The Scapular Dyskinesis Test (SDT) is a specific test used to assess scapular movement and identify scapular dyskinesis.
This dynamic, visually-based assessment helps clinicians observe how the scapula moves during shoulder motions. Here's a breakdown of the test:
- Procedure: The patient performs repeated active shoulder flexion and abduction (raising the arm forward and to the side) while holding light weights (e.g., dumbbells).
- Observation: The clinician observes the scapulohumeral rhythm (the coordinated movement between the scapula and humerus) from behind the patient.
- Purpose: To identify any abnormal scapular movements, such as winging (protrusion of the medial border of the scapula), tipping (inferior angle of the scapula tilting away from the rib cage), or asymmetrical movements.
The SDT is a subjective test, relying on the clinician's visual assessment. Therefore, experience and a keen eye are vital for accurate interpretation. It's crucial to combine the findings of the SDT with other clinical findings, such as patient history, palpation, and range of motion assessments, for a comprehensive diagnosis. Other tests that may be used to assess scapular function include the Scapular Assistance Test (SAT) and the Scapular Retraction Test (SRT), though the SDT is more commonly used as a screening tool.
