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

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In which joint is the "Piano Keys" Test performed?

Distal Radioulnar Joint
Proximal Radioulnar Joint
Carpometacarpal Joint
Interphalangeal Joint

The correct answer is: Distal Radioulnar Joint

The "Piano Keys" Test is performed at the distal radioulnar joint. This test is specifically designed to assess for instability or injury in this joint, often associated with conditions such as wrist sprains or dislocations. In a clinical setting, the test involves stabilizing the radius and attempting to move the ulnar head in a manner that mimics the motion of a piano key, where the movement should elicit pain or looseness if there is an underlying issue. The distal radioulnar joint is crucial for proper forearm movement, and any dysfunction can significantly impact grip strength and wrist function. The other joints listed—proximal radioulnar, carpometacarpal, and interphalangeal—are not assessed with the "Piano Keys" Test as they have different anatomical and functional roles in the upper extremity. Understanding these specific joints and their assessments is essential for recognizing how various tests relate to diagnosing injuries and conditions effectively.