Exam Master Neuro Practice Exam 2026 - Free Neuro Practice Questions and Study Guide

The presentation of numbness in the medial aspect of the right hand, along with mild weakness of the abductor digiti minimi, strongly indicates compressive ulnar neuropathy at the elbow. The ulnar nerve controls sensation in the medial part of the hand, particularly the little finger and the adjacent half of the ring finger, as well as motor functions in the intrinsic hand muscles, including the abductor digiti minimi, which is responsible for abduction of the little finger.

In this case, the symptoms align well with ulnar nerve involvement, particularly when compressed at the cubital tunnel, which is a common site where the nerve can become entrapped. Patients might experience numbness or tingling in the affected areas and may exhibit weakness in muscles innervated by the ulnar nerve.

Other potential conditions presented in the choices would not produce the same specific symptom profile. For example, carpal tunnel syndrome typically presents with symptoms in the median nerve distribution, affecting the thumb, index, and middle fingers. Radial nerve palsy primarily causes wrist drop due to loss of wrist extensors, which does not relate to the symptoms described. Median nerve entrapment also leads to distinct patterns of numbness and weakness focused around