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PNS Exam III > Brachial Plexus > Flashcards

Brachial Plexus Flashcards

1
Q

What forms the Brachial plexus

A

Anterior primary rami of C5 through T1

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2
Q

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

A

2nd part of the axillary a.

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3
Q

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

A

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

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4
Q

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

A

Dorsal Scapular n. (C5)

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5
Q

What n. supplies the serratus anterior

A

Long Thoracic n.

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6
Q

What n. supplies the Supraspinatus and Infraspinatus

A

Suprascapular n.

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7
Q

What n. supplies the subclavius

A

N. to the Subclavius

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8
Q

What n. supplies ONLY the pectoralis major

A

Lat. Pectoral n.

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9
Q

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

A

Musculocutaneous

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10
Q

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

A

Lat. cutaneous n. of the forearm

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11
Q

What n. supplies the pectoralis major and minor

A

Medial Pectoral n.

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12
Q

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

A

Medial cutaneous n. of the arm

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13
Q

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

A

Medial cutaneous n. of the forearm

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14
Q

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

A

Ulnar n.

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15
Q

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

A

Ulnar n.

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16
Q

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

A

Superficial to the flexor retinaculum

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17
Q

What 3 m. make up the hypothenar m.

A

Abd. digiti minimi
Flexor digiti minimi brevis
Opponens digiti minimi

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18
Q

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

A

Ulnar

19
Q

What condition may result from ulnar n. damage

A

Claw/Ape hand

20
Q

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

A

Median n.

21
Q

What n. supplies both the pronator teres and pronator quadratus

A

Median n.

22
Q

What does the median n. pass through in the wrist

A

Carpal tunnel

23
Q

What m. make up the Thenar m.

A

Abd. pollicis brevis
Flexor pollicis brevis
Opponens pollicis

24
Q

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

A

Hand of oath/benediction
Carpal tunnel syndrome
Unable to pronate

25
Q

What is the Hand of Oath/Benediction

A

Open fist, 4th and 5th digits stay flexed

26
Q

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

A

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

27
Q

What n. supplies only the subscapularis

A

Superior subscapular n.

28
Q

What n. supplies the subscapularis and teres major

A

Inferior subscapular n.

29
Q

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

A

Thoracodorsal n.

30
Q

What n. supplies the deltoid and teres minor

A

Axillary n.

31
Q

What sensory branch is given off of the axillary n.

A

Superior Lateral Cutaneous n. of the arm

32
Q

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

A

Radial n.

33
Q

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

A

Post. interosseous n.

34
Q

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

A

Post. cutaneous n. of the arm

35
Q

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

A

Inf. Lat. cutaneous n. of the arm

36
Q

What 2 m. does the radial n. supply

A

All 3 heads of triceps brachii

Anconeus

37
Q

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

A

Post. cutaneous n. of the forearm

38
Q

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

A

Brachioradialis

Extensor carpi radialis longus

39
Q

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

A

Wrist drop

Tricep and brachioradialis reflexes

40
Q

What brachial plexus injury is supraclavicular

A

Erb-Duchenne

41
Q

What brachial plexus injury is infraclavicular

A

Dejerine-Klumpke

42
Q

What is the MC cause of brachial plexus injuries

A

Birth trauma

43
Q

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

A

Erb-Duchenne

44
Q

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

A

Dejerine-Klumpke

PNS Exam III (4 decks)

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