A<unk>  (or "muscle twitch") is a small, local, involuntary muscle contraction (twitching) visible under the skin arising from the spontaneous discharge of a bundle of skeletal muscle fibers.<unk> s have a variety of causes, the majority of which are benign, but can also be due to disease of the motor neurons.
Fasciculation
Neuromyotonia
Autonomic dysreflexia
Neuroglycopenia
Paraesthesia
Spinal autonomic dysreflexia
Paralysis
Plasticity