Pec and Shoulder

Question 1

what type of joint is the sternoclavicular?

Answer 1

modified saddle type synovial

Question 2

associated structures with sternoclavicular joint

Answer 2

fibrocartilage disc

Question 3

joint type of acromioclavicular joint

Answer 3

plane type synovial joint

Question 4

associated structures with acromioclavicular joint

Answer 4

fibrocartilage disc

Question 5

joint type of glenohumeral joint

Answer 5

ball and socket type synovial joint

Question 6

list non contractile structures enhancing stability of GH joint (3)

Answer 6

1. coracoacromial ligament
2. glenohumeral ligaments
3. glenoid labrum

Question 7

what is the glenoid labrum

Answer 7

fibrocartilaginous ring that attaches to margin of glenoid fossa and deepens the glenoid cavity

Question 8

joint type of scapulothoracic joint

Answer 8

physiological (NOT anatomical) joint

Question 9

degree of flexion/extension?

Answer 9

flexion to 180

extension to 60

Question 10

degree of rotation

Answer 10

external to 60 degrees

internal to 80 degrees

Question 11

degree of ab/adduction

Answer 11

0-180 degrees

Question 12

degree of ab/adduction

Answer 12

ab: 0-90 degrees
ad: 0-45 degrees

Question 13

scapulohumeral rhythm

Answer 13

to get full range of motion of glenohumeral joint, scapulothoracic joint contributes by rotating to move glenoid fossa, allowing for full range of motion

0-30 degrees: rotation at glenohumeral joint only

30-180 degrees: GH/ST movement

Question 14

innervation of trapezius

Answer 14

CN XI, C3, C4

Question 15

attachments of latissimus dorsi muscle

Answer 15

• spinous process T7-T12, iliac crest, ribs 9-12
• intertubercular groove of humerus

Question 16

innervation of latissimus dorsi muscle

Answer 16

thoracodorsal nerve

Question 17

attachments of levator scapulae muscle

Answer 17

• transverse process of C1-C4
• superior medial border of scapula

Question 18

innervation of levator scapulae muscle

Answer 18

dorsal scapular nerve (C5)

Question 19

attachments of rhomboid minor

Answer 19

• spinous processes C7 and T1
• medial scapular border at the level of root of scapular spine

Question 20

attachments of rhomoid major

Answer 20

• spinous processes T2-T5
• medial scapular border from level of spine to inferior angle

Question 21

innervation of rhomboid minor and major

Answer 21

dorsal scapular nerve

Question 22

innervation of pectoralis major

Answer 22

lateral and medial pectoral nerves

Question 23

innervation of pectoralis minor

Answer 23

medial pectoral nerve

Question 24

innervation of serratus anterior

Answer 24

long thoracic nerve

Question 25

innervation of subclavius

Answer 25

nerve to subclavius

Question 26

coracobrachialis attachments

Answer 26

• tip of coracoid process
• medial, middle 1/3 of humerus

Question 27

action of coracobrachialis

Answer 27

flex and adduct shoulder

Question 28

innervation of coracobrachialis

Answer 28

musculocutaneous nerve

Question 29

attachemnts of deltoid

Answer 29

• scapula spine, acromion, lateral 1/3 of clavicle
• deltoid tuberosity of humerus

Question 30

innervation of deltoid muscle

Answer 30

axillary nerve

Question 31

teres major attachments

Answer 31

• inferior lateral aspect of posterior surface of scapula
• medial lip of intertubercular groove of humerus

Question 32

teres major innervation

Answer 32

lower subscapular nerve

Question 33

4 rotator cuff muscles

Answer 33

1. supraspinatus
2. infraspinatus
3. teres minor
4. subscapularis

Question 34

supraspinatus attachments

Answer 34

• supraspinous fossa
• greater tubercle

Question 35

infraspinatus attachments

Answer 35

• infraspinous fossa
• greater tubercle

Question 36

teres minor attachments

Answer 36

middle part of lateral border of scapula

greater tubercle

Question 37

subscapularis attachments

Answer 37

subscapular fossa

lesser tubercle

Question 38

innervation of supraspinatus

Answer 38

suprascapular nerve

Question 39

innervation infraspinatus

Answer 39

suprascapular nerve

Question 40

innervation teres minor

Answer 40

axillary nerve

Question 41

innervation subscapularis

Answer 41

upper subscapular nerve and lower subscapular nerve

Question 42

what passes through quadrangular space?

Answer 42

axillary nerve and posterior humeral circumflex artery