Shoulder Muscles

Question 1

Degrees of movement available at the shoulder join

Answer 1

Flexion/Extension
Abduction/Adduction
Medial/Lateral rotation
Circumduction

Question 2

Flexion ROM at shoulder

Answer 2

150-180

Question 3

Extension ROM at shoulder

Answer 3

50-70

Question 4

Abduction ROM

Answer 4

150-170

Question 5

Adduction ROM at shoulder

Answer 5

30-40

Question 6

Lateral rotation ROM at shoulder

Answer 6

70-90

Question 7

Medial rotation ROM at shoulder

Answer 7

70-90

Question 8

Muscles of shoulder flexion

Answer 8

Deltoid (anterior fibres)
Pec major Sternocostal head
Long head of biceps

Question 9

Muscles of shoulder extension

Answer 9

Deltoid (posterior fibres)
Latissimus Dorsi
Pec major
Teres major
Long head of triceps

Question 10

Muscles of shoulder abduction

Answer 10

Deltoid (middle fibres)
Supraspinatus

Question 11

Shoulder Adduction

Answer 11

Pec major
Latissimus dorsi
Teres major
Coracobrachialis

Question 12

Shoulder medial rotation

Answer 12

Deltoid (anterior fibres)
Subscapularis
Pec major
Latissimus dorsi

Question 13

Lateral rotation

Answer 13

Infraspinatus
Teres minor
Deltoid (posterior fibres)

Question 14

Latissimus dorsi attachments

Answer 14

From:
T7-12
All lumbar and sacral spinous processes
Part of iliac crest

To:
Intertubercular groove of prox humerus

Question 15

Muscles of rotator cuff?

Answer 15

Infrapinatus
Supraspinatus
Subscapularis
Teres minor

Question 16

Biceps brachi attachments

Answer 16

From: LH- supraglenoid tubercle
SH- Coracoid process of scapula

To: Tuberosity of distal radius
& Bicipital aponeurosis

Question 17

Triceps brachii attachments

Answer 17

From: LH- infraglenioid tubercle of scapula
LAH upper, posterior surface of humerus
MH- lower, posterior surface of humerus

To: Olecranon of prof and posterior ulna

Question 18

Pec major attachments

Answer 18

Two heads
Sternocostal head: manubrium of sternum 1-7 costal cartilages and aponeurosis of external oblique

Clavicular head: medial half of anterior surface of clavicle

To: crest of greater tubercle

Question 19

Actions of pec major muscle?

Answer 19

Clavicular head: Flexion of shoulder joint

Sternocostal head: extension (back to neutral)

Both heads: Adduction and medial rotation

Question 20

Latissimus dorsi attachments

Answer 20

From: spinous process T7-12 and all Lumbar and Sacral vertebrae and iliac crest

To: (floor of) inertubercular groove of humerus

Question 21

Rotator cuff muscles common insertion

Answer 21

Greater tubercle of humerus

Question 22

Rotator cuff origins

Answer 22

Supraspinatus- supraspinous fossa
Infrapinatus- infraspinous fossa
Subscapularis- subscapular fossa
Teres minor- superior half of posterior aspect of lateral border of scapula

Question 23

Coracobrachialis attachments

Answer 23

From: coracoid process of scapula

To: medial aspect of mid-shaft of humerus

Question 24

Axilla borders

Answer 24

Remember PSS like piss cause some people armpits smell of piss probs idk

P- pec major
S- serratus anterior
S- subscapularis

Question 25

Axilla contents

Answer 25

Brachial plexus
Axillary artery and vein
Pec minor