College of Massage Therapists of British Columbia (CMTBC) Practice Exam

What nerve is evaluated during the Reverse Phalen's Test?

1. Radial Nerve

2. Ulnar Nerve

3. Median Nerve

4. Musculocutaneous Nerve

The correct answer is: Median Nerve

The Reverse Phalen's Test is specifically designed to assess the function of the median nerve. This test involves the patient bringing their wrists into a position of extension, typically by placing the back of their hands together with fingers pointed downward for an extended period. This position can exacerbate symptoms of conditions like carpal tunnel syndrome, which is directly related to median nerve compression at the wrist. When the median nerve is compressed, individuals may experience tingling, numbness, or pain in the hand, particularly affecting the thumb, index, middle fingers, and part of the ring finger. The Reverse Phalen's Test is an effective clinical tool for identifying impairments associated with this nerve, making it a reliable indicator of median nerve function and any potential pathologies affecting it. The radial, ulnar, and musculocutaneous nerves serve different areas and functions in the upper limb and are not directly evaluated during this specific test. Each of these nerves has distinct roles: the radial nerve primarily affects wrist extension and sensation in the back of the hand; the ulnar nerve impacts the little finger and part of the ring finger; and the musculocutaneous nerve serves the muscles in the front of the arm. However, none of these nerves are the primary