Brachial Plexus

Question 1

What forms the Brachial plexus

Answer 1

Anterior primary rami of C5 through T1

Question 2

What are the cord names of the brachial plexus named in relation to

Answer 2

2nd part of the axillary a.

Question 3

What do the n. roots of the brachial plexus pass between

Answer 3

Ant. and middle scalene m. into the post. triangle

Question 4

What nerve supplies the levator scapula, rhomboid major, rhomboid minor

Answer 4

Dorsal Scapular n. (C5)

Question 5

What n. supplies the serratus anterior

Answer 5

Long Thoracic n.

Question 6

What n. supplies the Supraspinatus and Infraspinatus

Answer 6

Suprascapular n.

Question 7

What n. supplies the subclavius

Answer 7

N. to the Subclavius

Question 8

What n. supplies ONLY the pectoralis major

Answer 8

Lat. Pectoral n.

Question 9

What n. supplies the coracobrachialis, biceps brachii, and brachialis

Answer 9

Musculocutaneous

Question 10

What does the musculocutaneous n. become when it passes between the biceps brachii and brachialis goes into the forearm

Answer 10

Lat. cutaneous n. of the forearm

Question 11

What n. supplies the pectoralis major and minor

Answer 11

Medial Pectoral n.

Question 12

What n. supplies the skin on the ant. aspect of the arm between the axilla and elbow

Answer 12

Medial cutaneous n. of the arm

Question 13

What n. supplies the skin over the biceps brachii and over anterior and medial aspects of the forearm distal to the wrist

Answer 13

Medial cutaneous n. of the forearm

Question 14

What n. travels med. to the brachial a. in the medial bicpital sulcus/furrow, and gives off no branches in the arm

Answer 14

Ulnar n.

Question 15

What n. supplies the flexor carpi ulnaris and flexor digitorum profunduds

Answer 15

Ulnar n.

Question 16

What does the ulnar n. travel superficial to in the wrist

Answer 16

Superficial to the flexor retinaculum

Question 17

What 3 m. make up the hypothenar m.

Answer 17

Abd. digiti minimi
Flexor digiti minimi brevis
Opponens digiti minimi

Question 18

Which n. supplies a majority of the m. in the hand

Answer 18

Ulnar

Question 19

What condition may result from ulnar n. damage

Answer 19

Claw/Ape hand

Question 20

What n. travels in the medial bicipital furrow, gives off no branches in the arm, and crosses the elbow on the anterior side after passing between the two heads of the pronator teres

Answer 20

Median n.

Question 21

What n. supplies both the pronator teres and pronator quadratus

Answer 21

Median n.

Question 22

What does the median n. pass through in the wrist

Answer 22

Carpal tunnel

Question 23

What m. make up the Thenar m.

Answer 23

Abd. pollicis brevis
Flexor pollicis brevis
Opponens pollicis

Question 24

What are the 3 clinical considerations to remember when dealing with the median n.

Answer 24

Hand of oath/benediction
Carpal tunnel syndrome
Unable to pronate

Question 25

What is the Hand of Oath/Benediction

Answer 25

Open fist, 4th and 5th digits stay flexed

Question 26

When observing carpal tunnel, what kind of questions should you ask when it comes to "numbness"

Answer 26

Ask to determine if Parasthesia (pins and needles) or if they actually have no feeling

Question 27

What n. supplies only the subscapularis

Answer 27

Superior subscapular n.

Question 28

What n. supplies the subscapularis and teres major

Answer 28

Inferior subscapular n.

Question 29

What n. travels along the post. axillary wall to supply the latissimus dorsi

Answer 29

Thoracodorsal n.

Question 30

What n. supplies the deltoid and teres minor

Answer 30

Axillary n.

Question 31

What sensory branch is given off of the axillary n.

Answer 31

Superior Lateral Cutaneous n. of the arm

Question 32

What n. supplies all of the m. in the post. compartment of the arm and forearm and has some fibers which go to the brachialis

Answer 32

Radial n.

Question 33

What is does the deep branch of the radial n. terminate as after it penetrates the supinator m.

Answer 33

Post. interosseous n.

Question 34

What branch of the radial n. supplies the skin on the post. side of the upper arm

Answer 34

Post. cutaneous n. of the arm

Question 35

What branch of the radial n. branches off in the middle arm

Answer 35

Inf. Lat. cutaneous n. of the arm

Question 36

What 2 m. does the radial n. supply

Answer 36

All 3 heads of triceps brachii | Anconeus

Question 37

What branch of the radial n. supplies the narrow area of skin on the lat side of the post. forearm

Answer 37

Post. cutaneous n. of the forearm

Question 38

Branches of the radial n. given off at the level of the lat. epicondyle supply what 2 m.

Answer 38

Brachioradialis | Extensor carpi radialis longus

Question 39

What may be seen clinically if there is damage to the radial n.

Answer 39

Wrist drop | Tricep and brachioradialis reflexes

Question 40

What brachial plexus injury is supraclavicular

Answer 40

Erb-Duchenne

Question 41

What brachial plexus injury is infraclavicular

Answer 41

Dejerine-Klumpke

Question 42

What is the MC cause of brachial plexus injuries

Answer 42

Birth trauma

Question 43

Atrophy of associated m. and waiter's tip sign are seen with what

Answer 43

Erb-Duchenne

Question 44

Primarily hand m. and claw hand (can mimic Horner's Syndrome -> ptosis, miosis) are seen with what

Answer 44

Dejerine-Klumpke