Dermatomes/Myotomes

Question 1

What is a dermatome?

Answer 1

SENSORY.
A unilateral area of skin innervated by the nerve fibers of single spinal nerve that originated from a single spinal cord segment.

Question 2

How many spinal nerves are there? Total and each side.

Answer 2

62 total, 31 on each side

Question 3

Dermatome of C5?

Answer 3

Shoulder

Question 4

Dermatome of C6?

Answer 4

Thumb, lateral forearm

Question 5

Dermatome of C7?

Answer 5

Middle finger

Question 6

Dermatome of C8?

Answer 6

Little finger

Question 7

Dermatome of L5?

Answer 7

Medial Foot

Question 8

Dermatome of S1?

Answer 8

Lateral foot

Question 9

What is a myotome?

Answer 9

MOTOR.

A muscle innervated by the nerve fibers of a single spinal nerve that originated from a single spinal cord segment.

Question 10

Myotome of C5?

Answer 10

Upper extremity abductors (deltoid, biceps brachii)

Raise arms out laterally

Question 11

Myotome of C6?

Answer 11

Forearm flexors (biceps brachii. brachioradialis)
Doing a curl with weights

Question 12

Myotome of C7?

Answer 12

Forearm extensor, wrist extensors, finger extensors

Tricep press

Question 13

Myotome of C8?

Answer 13

Intrinsic hand muscles

Question 14

Dermatome of T4?

Answer 14

Nipple

Question 15

Dermatome of T10?

Answer 15

Umbilicus

Question 16

Dermatome of L1?

Answer 16

Groin

Question 17

Myotome of L2?

Answer 17

Thigh flexion

Question 18

Myotome of L3/4?

Answer 18

Leg extension

Question 19

Myotome of L4/5?

Answer 19

Foot dorsiflexors and toe extensors

Question 20

Myotome of S1/2?

Answer 20

Foot plantar flexors and toe flexors