3A - brachial plexus and compartments

Question 1

brachial plexus

Answer 1

network of interlacing nerves found in the upper arm area. clinically important for diagnosing upper limb injury and disease

Question 2

Roots

Answer 2

C5-T1

Question 3

Trunks

Answer 3

upper, middle, lower

Question 4

divisions

Answer 4

anterior, posterior

Question 5

cords

Answer 5

lateral, medial, posterior

Question 6

branches

Answer 6

axillary, radial, musculocutaneous, median, ulnar

Question 7

mnemonic for remembering the levels of the brachial plexus

Answer 7

Really
Thirsty
Drink
Cold
Beer

Question 8

anterior rami

Answer 8

separation of flexor and extensor nerves at the division level (extensors to the back, flexors to the front)

Question 9

extensor

Answer 9

muscle that straightens a joint

Question 10

flexor

Answer 10

the muscle that closes a joint

Question 11

long thoracic nerve

Answer 11

C5-C7

Question 12

suprascapular nerve

Answer 12

innervates supraspinatus and infraspinatus, C5-C6

Question 13

lateral pectoral nerve

Answer 13

innervates pectorals major, C5-C7

Question 14

medial pectoral nerve

Answer 14

innervates pectoralis minor, C8-T1

Question 15

medial cutaneous arm

Answer 15

innervates skin on medial side of arm

Question 16

medial cutaneous forearm

Answer 16

innervates skin of medial forearm

Question 17

upper subscapular nerve

Answer 17

innervates subscapularis

Question 18

Lower subscapular nerve

Answer 18

innervates teres major

Question 19

thoracodorsal nerve

Answer 19

innervation of latissimus dorsi

Question 20

axillary nerve

Answer 20

innervates deltoid and teres minor

Question 21

radial nerve

Answer 21

nerve that runs along the thumb side of the arm and the back of the hand. Innervates everything on the extensor side of upper limb

Question 22

extensor compartment nerves

Answer 22

axillary, radial nerves

Question 23

flexor compartment nerves

Answer 23

musculocutaneous, medial, ulnar nerves

Question 24

musculocutaneous nerve

Answer 24

only innervates muscles in the arm:
coracobrachialis, biceps brachii, brachialis

Question 25

medial nerve

Answer 25

innervates the anterior forearm (flexors and pronators of wrist, fingers, and thumb)

Question 26

ulnar nerve

Answer 26

sensory-motor nerve that affects the little finger side of the arm and palm of the hand

Question 27

Erb-Duchenne palsy

Answer 27

excess angle between neck and shoulder, stretching the top roots (C5/C6) and resulting in waiters tip
- IRREVERSIBLE
- baby pulled out by head, or fall on shoulder

Question 28

what muscles are paralyzed with erb-duchenne palsy

Answer 28

deltoid, biceps, and brachialis

Question 29

which nerves are impaired with erb-duchenne palsy

Answer 29

musculocutaneous and axillary

Question 30

Klumpke paralysis

Answer 30

excess angle between arm and body, usually overhead. Lower roots are stretched (C8/T1), resulting in poor ulnar nerve function, decreased arm and hand movement, loss of sensation to medial/distal hand
- REVERSIBLE