Peripheral Nerves

Question 1

Musculocutaneous n. spinal levels

Answer 1

C5-6

Question 2

Axillary n. spinal levels

Answer 2

C5-6

Question 3

Radial n. spinal levels

Answer 3

C5-T1

Question 4

Median n. spinal levels

Answer 4

C6-T1

Question 5

Ulnar n. spinal levels

Answer 5

C7-T1

Question 6

Musculocutaneous n. innervation

Answer 6

Coracobrachialis, biceps, brachiais

Question 7

Musculocutaneous n. sensory distribution

Answer 7

Anterolateral surface of forearm

Question 8

Musculocutaneous n paralysis

Answer 8

Loss of elbow flexion when supinated, weak supination

Question 9

Axillary n. innervation

Answer 9

Deltoid, teres minor

Question 10

Axillary n. sensory distribution

Answer 10

Lateral arm over lower portion of deltoid

Question 11

Axillary n. paralysis

Answer 11

Loss of shoulder ABD, weakened ER

Question 12

Radial n. innervation

Answer 12

Triceps, anconeus, brachioradialis, supinator, wrist, finger, and thumb extensors

Question 13

Radial n. sensory distribution

Answer 13

Posterior arm, posterior forearm, posterior radial side of hand

Question 14

Radial n. paralysis

Answer 14

Loss of elbow, wrist, finger, and thumb extension

Question 15

Median n. innervation

Answer 15

Pronators, wrist and finger flexors on the radial side, most thumb muscles.

Question 16

Median n. sensory distribution

Answer 16

Palmar aspect of thumb, second, third, and fourth (radial half) fingers

Question 17

Median n. paralysis

Answer 17

Loss of pronation, thumb opposition, flexion, and adduction

Question 18

Ulnar n. innervation

Answer 18

Flexor carpi unlaris, flexor digitorum profundus (medial half), fourth and fifth lumbricals

Question 19

Ulnar n. sensory distribution

Answer 19

Fourth finger (medial portion), fifth finger

Question 20

Sciatic n. spinal levels

Answer 20

L4-S3

Question 21

Sciatic n. innervation

Answer 21

Hamstrings and adductor magus

Question 22

Sciatic n. sensory distribution

Answer 22

Sciatic nerve branches into tibial, superficial fibular, and deep fibular. It’s sensory distribution is though those nerves.

Question 23

Sciatic n. paralysis

Answer 23

Loss of knee flexion, weak hip abduction, loss of all muscle function below the knee

Question 24

Femoral n. spinal levels

Answer 24

L2-4

Question 25

Femoral n. innervation

Answer 25

Sartorius, quads, iliacus, pectineus

Question 26

Femoral n. sensory distribution

Answer 26

Middle anterior thigh and medial thigh proximal to the knee

Question 27

Femoral n. paralysis

Answer 27

Loss of hip flexion and knee extension

Question 28

Tibial n. spinal levels

Answer 28

L4-S3

Question 29

Tibial n. innervation

Answer 29

Gastroc, soleus, plantaris, popliteus, tibialis posterior

Question 30

Tibial n. sensory distribution

Answer 30

Posterior/lateral calf, ankle, and heel

Question 31

Tibial n. paralysis

Answer 31

Loss of plantar flexion and supination

Question 32

Superficial fibular n spinal levels

Answer 32

L4-S3

Question 33

Superficial fibular n. innervation

Answer 33

Fibularis longus and brevis

Question 34

Superficial fibular n. sensory distribution

Answer 34

Anterior/lateral distal lower leg and ankle and most of the dorsum of the foot

Question 35

Superficial fibular n. paralysis

Answer 35

Loss of eversion

Question 36

Deep fibular n. spinal levels

Answer 36

L4-S2

Question 37

Deep fibular n. innervation

Answer 37

Tibialis anterior, extensor hallicus longus, extensor digitorum longus, fibularis tertius, first and second dorsal interossei, extensor digitorum brevis, extensor hallicus brevis

Question 38

Deep fibular n. sensory distribution

Answer 38

Web space between first and second toes on the dorsum of the foot.

Question 39

Deep fibular n. paralysis

Answer 39

Loss of dorsiflexion and weak foot intrinsics