Review of Brachial and Lumbosacral plexus

Question 1

Lateral and medial cord nerves will innervate?

Answer 1

anterior compartment

Question 2

Posterior cord nerves will innervate?

Answer 2

the posterior arm compartment

Question 3

Musculocutaneous n?

Answer 3

innervates all m in anterior compartment of the arm
coracobrachialis, biceps brachii, brachialis
supplies most flexors in arm
carries sensory information from the lateral forearm

Question 4

Anterior compartment of the forearm and hand?

Answer 4

anterior forearm is mainly median, does some in hand

hand is mostly ulnar and 1 and 1/2 m in forearm

Question 5

Median nerve?

Answer 5

innervate most of the anterior forearm
supplies most flexors in forearm

hand- 1st and 2nd lumbricals, abductor pollicis brevis, opponens pollicis, flexor pollicis brevis (recurrent branch of median nerve)

sensory info from the palmar aspect of digits 1-3 the lateral 1/2 of the 4th digit

Question 6

Ulnar nerve?

Answer 6

supplies most intrinsic hand muscles

forearm: flexor carpi ulnaris, 1/2 of flexor digitorim profundus

ulnar nerve carries sensory information from the palmar and dorsal aspects of the 5th digit and the ulnar 1/2 of the 4th digit

Question 7

Axillary nerve?

Answer 7

deltoid and teres minor

sensory info from lateral shouldar

Question 8

radial nerve?

Answer 8

all muscles of the posterior arm
triceps brachii, anconeus
supplies extensors in the arm
supplies all extensors in the forearm

sensory from posterior arm and posterior forearm

Question 9

Radial nerve injury?

Answer 9

wrist drop
damage in arm vs cubital fossa
damage to superficial branch vs deep branch

Question 10

ulnar nerve injury?

Answer 10

claw hand

damage in wrist vs forearm

Question 11

median nerve injury?

Answer 11

carpal tunnel syndrome

distribution of motor damage involving the intrinsic hand muscles

Question 12

axillary nerve injury?

Answer 12

prone to injury with damage to surgical neck of humerus

deltoid and teres minor knocked out, anesthesia on upper lateral arm

Question 13

clinical appearance of Erb-Duchenne palsy?

Answer 13

paralysis of muscles of the shoulder and arm supplied by C5-C6
upper limb adducted shoulder, medially rotated arm, and extended elbow
lateral aspect of upper arm also experiences loss of sensation

Question 14

Klumpke paralysis?

Answer 14

short muscles of the hand are affected and a claw hand forms

Question 15

what goes through the carpal tunnel?

Answer 15

median nerve
flexor digitiorum profundus
flexor digitorum superficialis
flexor pollicis longus

Question 16

Ulnar nerve injury?

Answer 16

most common place is posterior to the medial epicondyle of the humerus
wrist adduction is impaired
hard to make a fist (cannot flex 4th and 5th digits), claw hand

Question 17

if ulnar injury is in wrist what difference symptoms would you see?

Answer 17

would still be able to flex 4th and 5th digits but have sensory loss

Question 18

Ulnar vs Klumpke?

Answer 18

ulnar is last 2 fingers, klumpke is 2-5 fingers cant flex

Question 19

Winged scapula is damage to what nerve?

Answer 19

long thoracic nerve

Question 20

Crutch palsy?

Answer 20

compression in axillary region
can put pressure on posterior cord
(axillary and radial)

Question 21

Lumbosacral plexus anterior vs posterior?

Answer 21

L1-S4

anterior divisions go to flexors

posterior divisions go to extensors

Question 22

Femoral nerve?

Answer 22

posterior division L2-L4
motor innervation to anterior thigh muscles (extensors)
rectus femoris, vastus, iliopsoas, pectineus, sartorius

Question 23

Obturator nerve?

Answer 23

anterior division L2-L4
motor innervation to medial thigh (adducter muscles)
adductors, gracilis, obturator externus

Question 24

Superior and inferior gluteal nerves?

Answer 24

posterior division of L4-S1
motor innervation
superior- gluteus medius, minimus, tensor fasciae latae

inferior- gluteus max

Question 25

Sciatic nerve?

Answer 25

L4-S3
anterior (Tibial nerve)

Posterior (common fibular)

Question 26

Tibial nerve?

Answer 26

anterior division of sciatic nerve

motor innervation to posterior nerve (flexors)

Question 27

Common fibular nerve?

Answer 27

posterior division of sciatic nerve
motor innervation to anterior and lateral leg

anterior-deep fibular n, extensors

lateral leg- superficial tibial n

Question 28

Damage to tibial nerve?

Answer 28

loss of plantarflexion, toe flexion

Question 29

Damage to common fibular nerve?

Answer 29

foot drop

Question 30

injury to sciatic nerve?

Answer 30

loss of plantarflexion, toe flexion
foot drop
plus problems with thigh extension and leg flexion