Question

Involuntary rhythmic muscular contraction and relaxation is known as

Answer 1

Involuntary rhythmic muscular contraction and relaxation is known as TREMOR.........


A tremor is an involuntary, somewhat rhythmic, muscle contraction and relaxation involving oscillations or twitching movements of one or more body parts. It is the most common of all involuntary movements and can affect the hands, arms, eyes, face, head, vocal folds, trunk, and legs.......



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Answer 2

An 'involuntary rhythmic muscular contraction' and 'relaxation' is known as tremor.

EXPLANATION:

Tremor is the twitching movement or oscillations in different body parts.  Tremor is the most common of involuntary movements that can be felt in the eyes, hands, legs, head and arms.

Tremor may be triggered when the body is exhausted or when a person is under stress. Tremors can also occur because of certain posture or movement of the body parts.