Shoulder Joint Ligaments and "rotator cuff" muscles Flashcards Preview

Anatomy Exam 3 > Shoulder Joint Ligaments and "rotator cuff" muscles > Flashcards

Flashcards in Shoulder Joint Ligaments and "rotator cuff" muscles Deck (16)
Loading flashcards...
1

Shoulder Joint

Somewhat unstable due to the large size of the humeral head in realted to the shallow glenoid cavity, and the flexible structure of the joint capsule.

2

Shoulder

Stability provided by the Tonus and tendons of the surrounding shoulder muscles as well as the supportive ligaments of the joint

3

Should joint

Represents the union of the clavicle with the acromion process and coracoid process of the scapula

4

Humerus

Articulates with the glenoid cavity of the scapula to form a synovial lined ball and socket joint

5

Coracoclavicular Ligament

A double ligament that unites the coracoid process of the scapula with the clavicle and is an extremely strong structure, providing tremendous stability to the joint

6

Acromioclavicular ligament

Location: passes fromt he acromion process to the clavicle
Function: helping to firmly unite the distal end of the clavicle to the scapula

7

Coracoacromial Ligament

Unites the coracoid process and the acromion process of the scapula serving to prevent the upward dislocation of the humeral head

8

Rotator Cuff

Surgical term, refers to the tends of four shoulder muscles that fuse with the lateral portion of the joint capsule
Muscles: supraspinatus, infraspinatus, subscapularis, teres minor

9

Supraspinatus

Location: found on the posterior surface of the scapula situated above the spine of the scapula

10

Infraspinatus Muscle

Location: originates below the spine, down to the inferior angle of the scapula

11

Subscapularis muscle

Location: located on the anterior surface of the scapula filling the subscapular fossa

12

Teres minor

Rounded muscle
Location: extends from the axillary border of the scapula

13

Inferior margin of the joint capsule

No tendons or ligaments found here

14

Rotator cuff muscle (function)

Protect the capsule and the sunovial membrane of the shoulder from trauma.

15

Long Head of the Biceps Brachii (Function)

Further support to the shoulder joint

16

Long Head of the Biceps Brachii (Location)

Muscle that passes through the anterior joint capsule, crossing over the head of the humerus before it leaves the joint capsule to join the short head of the biceps brachii