Muscles Of Upper Limb

Question 0

Pectoralis Major

Answer 0

Innervation: lateral and medial pectoral nerves
Actions: abduction, medial rotation, flexion and extension of humerus

Question 1

Pectoralis Minor

Answer 1

I: medial pectoral nerve
A: draws scapula anteriorly and inferiority (stabilises scapula)

Question 2

Subclavius

Answer 2

I: subclavian nerve C5, C6
A: anchors and depresses clavicle

Question 3

Serrated Anterior

Answer 3

I: long thoracic C5, C6, C7
A: protracts and rotates scapula, abducts arm >90’

Question 4

Trapezius: superior, middle, inferior

Answer 4

I: accessory nerve, C3 & C4 spinal nerves
A: superior elevates scapula, middle retracts scapula, inferior depresses scapula, superior and inferior rotate rotate glenoid cavity superiorly - elevating arm >90’

Question 5

Lattisimus Dorsi

Answer 5

I: thoracodorsal nerve C6,7,8
A: extension, abducts and medially rotates humerus “climbers muscle”

Question 6

Levator Scapulae

Answer 6

I: dorsal scapula C4,5 and cervical C3,4
A: elevates scapula, rotates scapula depressing the glenoid cavity

Question 7

Rhomboids (major and minor)

Answer 7

I: dorsal scapula nerve C4,5
A: retracts scapula, rotates scapula depressing the glenoid cavity

Question 8

Deltoid

Answer 8

I: axillary nerve C5,6
A: anterior part flexes arm, middle part abducts arm 15-90’, posterior part extends arm

Question 9

Teres Major

Answer 9

I: lower subscapular nerve C5,6
A: adducts and medially rotates arm

Question 10

Rotator cuff muscles

Answer 10

Supraspinatus: abducts arm , suprascapular nerve C5,6

Infraspinatus: lateral rotation of arm, suprascapular nerve

Teres Minor: lateral rotation of arm, weak adduction, axillary nerve C5,6

Subscapularis: medial rotation of arm, upper and lower subscapular nerves C5,6,7

Question 11

Which muscle depresses scapula?

Answer 11

Inferior trapezius

Question 12

Which muscles elevate scapula?

Answer 12

Superior trapezius, levator scapulae

Question 13

Which muscles retract scapula?

Answer 13

Middle trapezius, rhomboid

Question 14

Which muscle protracts scapula?

Answer 14

Serrated anterior

Question 15

Which muscle causes upward rotation of scapula?

Answer 15

Superior and inferior trapezius

Question 16

Which muscle causes downwards rotation of scapula?

Answer 16

Rhomboids

Question 17

Flexion of SJ

Answer 17

Pectoralis Major,
anterior deltoid,
coracobrachialis,
biceps brachii

Question 18

Extension of SJ

Answer 18

Posterior deltoid
Lattisimus Dorsi
Teres Major

Question 19

Abduction of SJ

Answer 19

0-15’ supraspinatus
15-90’ middle deltoid
> 90’ trapezius and serratus anterior

Question 20

Adduction of SJ

Answer 20

Pectoralis major
Lattisimus Dorsi
teres major

Question 21

Medial rotation of SJ

Answer 21

Subscapular is
Teres major
Pec major
Lattisimus Dorsi

Question 22

Lateral rotation of SJ

Answer 22

Infraspinatus

Teres minor

Question 23

Name the extrinsic superficial muscles of the back

Answer 23

Trapezius

Lattisimus Dorsi

Question 24

Name the deep muscles of the back

Answer 24

Levator scapulae | Rhomboids

Question 25

Name the scapulohumeral muscles of the back

Answer 25

Deltoid Teres Major Rotator cuff muscles - teres minor, supraspinatus, infraspinatus, subscapularis

Question 26

Biceps brachii

Answer 26

I: musculocutaneous nerve A: flexion of arm, supination of forearm

Question 27

Brachialis

Answer 27

I: musculocutaneous A: flexion of forearm

Question 28

Coracobrachialis

Answer 28

I: musculocutaneous A: abduction of arm, flexion of arm at SJ

Question 29

Triceps brachii

Answer 29

I: radial nerve A: extension of forearm

Question 30

Aconeus

Answer 30

I: radial nerve A: extension of forearm

Question 31

Name posterior muscles of arm

Answer 31

Triceps brachii | Aconeus

Question 32

Name anterior muscles of arm

Answer 32

Biceps brachii Brachialis Coracobrachialis

Question 33

Pronator Teres

Answer 33

I: median nerve A: pronates and flexes forearm

Question 34

Flexor carpi radialis

Answer 34

I: median nerve A: flexes and abducts hand

Question 35

Palmaris longis

Answer 35

I:median nerve A: flexes hand

Question 36

Flexor carpi ulnaris

Answer 36

I: ulna nerve A: flexes and adducts hand

Question 37

Flexor digits rum superficialis

Answer 37

I: median nerve A: flexes digits

Question 38

Flexor digitorum profundus

Answer 38

I: ulnar nerve A: flexes distal phalanges

Question 39

Flexor pollicis longis

Answer 39

I: median nerve A: flexes thumb

Question 40

Pronator quadratus

Answer 40

I: median nerve A: pronates forearm

Question 41

Brachioradialis

Answer 41

I: radial nerve A: flexion of forearm in mid-pronated position

Question 42

Extensor carpi radialis longus

Answer 42

I: radial nerve A: extend and abducts hand

Question 43

Extensor carpi radialis brevis

Answer 43

I: radial nerve (deep branch) A: extends and abducts hand

Question 44

Extensor digitorum

Answer 44

I: radial nerve (deep branch) A: extends medial 4 digits

Question 45

Extensor digiti minimi

Answer 45

I: radial nerve A: extends 5th digit

Question 46

Supinator

Answer 46

I: radial nerve (deep branch) A: supinates forearm

Question 47

Extensor carpi ulnaris

Answer 47

I: radial nerve (deep branch) A: extends and adducts hand

Question 48

Extensor indices

Answer 48

I: radial nerve (posterior interosseous nerve branch from deep radial nerve) A: extends 2nd digit

Question 49

Abductor pollicis longus

Answer 49

I: radial nerve (posterior interosseous branch) A:abducts and extends thumb

Question 50

Extensor pollicis longus

Answer 50

I: radial nerve (posterior interosseous branch) A: extends thumb

Question 51

Extensor pollicis brevis

Answer 51

I: radial nerve (posterior interosseous branch) A: extends thumb

Question 52

Name the superficial anterior muscles of forearm

Answer 52

Pronator Teres Flexor carpi radialis Palmaris longus Flexor carpi ulnaris

Question 53

Name the intermediate muscles of anterior forearm

Answer 53

Flexor digitorum superficialis

Question 54

Name the deep muscles of anterior forearm

Answer 54

Flexor digitorum profundus Flexor pollicis longus Pronator quadratus

Question 55

Name the superficial muscles of the posterior forearm

Answer 55

``` Brachioradialis Extensor carpi radialis longus Extensor carpi radialis brevis Extensor digitorum Extensor digiti minimi Extensor carpi ulnaris ```

Question 56

Name the deep muscles of the posterior forearm

Answer 56

``` Supinator Extensor indices Abductor pollicis longus Extensor pollicis brevis Extensor pollicis longus ```

Question 57

Which muscles of the forearm are innervated by the ulnar nerve

Answer 57

Flexor carpi ulnaris | Medial side of flexor digitorum profundus

Question 58

Which nerve innervates the majority of anterior forearm

Answer 58

Median nerve

Question 59

Which nerve innervates the posterior forearm

Answer 59

Radial nerve