Review Question - QID 1851

A 20-year-old college football quarterback reports a 5-month history of gradually increasing medial elbow pain that occurs with throwing. The pain occasionally refers distally along the ulnar aspect of the forearm. He denies any weakness; however, he notes occasional paresthesias on the volar and dorsal aspect of his small finger. A nerve conduction velocity study demonstrates only slightly increased latency across the cubital tunnel. What structure may be contributing to his symptoms?