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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Twitch of a single motor unit is called:
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The correct answer is  Fasciculations are jerky, visible contractions of groups of muscle fibers that occur as a result of pathologic discharge of spinal motor neurons. Fibrillations are fine, irregular contractions of individual muscle fibers. They may occur due to denervation hypersensitivity resulting from LMN lesion. Usually, the contractions are not visible grossly. Myoclonic jerk or clonus: Regular, rhythmic contractions of a muscle (entire muscle) subjected to sudden, maintained stretch. It is due to increased g-efferent discharge.