What is a 2-beat clonus?

What will be an ideal response?


A clonus is a form of involuntary muscle movement marked by rapid contraction and relaxation. Clonus is more pronounced than fasciculations. When testing a reflex, the "beat" is the number of times the muscle contracts and relaxes. A 2-beat clonus is a muscle reaction with two distinct contraction-relaxation cycles. When testing a reflex, several beats (contractions) of clonus is a sign of a neurological disorder.

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