Applied peripheral neuropathy

Question 1

What are the dermatomes of the upper limb?

Answer 1

C5 - over deltoid
C6 - index finger
C7 - middle finger
C8 - little finger
T1 - inner arm
T2 - apex of axilla

Question 2

What are the dermatomes of the lower limb?

Answer 2

L2 - anterior medial thigh
L3 - over knee
L4 - medial aspect of tibia
L5 - dorsum of foot running to big toe
S1 - lateral heel
S2 - popliteal fossa

Question 3

What are the nerve innervations for movements of the upper limb?

Answer 3

C5 - shoulder abduction
C6 - elbow flexion
C7 - elbow extension
C8 - finger flexion
T1 - finger abduction

Question 4

What are the nerve innervations for movements of the lower limb?

Answer 4

L2 - hip flexion
L3 - knee extension
L4 - ankle dorsiflexion
L5 - extension of big toe
S1 - ankle plantar flexion
S2 - knee flexion

Question 5

What muscle does shoulder abduction?

Answer 5

Deltoid

Question 6

What nerve supplies the deltoid muscle and what cord and trunk of the brachial plexus does this arise from? What is the nerve root?

Answer 6

Axillary
Posterior
Upper
C5

Question 7

What muscle does elbow flexion?

Answer 7

Biceps brachii

Question 8

What nerve supplies the biceps brachii muscle and what cord and trunk of the brachial plexus does this arise from? What is the nerve root?

Answer 8

Musculocutaneous
Lateral
Upper
C6

Question 9

What muscle does shoulder adduction?

Answer 9

Pectoralis major

Latissimus dorsi

Question 10

What nerve supplies the pectoralis major muscle? What is the nerve root?

Answer 10

Pectoral nerves

C5-T1

Question 11

What nerve supplies the latissimus dorsi muscle? What is the nerve root?

Answer 11

Thoracodorsal

C6-8

Question 12

What muscle does elbow extension?

Answer 12

Triceps

Question 13

What nerve supplies the triceps muscle and what cord and trunk of the brachial plexus does this arise from? What is the nerve root?

Answer 13

Radial
Posterior
Upper and middle
C7

Question 14

What muscle does wrist extension?

Answer 14

Extensor carpi radialis

Question 15

What nerve supplies the extensor carpi radialis muscle and what cord and trunk of the brachial plexus does this arise from? What is the nerve root?

Answer 15

Radial
Posterior
Upper and middle
C7/8

Question 16

What muscle does wrist flexion?

Answer 16

Flexor carpi radialis

Question 17

What nerve supplies the flexor carpi radialis muscle and what cord and trunk of the brachial plexus does this arise from? What is the nerve root?

Answer 17

Ulnar
Medial
Lower
C7/8

Question 18

What muscle does finger flexion?

Answer 18

FDS/FDP

Question 19

What nerve supplies the FDS/FDP muscles and what cord and trunk of the brachial plexus does this arise from? What is the nerve root?

Answer 19

Median (+ulnar)
Medial
Lower
C8

Question 20

What muscle does finger extension?

Answer 20

Extensor digitorum

Question 21

What nerve supplies the extensor digitorum muscle and what cord and trunk of the brachial plexus does this arise from? What is the nerve root?

Answer 21

Radial
Posterior
Lower
C8

Question 22

What muscle does finger abduction?

Answer 22

Dorsal interossei

Question 23

What nerve supplies the dorsal interossei muscle and what cord and trunk of the brachial plexus does this arise from? What is the nerve root?

Answer 23

Ulnar
Medial
Lower
T1

Question 24

What can cause a winged scapula?

Answer 24

Nerve lesion

Myopathy

Question 25

What nerve lesions can cause winged scapula?

Answer 25

Long thoracic (most common) - serratus anterior Accessory (less common) - trapezius Dorsal scapular nerve (extremely rare) - rhomboids

Question 26

What muscle does hip flexion?

Answer 26

Iliopsoas

Question 27

What is the nerve supply of iliopsoas and what is the nerve root?

Answer 27

Branch of femoral | L2

Question 28

What muscle does hip extension?

Answer 28

Gluteus maximus

Question 29

What is the nerve supply of gluteus maximus and what is the nerve root?

Answer 29

Inferior gluteal | L5-S2

Question 30

What muscle does knee extension?

Answer 30

Quads

Question 31

What is the nerve supply of the quads and what is the nerve root?

Answer 31

Femoral | L3

Question 32

What muscle does knee flexion?

Answer 32

Hamstrings

Question 33

What is the nerve supply of hamstrings and what is the nerve root?

Answer 33

Sciatic L5 | Tibial (bit of peroneal) S1/2

Question 34

What muscle does ankle dorsiflexion?

Answer 34

Tibialis anterior

Question 35

What is the nerve supply of tibialis anterior and what is the nerve root?

Answer 35

Peroneal | L4

Question 36

What muscle does extension of the big toe?

Answer 36

Extensor hallucis longus

Question 37

What is the nerve supply of extensor hallucis longus and what is the nerve root?

Answer 37

Peroneal | L5

Question 38

What muscle does ankle plantar flexion?

Answer 38

Gastrocnemius

Question 39

What is the nerve supply of gastrocnemius and what is the nerve root?

Answer 39

Tibial | S1

Question 40

What are the differentials for foot drop?

Answer 40

``` Muscle - myopathy Nerve - peroneal nerve/sciatic nerve Root L4/5 Anterior horn MND Brain - parasaggital meningioma ```