Joints - shoulder girdle

Question 1

what does the sternoclavicular joint possess?

Answer 1

it possesses an articular disk, which divides the space of the joint cavity into 2

Question 2

what is the head, and what’s the socket of this joint?

Answer 2

socket-shallow indentation in the sternum

head-sternal end of the clavicle

Question 3

describe the sternoclavicular capsule

Answer 3

slack, thick and strengthened by the anterior and posterior sternoclavicular ligaments.

Question 4

what type of a joint is the sternoclavicular joint?

Answer 4

ball and socket type, has 3 degrees of freedom.

Question 5

what’s the position of the costoclavicular ligament?

Answer 5

between the first rib and the clavicle.

Question 6

what type of a joint is the acromioclavicular joint?

Answer 6

it’s a stiff synovial joint

Question 7

what structure reinforces the acromioclavicular joint?

Answer 7

the coracoclavicular ligament

Question 8

what is the coracoclavicular ligament divided into

Answer 8

ANTEROLATERAL: trapezoid lig.(upper medial marg. of the coracoid process)——> trapezoid line (lateral clavicle)

ANTEROMEDIAL: conoid ligament (base of the coracoid process) ——> conoid tubercle

Question 9

what’s the maximum range of motion for the glenohumeral joint ON ITS OWN

Answer 9

60-90 degreed

Question 10

what type of a joint is the glenohumeral joint?

Answer 10

ball and socket type, multiaxial, 3 degrees of freedom

Question 11

what makes up the articular surfaces of the glenohumeral joint?

Answer 11

the glenoid cavity reinforced and widened by a fibrocartilage+tendon, and the head of the humerus covered w hyaline cartilage.

Question 12

which structures stabilize the gh joint?

Answer 12

cuff rotator muscles, long gead of the biceps brachii, the deltoid muscle, extracapsular ligaments and bony processes

Question 13

what are the possible movements of the GH joint?

Answer 13

flexion-extension
adduction-abduction
lateral rotation-medial rotation
circumduction