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
Twitch of a single motor unit is called : 
Select and explain. 
A. Myoclonic-jerk, B. Fasciculation, C. Tremor, D. Chorea
B: Fasciculation
Answer: B: Fasciculation 
Explanation: B i.e. Fasciculation Fasciculation is visible or palpable twitch within a single muscle due to spontaneous discharge of one motor unit.Q Fibrillation Fine, irregular contraction of individual fibers, they are not visible grossly. Tremor Rhythmic abnormal involuntary movement. Chorea Rapid, jerky, semipurposive irregular movement more commonly occurring in the distal pa.