This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Elbow injuries, Subject name: Orthopaedics
A 21-year-old javelin thrower is diagnosed with a full-thickness ulnar collateral ligament (UCL) tear. On presentation, he complains of numbness and tingling in the ring and small fingers. Which muscle group would he be most likely to have motor weakness 
Select and explain. 
A. Brachioradialis, B. Extensor carpi ulnaris, C. Abductor digiti minimi, D. Palmaris longus
C: Abductor digiti minimi
Answer: C: Abductor digiti minimi 
Explanation: The patient is experiencing ulnar nerve paresthesias. If the patient had associated motor symptoms, they would manifest as weakness within the abductor digiti minimi. The other answer choices are muscles not innervated by the ulnar nerve.