This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
Inability to perform rapid alternating repeated movements is 
Select and explain. 
A. Past pointing, B. Dysdiadochokinesia, C. Dysmetria, D. Dykinesia
B: Dysdiadochokinesia
Answer: B: Dysdiadochokinesia 
Explanation: Inability to perform rapid alternating repeated movements is dysdiadochokinesia Ref: Ganong 25th ed/page 251