Pectoral Girdle & Glenohumeral Joint Summary

Pectoral Girdle Overview

• Composed of the clavicle and scapula.
• Connects upper limb to the sternum (axial skeleton).
• Right and left girdles operate independently.

Pectoral Girdle Joints

• Sternoclavicular Joint: Connects clavicle to sternum.
• Acromioclavicular Joint: Connects clavicle to acromion of scapula.

Sternoclavicular Joint

• Articulation between sternal end of clavicle and clavicular notch of sternum (manubrium).
• Only joint connecting upper limb to axial skeleton.
• Stabilized by ligaments and an articular disc.

Ligaments of Sternoclavicular Joint

• Anterior Sternoclavicular Ligament: Front of sternal end of clavicle to superior manubrium.
• Costoclavicular Ligament: From rib's cartilage to inferior clavicle.
• Interclavicular Ligament: Joins the two clavicles above the sternum.