This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
A twitch of motor unit is called: 
Select and explain. 
A. Myoclonic jerk, B. Tremor, C. Fasciculation, D. Chorea
C: Fasciculation
Answer: C: Fasciculation 
Explanation: Fasciculations are jerky, visible contractions of groups of muscle fibers that occur as a result of pathologic discharge of spinal motor neurons.
Reference: Ganong’s Review of Medical Physiology 25 Ed page no 110​