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NLM1 Anatomy > Shoulder > Flashcards

Flashcards in Shoulder Deck (47)
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1

What is the sternoclavicular joint?

Plane synovial joint formed by medial end of clavicle and manubrium of sternum and 1st costal cartilage. Contains articular disc.

2

What stabilises the sternoclavicular joint?

Costoclavicular ligaments that attach to clavicle and 1st rib

3

What is the acromioclavicular joint?

Plane synovial joint located between lateral end of clavicle and the acromion of scapula.

4

What is the acromioclavicular joint stabilised by?

Weak fibrous capsule is strengthened superiorly by acromioclavicular ligaments and trapezius and deltoid fibres. Mainly by coraco-clavicular joint (suspends weight of upper limb from the clavicle)

5

What is the scapulothoracic joint?

Bone-muscle-bone between costal surface of scapula, subscapularis ,uscle, serratus anterior and thoracic wall.

6

What movements are possible at the scapulothoracic joint?

protraction, retraction, elevation, depression and rotation

7

What produces protraction and lateral rotation of the scapula?

Serratus anterior

8

What rotates inferiorly, retracts, elevates and depresses scapula?

Trapezius

9

What retracts and inferiorly rotates scapula?

Rhomboid major and minor

10

How is the glenohumeral joint commonly dislocated? Why?

Anteriorly. The coracoacromial ligament stabilises the joint superiorly

11

What does the fibrocartilagenous glenoid labrum do?

Deepens the glenoid fossa

12

What stabilises the glenohumeral joint?

Capsule and glenohumerla, coracohumeral and coracoacromial ligaments. Also rotator cuff muscles.

13

Name the rotator cuff muscles

Teres minor, infraspinatus, supraspinatus, subscaularis

14

Where are the glenohumeral ligaments?

On the internal surface of the fibrous capsule

15

Where does the coracohumeral ligament attach?

Coracoid process, anatomical neck of humerus and transverse humeral ligament

16

Where are the most important cushions in the shoulder?

The subacromial/subdeltoid bursa separate coracoacromial arch and deltoid from supraspinatus tendon and glenohumeral joint

17

What may pain in the shoulder region be caused by?

Inflammation or tendons or bursa, muscle injury, osteophytes or microtrauma. Could be referred pain from diaphragm or peritoneum (phrenic innervation also C3-5)

18

Where does the serratus anterior attach?

1-8 ribs to anterior surface of scapula

19

Where does the pectoralis major attach?

Medial clavicle, maubrium and body of sternum and 1-6 costal cartilages to bicipital groove.

20

Where does the latisimus dorsi attach?

Spinous processes of lower T, L and S vertebrae to iliac crest. Tendon attaches to bicipital groove.

21

What innervates the lat dorsi?

Thoracodorsal nerve (C6, 7 &8)

22

Where does the deltoid attach?

Clavicle, scapula and deltoid tuberosity.

23

Where does the trapezius attach?

Occipital bone and C7-T12 to the scapula spine and clavicle.

24

Where does the pectoralis minor attach?

Deep to the pectoralis major, 3-5 ribs and coracoid process.

25

Where does the teres major attach?

Between lateral border of scapula and bicipital groove (next to pec maj and lar dorsi)

26

Where does the subscapularis attach and what does it do?

Costal scapula-> lesser tuberosity
Medial rotation

27

Describe the supra and infra spinatus

Dorsal surface of scapula, superior/inferior to spine of scapula, attach to greater tuberosity
Abduction and lateral rotation

28

Describe teres minor

Dorsal surface of scapulas on lateral border to greater tuberosity
Lateral rotation

29

What muscles are involved in abduction of the arm?

Suprspinatus, deltoid at shoulder joint. Trapezius and serratus anterior to get scapula to rotate to bring arm up further

30

What muscles laterally rotates the humerus?

Supra and infra spinatus and teres minor