Anatomy

Question 1

Extensor carpi ulnaris

Answer 1

Radial

Question 2

Extensor carpi radialis longus

Answer 2

Radial

Question 3

Extensor carpi radialis brevis

Answer 3

Radial

Question 4

Extensor digitorum

Answer 4

Radial

Question 5

Extensor indicis

Answer 5

Radial

Question 6

Extensor pollicis longus

Answer 6

Radial

Question 7

Extensor pollicis brevis

Answer 7

Radial

Question 8

Abductor pollicis longus

Answer 8

Radial

(the only non-extensor that is by the radial nerve, but if you think about it there are five possible movements of the thumb; extension, adduction, abduction, opposition, and flexion… and abduction is the one that is closest to extension, its basically extension in a different plane, so its obviously that one which is radial nerve)

Question 9

Flexor carpi ulnaris

Answer 9

Ulnar

Question 10

Flexor carpi radialis

Answer 10

Median

Question 11

Flexor digitorum profundus

Answer 11

Index and middle = median

Ring and pinky = ulnar

Question 12

Flexor digitorum superficialis

Answer 12

Median

Question 13

Flexor pollicis longus

Answer 13

Median

Question 14

What muscles make up the thenars and what are their innervations?

Answer 14

Flexor pollicis brevis - median
Adductor pollicis brevis - ulnar
Opponens policis - median
Abductor pollicis brevis - median

Question 15

Flexor pollicis brevis

Answer 15

Median

Question 16

Adductor pollicis brevis

Answer 16

Ulnar

(I struggle with this one but if you remember the LOAF mnemonic for median nerve which is lumbricals 1&2, opponens pollicis, abductor pollicis brevis (it must be abduction for median nerve as abduction is similar to flexion and opposition which are median), and flexor pollicis brevis; if you remember that mnemonic then you know that ALL of the muscles innervated by the median nerve are there, and the ulnar nerve must therefore innervate adductor pollicis brevis, as it isnt in the mnemonic)

Also for a quick way, we know one is median and one is ulnar… M comes before U (median, ulnar) and Ab comes before Ad (Abd, Add), so median = abd, ulnar = add

Question 17

Opponens pollicis

Answer 17

Median

Question 18

Abductor pollicis brevis

Answer 18

Median

Question 19

What muscles make up the hypothenars and what are their innervations?

Answer 19

Flexor digiti minimi
Opponens digiti minimi
Abductor digiti minimi

All ulnar

Question 20

Flexor digiti minimi

Answer 20

Ulnar

Question 21

Opponens digiti minimi

Answer 21

Ulnar

Question 22

Abductor digiti minimi

Answer 22

Ulnar

Question 23

Lumbricals

Answer 23

Index & middle = median

Ring & pinky = ulnar

Question 24

Dorsal interosseus muscles

Answer 24

Ulnar

Remember: DAB & PAD
dorsal abduct, palmar adduct

Question 25

Palmar interosseus muscles

Answer 25

Ulnar | Remember: DAB & PAD dorsal abduct, palmar adduct

Question 26

What mnemonic is useful for remembering the innervation of the intrinsic muscles of the hand?

Answer 26

LOAF - median nerve Lumbricals (index & middle) Opponens pollicis Abdutor pollicis brevis Flexor pollicis brevis Everything else is innervated by the ulnar nerve! (Hypothenars, lumbricals 3&4, interossei, & Add policis brevis which is a thenar muscle)

Question 27

Pronator quadratus

Answer 27

Median

Question 28

Pronator teres

Answer 28

Median

Question 29

What are the names of the pronator muscle(s) are what are their innervations?

Answer 29

Pronator teres & pronator quadratus - median nerve

Question 30

Which muscles are responsible for elbow flexion and what is their innervation?

Answer 30

Brachioradialis Biceps brachii Musculocutaneous nerve

Question 31

What muscles does the musculocutaneous nerve innervate and what do they do?

Answer 31

Biceps brachii & brachioradialis - Flexion of the arm at the elbow Coracobrachialis - Flexion of the shoulder

Question 32

Coracobrachialis nerve and function?

Answer 32

Musculocutaneous nerve Flexion of shoulder`

Question 33

Brachioradialis nerve and function?

Answer 33

Musculocutaneous nerve Flexion of arm at elbow

Question 34

Biceps brachii

Answer 34

Musculocutaneous nerve Flexion of arm at elbow

Question 35

Deltoid nerve and function?

Answer 35

Axillary Shoulder abduction

Question 36

Teres minor nerve and function?

Answer 36

Axillary External rotation

Question 37

Pectoralis major nerve and function?

Answer 37

Internal rotation of the shoulder (and adducts and flexes arm) Lateral pectoral and medial pectoral nerves

Question 38

Pectoralis minor nerve and function?

Answer 38

Elevates ribs, draws scapula down and inward. Medial pectoral nerve

Question 39

Serratus anterior nerve and function?

Answer 39

Boxers muscle Protracts scapula (also elevates ribs if scapula fixed) Long thoracic nerve

Question 40

Latissimus dorsi nerve and function?

Answer 40

Medial rotation, adduction of arm, extension of arm at shoulder Thoracodorsal nerve

Question 41

Trapezius nerve and function?

Answer 41

Stabilises shoulder, elevates neck, retracts, elevates and depresses scapula Cranial accessory nerve (XI)

Question 42

Rhomboids major nerve and function?

Answer 42

Retraction of scapula, steadies scapula Dorsal scapular nerve

Question 43

Rhomboids minor nerve and function?

Answer 43

Retraction of scapula, steadies scapula Dorsal scapular nerve

Question 44

Levator scapulae nerve and function?

Answer 44

Elevates scapula Dorsal scapula nerve

Question 45

Supraspinatus nerve and function?

Answer 45

Abduction of humerus (assists deltoid for initial bit) Suprascapular nerve

Question 46

Infraspinatus nerve and function?

Answer 46

Lateral (external) rotation of humerus Suprascapular nerve

Question 47

Teres minor nerve and function?

Answer 47

Lateral (external) rotation of humerus Axillary nerve

Question 48

Subscapularis nerve and function?

Answer 48

Internal (medial) rotation of humerus Subscapular nerve

Question 49

Teres major nerve and function?

Answer 49

Shoulder extension, adduction, medial rotation Subscapular nerve Note same actions as latissimus dorsi... remember that doing the butterfly in swimming requires you to lift arm backward and outward, which automatically pushes shoulder forward; so thats extension and adduction of the arm, and inward rotation of the shoulder... and the same for teres major.

Question 50

What are the rotator cuff muscles, their actions and their innervations?

Answer 50

Supraspinous - abduction of humerus - suprascapular nerve Infraspinous - external rotation of humerus - suprascapular nerve Teres minor - external rotation of humerus - axillary nerve Subscapularis - internal rotation of humerus - subscapular nerve