The Shoulder GirdleChapter 4
Bones
1. Clavicle2. Scapula3. Sternum*
Scapula
1. coracoid process,2. acromion process,3. glenoid fossa,4. lateral border,5. inferior angle,6. medial border,7. superior angle,8. spine of the scapula9. subscapular fossa10. supraspinous fossa11. infraspinous fossa
Shoulder Girdle Joints
Sternoclavicular Joint
arthrodial (gliding)
Acromioclavicular Joint
arthrodial (gliding)
Sacpulothoracic Joint
Shoulder Girdle Actions
The clavicle and scapula move as a unit
Most of the movement occurs at the SC joint
Abduction / Adduction
Also called Protraction / Retraction
Transverse plane, Vertical axis
Downward Rotation / Upward Rotation
Frontal plane, Sagittal axis
Depression / Elevation
Frontal plane, Sagittal axis
Summary of Shoulder Girdle Actions
ElevationElevation
DepressionDepression
AbductionAbductionAdductionAdduction
Skull
Abduction / Adduction
Abduction of the AC joint = Horizontal adduction or flexion of the shoulder joint
Adduction of the AC joint = Horizontal abduction or extension of the shoulder joint
Downward Rotation / Upward Rotation
Downard rotation of the AC joint = Adduction of the shoulder joint
Upward rotation of the AC joint = Abduction of the shoulder joint