Upper limb dermatomes and myotomes

Question 1

Skin innervated by axillary nerve

Answer 1

MIlitary patch area

Question 2

Nerve innervating military patch area

Answer 2

Axillary nerve

Question 3

Skin innervated by radial nerve

Answer 3

Lateral aspect of arm
Posterior aspect of arm
Middle line of anterior forearm
Lateral 2 and a half fingers of posterior hand

Question 4

Nerve innervating skin of lateral and posterior arm

Answer 4

Radial nerve

Question 5

Nerve innervating the lateral 2 and half fingers of the posterior hand

Answer 5

Radial nerve

Question 6

Nerve innervating forearm except middle posterior strip

Answer 6

Musculocutanous nerve

Question 7

Skin innervated by the musculocutaneous nerve

Answer 7

Forearm, except mid strip on the posterior aspect

Question 8

Skin innervated by the median nerve

Answer 8

Palmar lateral three and a half fingers, and associated nail beds

Question 9

Nerve innervating the lateral three and a half palmar fingers

Answer 9

Median nerve

Question 10

Skin innervated by the ulnar nerve

Answer 10

Medial one and a half fingers, both palmar and dorsal sides of hand, and nail beds

Question 11

Nerve innervating medial one and a half fingers, both anterior and posterior

Answer 11

Ulnar nerve

Question 12

C5, C6 myotome

Answer 12

Elbow flexors

Question 13

Spinal segment controlling elbow flexion

Answer 13

C5, C6

Question 14

Spinal segment controlling elbow extension

Answer 14

C7

Question 15

C7 myotome

Answer 15

Elbow extension
Wrist extension
FInger extension

Question 16

Spinal segment controlling wrist extension

Answer 16

C7

Question 17

Spinal segment controlling wrist flexion

Answer 17

C6

Question 18

Spinal segment controlling shoulder abduction

Answer 18

C5

Question 19

C5 myotome

Answer 19

Shoulder abduction

With C6, elbow flexion

Question 20

C8 myotome

Answer 20

Finger flexion

With C7, elbow extension

Question 21

Spinal segment controlling finger extension

Answer 21

C7

Question 22

Spinal segment responsible for finger abduction

Answer 22

T1

Question 23

Spinal segments responsible for knee flexion

Answer 23

L5, S1

Question 24

Spinal segments responsible for knee extension

Answer 24

L3, L4

Question 25

L3, L4 myotome

Answer 25

Knee extension

Question 26

L5, S1 myotome

Answer 26

Knee flexion

Question 27

L4, L5 myotome

Answer 27

Hip extension | Ankle dorsiflexion

Question 28

S1, S2 myotome

Answer 28

Ankle plantarflexion

Question 29

Spinal segments responsible for ankle dorsiflexion

Answer 29

L4, L5

Question 30

Spinal segments responsible for ankle plantarflexion

Answer 30

S1, S2

Question 31

L4, L5 myotome

Answer 31

Hip extension | Ankle dorsiflexion

Question 32

L2, L3 myotome

Answer 32

Hip flexion

Question 33

Spinal segments responsible for hip extension

Answer 33

L4, L5

Question 34

Spinal segments responsible for hip flexion

Answer 34

L2, L3

Question 35

Spinal segments responsible for ankle inversion

Answer 35

L4

Question 36

Spinal segments responsible for ankle everison

Answer 36

L5, S1

Question 37

L5, S1 myotome

Answer 37

Knee flexion Ankle eversion Big toe extension

Question 38

L4 myotome

Answer 38

Ankle inversion

Question 39

Spinal segments responsible for big toe extension

Answer 39

L5, S1

Question 40

Spinal segments responsible for big toe flexion

Answer 40

S1, S2

Question 41

L5, S1 myotome

Answer 41

Knee flexion Ankle eversion Big toe extension

Question 42

S1, S2 myotome

Answer 42

Big toe flexion

Question 43

Spinal segments responsible for hip extension and ankle dorsiflexion

Answer 43

L4, L5