Joints of Shoulder Girlde + Glenohumeral

Question 1

What type of joint are the sternoclavicular joints?

Answer 1

Saddle type joints that functions like a ball & socket

Question 2

What ligaments hold the sternoclavicular joints?

Answer 2

Anterior & posterior sternoclavicular ligaments - reinforce anteriorly and posteriorly
Interclavicular ligament - reinforce superiorly
Costoclavicular ligament - limits elevation of clavicle

Question 3

What type of joints are the acromioclavicular joints?

Answer 3

Plane/Gliding (Synovial)

Question 4

What ligaments hold the acromioclavicular joints?

Answer 4

Acromioclavicular ligaments - reinforces joint superiorly (limiting the occurence of the “step deformity”)
Coracoclavicular ligaments - extrinsic ligaments, and divided:
a) Conoid ligament - prevents excess superior movement
b) Trapezoid ligament - prevent excess lateral movement + stability of acromioclavicular joint

Question 5

What consists of the “scapulothoracic joint”? More specifically, the bony- and myostructures.

Answer 5

Bony-structures - scapula (subscapular fossa) + thorax

Myostructures - subscapularis + serratus anterior