Scapular Dyskinesis The scapula is the large triangular-shaped bone at the back of your shoulder frequently known as the shoulder blade. Its only attachment to the rest of the skeleton is through the collarbone at the acromioclavicular joint. Therefore, the bone is primarily held in place by the attached and surrounding muscles. Many muscles use the large area of the scapula for attachment and they enable the vast range of shoulder motion. At the outer edge of the scapula a shallow socket forms and is where the humeral head sits forming the shoulder joint (glenohumeral joint). Proper positioning and movement of the scapula is critical for full and normal shoulder range of motion. We use the acronym SICK (Scapular malposition, Inferior medial border prominence, Coracoid pain and malposition, and dysKinesis of scapular movement) to refer to an injury resulting from overuse and fatigue of the muscles that stabilize and provide motion for the scapula. A SICK scapula will result in Scapular Dyskinesis which is an alteration in the normal position or motion of the scapula during coupled scapulohumeral movements. It occurs in a large number of injuries involving the shoulder joint and often is caused by injuries that result in the inhibition or disorganization of activation patterns in scapular stabilizing muscles. It may increase the functional deficit associated with shoulder injury by altering the normal scapular role during coupled scapulohumeral motions. Scapular dyskinesis appears to be a nonspecific response to shoulder dysfunction because no specific pattern of dyskinesis is associated with a specific shoulder diagnosis. The majority of scapular dyskinesis cases are the result of loss of muscular coordination. The trapezius, rhomboid and serratus anterior muscles must be properly synchronized in their action for smooth scapular motion during arm movement. ipcphysicaltherapy/ScapularDyskinesis.aspx
Posted on: Sun, 07 Jul 2013 13:05:35 +0000
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