The Shoulder Complex Shoulder Girdle MCCC（复杂的肩膀肩带MCCC）.pdf

The Shoulder Complex Shoulder Girdle The shoulder complex • 4 articulations involving The sternum The clavicle The ribs The scapula and The humerus •necessary for stability, support, protection, locomotion, production of nutrients With Without Bony Landmarks provide attachment points for muscles and ligaments • In essence, they provide the “direction” (Axillary) (Vertebral) Scapula (Dorsal aspect) (Axillary) (Vertebral) Medial Lateral (Posterior aspect) Intertubercular groove (Bicepital groove) Intertubercular Groove (bicepital groove) Anatomical Neck Deltoid Tuberosity Sternoclavicular- • The ONLY bony attachment of the upper extremity to the axial skeleton Scapulothoracic Acromioclavicular Glenohumoral Kinematics • Saddle joint permitting the clavicle to move in all 3 planes A fused SC would limit all shoulder motion! • Permits Elevation Depression Protraction Retraction Axial Rotation  Motion between the scapula rib cage • Elevation Depression The scapula must be able to slide over the rib cage • Protraction Retraction The scapula must be able to move medially and laterally around the rib cage • Upward and Downward Rotation  In the glenoid fossa… Their scapulae are protracted… The inferior ang