What is the method for testing scapular (shoulder blade) dyskinesis (abnormal movement)?

To test for scapular dyskinesis, observe the patient's scapular movement during active arm elevation and lowering in both frontal and scapular planes. Have the patient perform 5-10 repetitions of slow, controlled shoulder flexion and abduction while standing with arms at sides. Watch for abnormal scapular movement patterns including winging (medial border prominence), inferior angle prominence, or early scapular elevation. The Scapular Dyskinesis Test (SDT) is commonly used, where movement is rated as normal, subtle abnormality, or obvious abnormality. You can also use the SICK scapula rating scale (Scapular malposition, Inferior medial border prominence, Coracoid pain and malposition, and dysKinesis) to quantify severity. Palpation of the scapular stabilizing muscles during movement can reveal weakness or poor activation patterns. These tests are important because scapular dyskinesis disrupts normal shoulder biomechanics and can contribute to various shoulder pathologies including impingement syndrome, rotator cuff disorders, and glenohumeral instability. Proper scapular function is essential for optimal shoulder movement and function.