Visible twitching of a group of muscle fibers that can occur when the muscle is stimulated by tapping is called
a. fibrillation. c. spasm.
b. fasciculation. d. myoclonus.
B
Fasciculation, an involuntary muscle movement, is a visible twitching of a group of muscle fibers that can occur when the muscle is stimulated by tapping. Fibrillation is an ineffective, uncoordinated muscle contraction that resembles quivering. A spasm is a sudden muscle contraction. Myoclonus is a rapid, irregular contraction of a muscle or group of muscles, such as the type of jerking movement that occurs when drifting off to sleep.
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