramp, muscle spasm, spasm | a painful and involuntary muscular contraction. |
| ~ symptom | (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease. |
| ~ charley-horse, charley horse | a muscular cramp (especially in the thigh or calf) following vigorous exercise. |
| ~ graphospasm, writer's cramp | muscular spasms of thumb and forefinger while writing with a pen or pencil. |
| ~ blepharospasm | spasm of the eyelid muscle resulting in closure of the eye. |
| ~ crick, kink, rick, wrick | a painful muscle spasm especially in the neck or back (`rick' and `wrick' are British). |
| ~ myoclonus | a clonic spasm of a muscle or muscle group. |
| ~ opisthotonos | severe spasm in which the back arches and the head bends back and heels flex toward the back. |
| ~ twitch, twitching, vellication | a sudden muscle spasm; especially one caused by a nervous condition. |
| ~ tenesmus | painful spasm of the anal sphincter along with an urgent desire to defecate without the significant production of feces; associated with irritable bowel syndrome. |
| ~ trismus | prolonged spasm of the jaw muscles. |
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