Medical Definition of Spasm
Spasm: A brief, automatic jerking movement. A muscle spasm can be quite painful, with the muscle clenching tightly. A spasm of the coronary artery can cause the pain of angina. Spasms in various types of tissue may be caused by stress, medication, and overexercise.Source: MedTerms™ Medical Dictionary
Last Editorial Review: 1/25/2017
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