Answer: fasciculations

AnswerCrossword Clue
fasciculationsA brief, spontaneous contraction affecting a small number of muscle fibers, often causing a flicker of movement under the skin. It can be a symptom of disease of the motor neurons
fasciculationsFASCICULATION, muscular twitching involving the simultaneous contraction of contiguous groups of muscle fibers
fasciculationsArrangement in bundles