unit 5: brachial plexus, posterior cord

Question 1

nerve branch that contains fibers from C5 & C6, supplies subscapularis

Answer 1

superior subscapular

Question 2

nerve branch that contains fibers from C6-C8 that travels along post axillary wall to supply the latissimus dorsi

Answer 2

thoracodorsal

Question 3

nerve branch that contains fibers from C5 & C6 and suppplies subscapularis and teres major

Answer 3

inferior subscapular

Question 4

nerve branch that contains fibers from C5 & C6 , travels post around the surgical neck of the humerus and supplies the deltoid and teres minor

Answer 4

axillary

Question 5

branch off of the axillary nerve that supplies the skin over the lateral shoulder and upper arm (sensory only)

Answer 5

superior lateral cutaneous nerve of the arm

Question 6

nerve branch containing fibers from C5-C8 sometimes t1 that supplies all muscles in the posterior compartment of the arm and forearm

Answer 6

radial nerve

Question 7

the RADIAL nerve spirals around posterior to ___ from the medial bicipital sulcus then passes into forearm on the ___ side of the elbow after traveling bt brachialis and brachioradialis

Answer 7

humerus

anterior

Question 8

at both the level of the radial head & once in the forearm, the radial nerve splits into a ___ & __ branch

Answer 8

deep

superficial

Question 9

the SUPERFICIAL radial branch follows the ___ to the distal third of the forearm, then travels bt the brachioradialis & ____ to the posterior surface of hand

Answer 9

brachioradialis

radius

Question 10

DEEP radial branch penetrates the ___ muscle, gives off a series of branches to supply posterior forearm muscles then terminates as the __ ___ nerve

Answer 10

supinator

posterior interosseous

Question 11

nerve that branches off the radial nerve in the upper arm that supplies the skin on the posterior side of the upper arm

Answer 11

posterior cutaneous nerve of the arm

Question 12

nerve that branches off the radial nerve in the middle arm

Answer 12

inferior lateral cutaneous nerve of the arm

Question 13

the radial nerve has muscular branches given off in arm that supply the 3 heads of ___ ___ and ____ (via a branch to the med head of triceps)

Answer 13

triceps brachii

anconeus

Question 14

branch given off the radial nerve in the upper arm that supplies a narrow area of skin on the lateral posterior FOREarm

Answer 14

posterior cutaneous nerve of the forearm

Question 15

two muscles supplied by radial branches given off at the level of the lateral epicondyle

Answer 15

brachioradialis

extensor carpi radialis longus

Question 16

the superficial radial nerve in the forearm travels to the hand and gives of __ __ nerves as well as the :

Answer 16

dorsal digital

communicating branch w/ the ulnar n

Question 17

the superficial radial nerve in the forearm supplies the:

• radial side of the ___ hand
• __ side of thumb
• ___ side of proximal phalanges _ & _
• ___ half of extensor side of ring finger

Answer 17

posterior
extensor
extensor
2 & 3
lateral

Question 18

five forearm muscles that the deep branch of the radial n. in the forearm supply

Answer 18

extensor carpi ulnaris
extensor carpi radialis brevis
extensor digitorum
extensor digiti minimi
extensor pollicis brevis
abductor pollicus longus
supinator

Question 19

the posterior interosseous nerve, the terminal nerve branch of the deep radial n. branch supplies these two muscles

Answer 19

extensor pollicis longus

extensor indicus

Question 20

the radial n sends ___ branches to the shoulder and wrist

Answer 20

articular