UE Neurology

Question 1

what 2 nerves have all 5 anterior rami in them?

Answer 1

radial nerve and median nerve

Question 2

what 3 nerves come off the “M” in the brachial plexus?

Answer 2

musculocutaneous nerve, median nerve, ulnar nerve

Question 3

which cord(s) supplies teres minor?

Answer 3

posterior

Question 4

which cord(s) supplies teres major?

Answer 4

posterior

Question 5

which cord(s) supplies pectoralis major?

Answer 5

lateral and medial

Question 6

what nerve supplies the superior lateral arm skin? which cord is it from?

Answer 6

superior lateral brachial cutaneous nerve

Posterior Cord

Question 7

which muscle does not require innervation by C7 anterior rami?

A. pectoralis major m.
B. teres major m.
C. coracobrachialis m.
D. latissimus dorsi m.

Answer 7

B. teres major m. (only C5 and C6)

Question 8

which muscle does not require innervation by C8 anterior rami? 
A. latissimus dorsi
B. pectoralis major
C. pectoralis minor
D. subscapularis

Answer 8

D. subscapularis (only C5 and C6)

Question 9

what is the ligament that the suprascapular nerve goes under?

Answer 9

transverse scapular l.

Question 10

which anterior rami supply serratous anterior m? what nerve do they make?

Answer 10

C5-C7, long thoracic N

Question 11

which nerve supplies the medial arm skin? what anterior rami are in it?

Answer 11

medial brachial cutaneous nerve, C8 and T1

Question 12

which anterior rami supply the skin of the lateral forearm? what nerve is this?

Answer 12

C5 and C6, lateral antebrachial cutaneous nerve

Question 13

what are the 5 terminal branches?

Answer 13

musculocutaneous N, axillary N, radian N, median N, ulnar N

Question 14

what muscle does the deep radial artery supply when it changes its name? what is the name change?

Answer 14

supinator, posterior interosseous nerve

Question 15

flexor pollicis brevis is innervated by?

Answer 15

1/2 deep ulnar nerve, 1/2 recurrent branch of median nerve

Question 16

damage to C3 and C4 results in damage to where? what nerve supplies this skin?

Answer 16

skin, neck, shoulder

supraclavicular N

Question 17

what anterior rami make up the thoracodorsal nerve?

Answer 17

C6, C7, C8

Question 18

the superficial ulnar N becomes what nerves in the fingers?

Answer 18

common palmar digital nerve, proper palmer digital nerve

Question 19

what nerve(s) turns into the proper and common palmar digital nerve?

Answer 19

median nerve and superficial ulnar nerve

Question 20

brachial plexus is divided into?

Answer 20

roots, trunks, divisions, cords, terminal branches

Question 21

cutting the superior trunk of the brachial plexus results in weakening of what muscles(s) and paralysis of what muscle(s)?

Answer 21

weakening: pectoralis major m., biceps brachii m., brachialis m., coracobrachialis m.
paralysis: none bc medial pectoral nerve innervates pectoralis major m. too, and the other muscles are innervated by the C7 anterior rami as well

Question 22

deltoid m. does not need which anterior rami?

A. C6
B. C7
C. C5

Answer 22

B. C7

Question 23

pt comes in complaining that their aconeus m. has weakened. What cord do you suspect there is an issue in?

Answer 23

posterior cord

Question 24

pt has a problem rotating their glenoid cavity upwards and protracting their scapula. which anterior rami do you suspect is affected?

A. C5
B. T1
C. C8

what artery runs next to the affected nerve?

Answer 24

A. C5

lateral thoracic artery bc the serratous anterior muscle is affected.

Question 25

Pt presents in a “Waiters tip position”. After examining him you determine he damaged C6/C5 anterior rami. What are his motor deficits? What part of the plexus is injured?

Answer 25

Deficits :adduction, medial rotation, extended elbow Superior Plexus Injury

Question 26

Pt presents with Klumpke paralysis. Which nerve root is affected ?

Answer 26

T1 and C8 for ulnar nerve This condition is also known as claw hand . IN this case Ulnar N. is damaged and therefore INFERIOR plexus injury

Question 27

Pt has weakened flexion, extension and abduction of the humerus. What part of the brachial plexus is damaged?

Answer 27

Posterior Cord : Axillary N.

Question 28

Pt presents with his lack of flexion in his index finger and middle finger. What nerve of the brachial plexus is injured? What part of the arm is injured

Answer 28

lateral and medial cord: Median N. THINK: “ hand of benediction” Injury to medial nerve in elbow

Question 29

Pt comes in with weekened bicep reflex. What part of the brachial plexus is injured ?

Answer 29

Lateral Cord affecting Musculocutaneous N.

Question 30

Patient presents with wrist drop. What nerve is affected? What cord is it derived from?

Answer 30

Radial, Posterior Cord

Question 31

In a physical exam, a provider found a weakness of the patient's right wrist with poor finger flexion, pronation, and thumb opposition, resembling the "ape hand." On which nerve of the brachial plexus does the lesion lie? a. Median b. Axillary c. Ulnar d. Radial

Answer 31

A. Median

Question 32

The nerves which innervate the muscles and skin of the thumb are derived from the brachial plexus via its: A. Medial and lateral cord B. Posterior cord C. Medial cord D. Medial, lateral and posterior

Answer 32

D. medial, lateral, and posterior (radial nerve and median nerve)

Question 33

He says that kids at school make fun of him because his back does "something weird." You take a look and note that he is experiencing scapular winging. What spinal nerves are associated with this young man's problem? a. C8 and C7 b. T1, C6, C5 c. C7, C6, T1 d. C5, C6, C7

Answer 33

C5, C6, C7

Question 34

A pt comes into your office looking a bit embarrassed. He is unable to wipe his butt when using the toilet. What nerve is associated with his problem? a. Suprascapular b. Radial c. Ulnar d. Thoracodorsal e. Median

Answer 34

D.

Question 35

Which of these nerves has been injured if the patient cannot abduct their arm? Radial N. Axillary N. Ulnar N. Sciatic N.

Answer 35

Axillary N.

Question 36

Patient presents with claw hand. What nerve has been affected? a. Radial b. Ulnar c. Long thoracic N d. Median N.

Answer 36

Ulnar N.

Question 37

Which nerves make up the median N.?

Answer 37

C5,6,7,8 and T1

Question 38

Injury to the middle trunk of the brachial plexus would affect what muscles?

Answer 38

Latissimus dorsi M. Pectoralis major m Coracobrachialis Etc

Question 39

What nerves form the superior trunk of the brachial plexus?

Answer 39

C5 and C6

Question 40

Which nerves would be damaged if the lateral cord was severed?

Answer 40

Musculocutaneous N. lateral antebrachial cutaneous nerve Lateral Pectoral N.

Question 41

The median nerve innervates most muscles of the anterior compartment, except :

Answer 41

1. flexor carpi ulnaris | 2. medial part of the flexor digitorum profundus.