Spinal Nerves Innervating Dermatomes and Myotomes

Question 1

What is the spinal nerve responsible for sensory of the shoulder?

Answer 1

C-5

Question 2

What is the spinal nerve responsible for sensory of the thumb?

Answer 2

C-6

Question 3

What is the spinal nerve responsible for sensory of the middle finger?

Answer 3

C-7

Question 4

What is the spinal nerve responsible for sensory of the little finger?

Answer 4

C-8

Question 5

What is the spinal nerve responsible for sensory of the nipple?

Answer 5

T-4

Question 6

What is the spinal nerve responsible for sensory of the umbilicus?

Answer 6

T-10

Question 7

What is the spinal nerve responsible for sensory of the groin?

Answer 7

L-1

Question 8

What is the spinal nerve responsible for sensory of the medial foot?

Answer 8

L-5

Question 9

What is the spinal nerve responsible for sensory of the lateral leg/foot?

Answer 9

S-1

Question 10

What is the spinal nerve responsible for sensory of the anal area?

Answer 10

S-2,3,4

Question 11

What is the spinal nerve responsible for innervating the muscle group upper extremity abductors (deltoid, biceps, brachii)?

Answer 11

C-5

Question 12

What is the spinal nerve responsible for innervating the muscle group forearm flexors and pronators (biceps bracii, brachioradialis)?

Answer 12

C-5/6

Question 13

What is the spinal nerve responsible for innervating the muscle group forearm extensor (triceps brachii), wrist extensors, and finger extensors?

Answer 13

C-7

Question 14

What is the spinal nerve responsible for innervating the muscle group intrinsic hand muscles?

Answer 14

C-8/T-1

Question 15

What is the spinal nerve responsible for innervating the muscle group thigh flexion (iliopsoas)?

Answer 15

L-2

Question 16

What is the spinal nerve responsible for innervating the muscle group leg extension (quadriceps)(knee jerk reflex)?

Answer 16

L-3/4

Question 17

What is the spinal nerve responsible for innervating the muscle group foot dorsiflexors and toe extensors (anterior tibial muscles)?

Answer 17

L-4/5

Question 18

What is the spinal nerve responsible for innervating the muscle group foot plantar flexors (posterior tibial muscles) and toe flexors (achilles tendon reflex)?

Answer 18

S-1/2

Question 19

What is the spinal nerve responsible for innervating the muscle group that is involved with anal contracting?

Answer 19

S-2,3,4