Peripheral Neuroanatomy

Question 1

What movement does the deltoid muscle do?

Answer 1

abducts shoulder

Question 2

what movement does the tricep muscle do?

Answer 2

extends arm

Question 3

what movement does the bicep muscle do?

Answer 3

flexes elbow

Question 4

which nerve supplies the deltoid muscle?

Answer 4

axillary

Question 5

which root innervates the deltoid myotome?

Answer 5

C5

Question 6

briefly overview the corticospinal pathway

Answer 6

motor pathway, primary motor neurons from motor cortex extends down to mostly decussate at the medulla (pyramids) and continues down brain stem and spinal cord to then synapse with nerve cell bodies in the anterior horn of spinal cord of secondary motor neurons

Question 7

which nerve innervates the bicep?

Answer 7

musculocutaneous

Question 8

which root innervates the bicep?

Answer 8

C6

Question 9

which nerve innervates the triceps, wrist extensor and finger extensor?

Answer 9

radial

Question 10

what movement does the wrist extensor allow?

Answer 10

wrist extension

Question 11

what movement does the finger extensor allow?

Answer 11

extends fingers

Question 12

which root innervates triceps, wrist extensor and finger extensor?

Answer 12

C7

Question 13

what does LOAF stand for?

Answer 13

Lateral lumbricals
Opponens Policis Brevis
Abductor Pollicis Brevis
Flexor Pollicis Brevis

Question 14

which nerve innervates the wrist flexor, finger flexor, pronator teres and LOAF muscles?

Answer 14

median nerve

Question 15

what movement does the flexor carpi ulnaris allow?

Answer 15

wrist flexion

Question 16

which nerve innervates the flexor carpi ulnaris, medial flexor digitorum, interossei, lumbrical and little finger flexor/abductor muscles?

Answer 16

Ulnar

Question 17

which roots innervate medial flexor digitorum, interossei, lumbrical and little finger flexor/abductor muscles

Answer 17

C8, T1

Question 18

what’s the C5 dermatome

Answer 18

lateral arm

Question 19

what’s C6 dermatome

Answer 19

thumb/ index finger

Question 20

what’s C7 dermatome

Answer 20

middle finger

Question 21

what’s C8 dermatome

Answer 21

little finger

Question 22

what’s T1 dermatome

Answer 22

axilla (armpit)

Question 23

what’s T4 dermatome

Answer 23

nipples

Question 24

what’s T10 dermatome

Answer 24

umbilicus (belly button)

Question 25

which parts of the hand does innervate ulnar nerve dermatome?

Answer 25

outer hand near little finger

Question 26

which parts of hand innervate median nerve dermatome?

Answer 26

most of palm, thumb and middle finger

Question 27

which parts of hand innervate radial nerve dermatome?

Answer 27

thumb back and area around thumb on back of hand

Question 28

Name 5 of the shoulder girdle muscles

Answer 28

5 from: Rhomboids, Trapezius, Serratus Anterior, teres major, teres minor, supraspinatus, scapula, deltoids

Question 29

which nerve innervates the rhomboids and scapula muscles?

Answer 29

dorsal scapula nerve

Question 30

what does the dorsal scapula nerve branch off?

Answer 30

C5 root

Question 31

which nerve innervates the trapezius muscle?

Answer 31

spinal accessory (CNXI)

Question 32

which nerve innervates the serratus anterior?

Answer 32

long thoracic nerve

Question 33

where does the long thoracic nerve branch off from?

Answer 33

C5,6 and 7

Question 34

which nerve innervates the deltoids and teres minor?

Answer 34

axillary

Question 35

which nerve innervates the teres major?

Answer 35

lower scapula

Question 36

what does the lower scapula nerve branch off?

Answer 36

posterior cord

Question 37

name 2 muscles which adduct the shoulder

Answer 37

pectoralis major teres major latissmus dorsi

Question 38

name 2 muscles which abduct the shoulder

Answer 38

supraspinatus deltoid trapezius serratus anterior

Question 39

name 2 muscles which flex the elbow

Answer 39

biceps brachiallis