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PNS exam III - mine > Brachial plexus - Part 3 > Flashcards

Brachial plexus - Part 3 Flashcards

1
Q

The ulnar nerve travels deep to the flexor carpi ulnaris, passes __________ to the _________ and then divides into two branches.

A

Superficial **

Flexor retinaculum**

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2
Q

Once pass the flexor retinaculum, the ulnar nerve divides into which two branches?

A

Superficial and deep

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3
Q

The superficial branches of the ulnar nerve divides into three terminal branches called what?

A

Proper palmar branches

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4
Q

The proper palmar branches supply what?

A

Palmar aspect of the little finger and

Medial half of the ring finger

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5
Q

The deep branch of the ulnar nerve curves towards what in the hand?

A

Thenar eminence

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6
Q

The deep branch of the ulnar nerve gives off branches in the hand to supply what muscles? (7)

A 
Abductor digiti minimi
Flexor digiti minimi brevis
Opponent digiti Minami
Adjustor policies
Deep head of the flexor pollicis brevis
All interossei (dorsal and palmar)
Lumbricals (3 and 4)
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7
Q

Damage to the ulnar nerve can cause what?

A 
Claw hand (aka ape hand)
(atrophy thenar muscles too)
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8
Q

Claw hand involves all digits. Why?

A

Because ulnar innervates ALL interossei muscles

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9
Q

What are the five possible crush injuries sites?

A 
IVF
Scalene triangle
Brachial plexus
Posterior medial epicondyle (elbow)
Flexor retinaculum
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10
Q

The median nerve contains fibers from what two cords?

A

Medial and lateral cords

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11
Q

The median nerve contains fibers from what nerves?

A

C6, C7, C8, and T1

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12
Q

Does the median nerve give off branches in the arm?

A

No

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13
Q

The median nerve travels through the arm in what?

A

Medial bicipital sulcus

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14
Q

The median nerve crosses the elbow on which side?

A

Anterior side

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15
Q

The median nerve enters the forearm after passing through what?

A

Two heads of the pronator teres

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16
Q

The median nerve innervates what muscles of the forearm?

A

Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor digitorum superficialis

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17
Q

The other three muscles of the forearm that the median nerve innervates is by way of what nerve? Given off where?

A

Anterior interosseous nerve of the forearm

At the elbow

18
Q

What muscles does the anterior interosseous nerve of the forearm supply?

A

Pronator quadratus
Flexor pollicis longus
Lateral bellies of flexor digitorum profundus

19
Q

What branch of the median nerve is given off in the distal third of the forearm?

A

Palmar branch of the median nerve

20
Q

The palmar branch of the median nerve supplies what?

A

Skin of the thenar eminence, lateral wrist, and palm

21
Q

The median nerve passes through what near the wrist?

A

Carpal tunnel

22
Q

After passing through the carpal tunnel, the median nerve divides into what?

A

Common palmar digital nerves

23
Q

The common palmar digital nerves supply what?

A

1st two lumbricals

24
Q

The 1st common palmer digital nerve supplies what?

A

(thenar muscles)
Abductor pollicis brevis
Flexor pollicis brevis - superficial head
Opponent pollicis

25
Q

Each common palmar digital nerve splits into what?

A

Proper palmar digital nerves

26
Q

Are the proper palmar digital nerves motor or sensory?

A

sensory

27
Q

The proper palmar digital nerves supply what?

A

Skin over lateral three and a half digits

28
Q

The median nerve also supplies what that is loaded with nociceptors?

A

periosteum

29
Q

What is the articular supply of the median nerve?

A

Elbow, radiocarpal, and midcarpal joints

30
Q

The median nerve usually communicates with which nerve at the wrist?

A

Ulnar nerve

31
Q

What are some things that can happen with damage to the median nerve?

A

hand of oath/benediction
Carpal tunnel syndrome
Unable to pronate

32
Q

Why would the median nerve make you unable to pronate?

A

Because it innervates the pronator teres and pronator quadratus

33
Q

Carpal tunnel syndrome is entrapment where?

A

Flexor retinaculum and carpal bones

34
Q

What is the “hand of oath/benediction”?

A

Try to make a fist but cannot close 4th and 5th digits

35
Q

What nerves/branches come off of the posterior cord? 5

A 
Superior subscapular nerve
thoracodorsal nerve
Inferior subscapular nerve
axillary nerve
Radial nerve
36
Q

What is the largest nerve coming off of the posterior cords?

A

Radial nerve

37
Q

The superior subscapular nerve contains fibers from what?

A

C5 and C6

38
Q

The superior subscapular nerve supplies what muscle

A

subscapularis (a rotator cuff)

39
Q

The thoracodorsal nerve contains fibers from what nerve?

A

C6, C7, and C8

40
Q

The thoracodorsal nerve travels along what? To supply what muscle?

A

Posterior axillary wall

latissimus dorsi

PNS exam III - mine (12 decks)

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