The Acromioclavicular (AC) Joint | Anatomy and Function

The video tutorial provides an in-depth exploration of the acromioclavicular (AC) joint, comparing it to the sternoclavicular joint. It covers the anatomy of the scapula, including the subscapular fossa and coracoid process, and details the ligaments and tendons around the shoulder, such as the transverse humeral ligament and biceps tendon. The tutorial explains the ligaments stabilizing the AC joint, including the acromioclavicular and coracoclavicular ligaments, and discusses the blood and nerve supply to the AC joint. It concludes with a detailed look at the anatomy and function of the shoulder region, highlighting the glenoid cavity, subacromial space, and axillary pouch.

What type of joint is the Acromioclavicular (AC) joint?

• Plane synovial joint

• Hinge joint

• Pivot joint

• Ball and socket joint

Which structure is more anterior on the scapula?

• Glenoid cavity

• Coracoid process

• Acromion

• Spine of the scapula

What is the function of the acromioclavicular ligament?

• Supplies blood to the AC joint

• Forms the subacromial arch

• Connects the humerus to the scapula

• Stabilizes the joint superiorly

Which two ligaments form the coracoclavicular ligament?

• Glenohumeral and transverse humeral ligaments

• Suprascapular and thoracoacromial ligaments

• Conoid and trapezoid ligaments

• Acromioclavicular and coracoacromial ligaments

Which artery supplies blood to the AC joint?

• Suprascapular artery

• Axillary artery

• Brachial artery

• Radial artery

Which nerve is responsible for innervating the AC joint?

• Median nerve

• Ulnar nerve

• Lateral pectoral nerve

• Radial nerve

What is the role of the transverse humeral ligament?

• Connects the clavicle to the scapula

• Forms the subacromial space

• Stabilizes the AC joint

• Provides a sheath for the biceps tendon

What is the purpose of the subacromial arch?

• Prevents upward translation of the humerus

• Supplies blood to the shoulder joint

• Connects the clavicle to the scapula

• Allows for greater range of motion

Which ligament completes the subacromial arch?

• Acromioclavicular ligament

• Coracoacromial ligament

• Conoid ligament

• Trapezoid ligament

What is the function of the axillary pouch in the shoulder joint?

• Supplies blood to the shoulder joint

• Increases stability of the shoulder

• Connects the humerus to the scapula

• Allows for slack during shoulder movement