Plane of the Scapula.

The anatomical motions of the shoulder through the frontal, horizontal and sagittal planes are flexion, extension, abduction, adduction and internal and external rotation.

However the scapula is orientated at 30° to 45° anterior to the frontal plane so that the glenoid fossa faces somewhat anteriorly rather than laterally.

This “plane of the scapula” determines the planes of the clinical test movements.

In this plane, the inferior glenohumeral capsular ligament is not twisted, and the supraspinatus and deltoid are optimally aligned to elevate the arm.

All these movements depend on the stabilizing work of the Scapular Stabilising muscles.

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For good shoulder function you need a Good Posture and Good Exercise Programs!