nerve roots

Question 1

L4 nerve root

Answer 1

L4 nerve root

a. disc level L3
b. mt:
foot dorsiflexion & inversion
- tibialis anterior
- deep peroneal n.
c. reflex: patellar tendon
d. medial aspect of leg
medial foot
medial aspect of big toe

Question 2

L5 nerve root

Answer 2

L5 nerve root

a. disc level L4
b. mt. (4):
1. foot dorsiflexion:
- extensor hallicus longus
- extensor digitorum longus
- deep peroneal n.

2. big toe dorsiflexion:
   - extensor hallicus longus
   - deep peroneal n.
3. toes 2,3,4 dorsiflexion:
   - extensor digitorum longus & brevis
   - deep peroneal n.

——ask pt. to turn over onto side

4. hip and pelvis abduction:
   - glueteus medius and miniums
   - superior gluteal n.

c. reflex: NONE
d. lateral leg, dorsum of foot, middle 3 toes

Question 3

nerve root S1

Answer 3

nerve root S1

a. disc level L5
b. mt (3) (seated)
1. foot plantarflexion:
- gastrocnemius and soleus
- tibial nerve

2. foot plantarflexion and eversion:
   - peroneus longus and brevis
   - superficial peroneal n.
3. hip extension: (prone)
   - gluteus maximus
   - inferior gluteal n.

c. reflex: achilles (prone)
d. posterior aspect of the leg,
lateral aspect of foot,
lateral aspect of little toe

Question 4

nerve root S2

Answer 4

nerve root S2

d. sensation:
posterior aspect of thigh over popliteal fossa onto posteromedial calf

Question 5

nerve root C5

Answer 5

nerve root C5

a. disc level C4
b. mt (2):
1. shoulder aBduction:
- deltoid m.
- axillary nerve

2. forearm flexion:
   - biceps m.
   - musculocutaneous nerve

c. reflex: biceps (thumb - pointy)
d. lateral arm

Question 6

nerve root C6

Answer 6

nerve root C6

a. disc level C5
b. mt (1)
1. wrist extension (cozen)
- extensor carpi radialis longus and brevis
- extensor carpi ulnaris
- radial nerve

c. reflex: brachioradialis (broad-on skin)

d. anterior lateral forearm
palm
thumb
2nd digit

Question 7

nerve root C7

Answer 7

nerve root C7

a. disc level C6
b. mt (3)
1. elbow extension:
- triceps m.
- radial nerve

2. wrist flexion:
   - flexor carpi radialis - median n.
   - flexor carpi ulnaris - ulnar n.
3. finger extension
   - extensor digitorum communis
   - extensor indicis profundus
   - extensor digiti minimi (radial n.)

c. reflex: triceps - broad
d. 3rd digit
middle of palm

Question 8

nerve root C8

Answer 8

nerve root C8

a. disc level C7
b. mt (1)
1. finger flexion
- flexor digitorum superficialis
- flexor digitorium profundus
- lumbricals
(median and ulnar nerves)

c. reflex: NONE
d. 4th and 5th digits
antero-medial hand and forearm

Question 9

T1 nerve root

Answer 9

T1 nerve root

a. disc level T1
b. mt (2)
1. finger aBduction
- dorsal interossei - ulnar n.

2. finger adDuction:
   - palmer interossei - ulnar n.

c. reflex: NONE
d. antero-medial arm (distal aspect of arm to proximal aspect of forearm