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Definition of Focal motor seizure

Focal motor seizure: A simple partial seizure with localized motor activity. There may be spasm or clonus (jerking) of one muscle or a muscle group and this may remain localized or it may subsequently spread to adjacent muscles as a Jacksonian seizure.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=32972
Last Editorial Review: 6/14/2012

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