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Anatomy (Richie) > Arm, Forearm, Brachial Plexus > Flashcards

Arm, Forearm, Brachial Plexus Flashcards

1
Q

Which is the biggest branch of the axillary artery?

A

Subscapular branch (can’t miss it)

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2
Q

What are the only 2 branches that originate from TRUNKS of the brachial plexus?

A
  1. Suprascapular nerve (easy to pick out)

2. Subclavius nerve

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3
Q

If your thumb goes numb…

A

you lost the c6 root somehow.

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4
Q

Erb’s palsy

A

upper root damage

“Waiter’s tip”

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5
Q

Klumpky’s palsy

A

lower root damage
“Claw” hand
Problems with flexors

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6
Q

Ulnar lesion in forearm

A 
Ulnar claw (look's like saint's hands)
Can't extend ring and 5th finger
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7
Q

Pope’s blessing

A

Looks like ulnar lesion but its a MEDIAN nerve lesion. It’s an active thing, not a passive thing. You can only flex ring and pinky. Thenar wasting.

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8
Q

Pushup trouble

A

Can’t protract scapula. Messed up Long thoracic n.

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9
Q

Wrist drop

A

Break anatomical head of humerus, break radial nerve.

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10
Q

Suprascapular nerve lesion

A

Neurofibromatosis disease

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11
Q

Destroy C5 and C6. Which nerve gets affected?

A

Axillary n. (assassinate)

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12
Q

If you hang from a branch, and rip part of the brachial plexus?

A

Klumpke’s palsy

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13
Q

Is the dorsal root ganglion part of the CNS or PNS?

A

PNS because it’s OUTSIDE of the dura mater.

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14
Q

What is the nerve root for the greater occipital nerve?

A

C2

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15
Q

Does C2 come off above or below the atlas?

A

BELOW the atlas.

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16
Q

T/F: The 8 cervical nerves come off ABOVE their respective vertebrae.

A

FALSE. Only C1-C7 come off above the vertebrae. C8 comes off below C7.

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17
Q

What are the two ways to tag the vertebral artery, so far?

A
  1. Via Sub-occipital triangle

2. Via Sub-clavian artery (VITC thing)

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18
Q

Which cervical vertebrae has the WIDEST transverse process?

A

C1 (atlas)

So that obliquus captitis inferior and superior muscles can attach for torsional movement…

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19
Q

What muscle does the greater occipital nerve innervate?

A

NONE! Greater occipital n. is only sensory!

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20
Q

What muscles do C1 innervate?

A

Sub-occipital triangle muscles.

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21
Q

Name the spinous processes attached to C1.

A

NONE.

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22
Q

Spiral groove

A

radial nerve runs there.

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23
Q

flexors

A

medial epicondyle

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24
Q

extensors

A

lateral epicondyle

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25
Q

Which dermatomes are on the hand?

A

C6 C7 C8

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26
Q

The long head of biceps attaches to the…

A

supraglenoid tubercle.

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27
Q

The short head of biceps attaches to the…

A

coracoid process…

28
Q

What covers and protects the median nerve and brachial artery?

A

Bicipital aponeurosis

29
Q

Primary function of biceps?

A

supination and flexion

30
Q

Which enhances flexion of biceps?

A

Supination, not pronation

31
Q

Ulnar tuberosity…

A

Brachialis

32
Q

Does corachobrachialis help with flexion of the forearm?

A

No. Flexion of arm.

33
Q

What pierces the coracobrachialis muscle?

A

Musculocutaneous nerve

34
Q

What innervates the triceps?

A

Radial nerve

35
Q

Which is the workhorse for active resistance - lateral, long, or medial head of triceps?

A

Lateral head

36
Q

Which head of the triceps extends the arm?

A

Long head

37
Q

What artery perfuses the posterior compartment of arm?

A

Profunda brachii a.
Superior ulnar collateral a
inferior ulnar collateral a.

38
Q

Branching of radial a and ulnar occurs where usually?

A

Cubital fossa

39
Q

Anterior compartment arm nerve?

A

musculocutaneous n.

40
Q

Do ulnar and median n. innervate the arm?

A

No!

41
Q

What’s in the medial epicondyle of the humerus?

A

Ulnar n.

42
Q

Once the musculocutaneous n. finishes with muscles in anterior compartment, it becomes

A

lateral antebrachial cutaneous n.

43
Q

Damage musculocutaneous n…

A

weak flexion of elbow

44
Q

What nerve runs with the brachial artery?

A

Median nerve (rolls over top of brachial a)

45
Q

What prevents bow-stringing of the tendons in the wrist when you extend the wrist?

A

Extensor retinaculum

46
Q

What prevents bow-stringing of the tendons in the wrist when you flex the wrist?

A

Flexor retinaculum

47
Q

How many structures run through carpel tunnel?

A

10 (median nerve + 9 tendons)

48
Q

Canal of Guyon. What’s in it?

A

Ulnar artery and ulnar nerve

49
Q

posterior compartment is smaller or bigger than anterior compartment of forearm?

A

smaller

50
Q

Posterior interoseous n. is branch off

A

radial n.

51
Q

Superficial flexor muscles of forearm originate on

A

medial epicondyle of humerus

52
Q

Which forearm flexor muscle inserts on the thick aponeurosis on the palm?

A

Flexor carpi ulnaris m.

53
Q

Thumb flexor

A

Flexor pollicis longus m.

54
Q

Two pronators of forearm

A

pronator terres and pronator quadratus

55
Q

can the ulna rotate?

A

no the radius rotates with respect to ulna

56
Q

Extensors of the forearm are innervated by

A

radial n

57
Q

Can the brachioradialis flex elbow?

A

Yes. It originates from humerus.

58
Q

What extends the pinky?

A

Extensor digiti minimi m.

59
Q

What two muscles supinate the forearm?

A

Biceps and supinator

60
Q

What extends the index finger?

A

extensor carpi radialis longus m.

61
Q

What three muscles go to thumb?

A

Extensor pollicus longus m
extensor pollicis brevis m.
Abductor policus longus m.

62
Q

What runs through the anatomical snuff box?

A

radial artery

63
Q

Common interosseous a divides into

A

anterior and posterior interosseous a; both run closely to the interosseous membrane

64
Q

Most superficial tendon in forearm, that doesn’t go through carpel tunnel (it pops out)

A

palmaris longus tendon

65
Q

Thenar muscles and 1st/2nd lumbrical will hurt if

A

compress median nerve (carpel tunnel)

66
Q

What arteries anastomoses around the elbow?

A

Profunda brachii, superior ulnar collateral a., and inferior ulnar collateral a.

Anatomy (Richie) (18 decks)

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