Joints and ligaments of upper limb

Question 1

Acromioclavicular joint ligaments

Answer 1

Synovial joint-plane

Acromioclavicular ligament: superiorly btwn acromion/end of clavicle
Coracoclavicular ligament: extrinsic ligament, anchors clavicle to coracoid process. Trapezoid and Conoid ligaments make it up.

Between the acromion of scapula and lateral clavicle.

Question 2

Scapulathoracic joint

Answer 2

The scapula glides and pivots over connective tissue between the subscapularis muscle and serratus anterior.

Question 3

Sternoclavicular joint

Answer 3

Synovial joint saddle
Between sterna, end of clavicle and manubrium.

Movement: allows clavicle to elevate and rotate in conjunction with the limb.

Question 4

What are the joints of the shoulder girdle?

Answer 4

Acromioclavicular (acromion and lateral clavicle)
Glenohumeral (glenioid cavity and humerus)
Sternoclavicular
& scapulathoracic “joint”(scapula glides on connective tissue btwn serratus ant. And the subscapularis)