Shoulder joint Flashcards Preview

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Flashcards in Shoulder joint Deck (16):
1

What articulates in the shoulder joint?

The head of the humerus and the Glenoid fossa of the scapula.

2

What is the nerve supply to the Glenohumeral joint?

The axillary nerve passes through it and subscapular and suprascapular nerves. (C5&C6)

3

What is the joint capsule made of?

A fibrous sheath

4

What type of joint is the glenohumeral joint?

A synovial joint

5

What is the role of bursae?

To reduce friction

6

What is the most clinically important bursae in the glenohumeral joint?

Subacromial.

7

What ligaments are in the glenohumeral joint?

Superior, middle and inferior glenohumeral ligaments.
coroacohumeral ligament
Transverse humeral ligament
Coracoacromial ligament

8

Why is the coracoacromial ligament important?

It joins the acromion to the coracoid process of the scapula. This means that superior displacement of the humeral head is avoided due to the ligaments protective arch.

9

What are the movements of the shoulder joint?

Extension
Flexion
Adduction
Abduction
Medial rotation
Lateral rotation

10

What contributes to mobility of the shoulder joint?

It is a ball and socket joint
It is a relative unstable joint

11

What contributes to stability of the shoulder joint?

The ligaments
The rotator cuff muscles
The glenoid labrum

12

What are the common injuries of the shoulder joint?

Anterior dislocation
Posterior dislocation
Rotator cuff tendonitis

13

How can an anterior discolation of the shoulder joint occur?

Trauma to an abducted arm (usually posterior direction)

14

What can be damaged in anterior dislocation of the shoulder joint?

Axillary nerve injury, leading to paralysis of the deltoid muscle and loss of feeling over the regimental badge area.
Can also have damage to the radial nerve as it is in the radial groove

15

What is rotator cuff tendonitis?

When there is repetitive use of the muscles there are degenerative changes in the subacromial bursae and supraspinatus tendon.

16

What is the main sign of rotator cuff tendonitis?

Painful arc syndrome. (Pain the in the middle of abduction where the affected area comes into contact with the acromion.