Scapular dyskinesia is a term used to describe abnormal or altered movement, position, and control of the scapula — commonly known as the shoulder blade — during arm and shoulder movements. The word dyskinesia is derived from the Greek meaning abnormal movement, and in the context of shoulder function, it refers to any observable deviation from the normal, coordinated pattern of scapular motion that is essential for healthy, pain-free shoulder movement.

The scapula is a flat, triangular bone that sits against the posterior thoracic cage — the back of the ribcage — and serves as the critical link between the arm and the trunk. It is not directly attached to the thorax by any bony joint but is held in place and controlled entirely by a complex network of muscles — including the serratus anterior, trapezius, rhomboids, and levator scapulae — that must work in precise coordination to position the scapula correctly throughout the full range of arm movement.

In normal shoulder function, the scapula performs a carefully choreographed sequence of movements — including upward rotation, posterior tilting, and external rotation — as the arm is raised overhead. These movements are essential for maintaining the subacromial space — the gap between the top of the shoulder joint and the overlying acromion — and for positioning the glenoid fossa — the shallow cup-shaped surface on the scapula that forms the socket of the shoulder joint — optimally beneath the humeral head throughout arm elevation.

When the muscles controlling the scapula are weak, fatigued, inhibited, or imbalanced — or when the normal neuromuscular coordination between them is disrupted — the scapula fails to move correctly. It may wing away from the thorax, tip forward, translate excessively, or fail to rotate upward adequately during arm elevation. These movement abnormalities alter the mechanics of the entire shoulder complex — reducing the subacromial space, increasing the impingement risk, altering the length-tension relationship of the rotator cuff, and placing abnormal stress on the glenohumeral joint, acromioclavicular joint, and surrounding soft tissues.

Scapular dyskinesia is extremely common — identified in a high proportion of patients presenting with shoulder pain of any cause — and has been recognised as both a contributing factor to and a consequence of a wide range of shoulder conditions. At Active Life Physiotherapy, our specialist team provides comprehensive scapular dyskinesia treatment that addresses the underlying neuromuscular causes, corrects posture and movement patterns, and restores normal scapular function as part of a complete shoulder rehabilitation programme.