The Scapulothoracic Joint [+ Review of SC and AC Joints]

The video provides a comprehensive review of the SC and AC joints, including their ligaments and stabilizing structures. It explains the scapulothoracic articulation, emphasizing its role as a muscular joint rather than a synovial one. The video also covers the movements of the scapula, the muscles involved, and the function of bursa in reducing friction. Key anatomical landmarks and ligaments are highlighted to aid understanding of joint stabilization and movement.

Which ligament connects the clavicle to the first rib's costal cartilage?

• Posterior sternoclavicular ligament

• Anterior sternoclavicular ligament

• Costoclavicular ligament

• Interclavicular ligament

Which ligament is not involved in stabilizing the SC joint?

• Anterior sternoclavicular ligament

• Interclavicular ligament

• Costoclavicular ligament

• Coracoacromial ligament

What is the primary function of the coracoacromial ligament?

• Support the sternoclavicular joint

• Prevent upward translation of the humerus

• Connect the clavicle to the scapula

• Stabilize the AC joint

Where does the long head of the biceps brachii tendon run?

• Under the clavicle

• Along the scapular spine

• Over the acromion

• Through the intertubercular groove

What is the function of the transverse humeral ligament?

• Holds the biceps brachii tendon in place

• Connects the clavicle to the scapula

• Supports the sternoclavicular joint

• Stabilizes the AC joint

Which muscle originates from the coracoid process?

• Short head of biceps brachii

• Latissimus dorsi

• Subscapularis

• Pectoralis major

What type of joint is the scapulothoracic articulation?

• Cartilaginous joint

• Synovial joint

• Muscular joint

• Fibrous joint

Which muscle is primarily responsible for scapular protraction?

• Rhomboid major

• Levator scapulae

• Pectoralis major

• Serratus anterior

Which muscles are involved in the upward rotation of the scapula?

• Rhomboids, levator scapulae, pectoralis minor

• Upper trapezius, serratus anterior, lower trapezius

• Pectoralis major, latissimus dorsi, teres major

• Middle trapezius, rhomboid major, rhomboid minor

What is the role of the scapulothoracic bursa?

• Stabilize the scapula

• Reduce friction between the scapula and thoracic cage

• Connect the scapula to the clavicle

• Facilitate synovial fluid production