Cambridge Encyclopedia :: Cambridge Encyclopedia Vol. 71
 

spasm

A sudden intense contraction of a muscle due to stimulation by the nerve that supplies it.

Portions of the summary below have been contributed by Wikipedia.
Name of Symptom/Sign:
Muscle spasm
Classifications and external resources
ICD-10 R25.2
ICD-9 728.85

A spasm is a sudden, involuntary contraction of a muscle, a group of muscles, or a hollow organ, or a similarly sudden contraction of an orifice.

A subtype of spasms is colic, an episodic pain due to spasms of smooth muscle in a particular organ (e.g.

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