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Anatomy Exam 2 > Brachial Plexus > Flashcards

Brachial Plexus Flashcards

1
Q

Label the 5 parts of the brachiel plexus in order

A

Rami

Trunk

Divisions

Cords

Branches

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2
Q

The brachial plexus includes what nerve levels?

A

C5 to T1, but also gets help from C4

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3
Q

The brachial plexus eventually becomes ___ periphrial nerves

A

5 periphrial nerves

musculocutaneous, median, ulnar, axillary, and radial nerves

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4
Q

The parent structure of the Musculocutaneous nerve is the

A

Lateral Cord of brachial plexus

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5
Q

The parent structure of the radial nerve is the

A

Posterior Cord of brachial plexus

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6
Q

The parent structure of the axillary nerve is the

A

Posterior Cord of the brachial plexus

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7
Q

The parent structure of the median nerve is the

A

Lateral and Medial cords of the brachial plexus

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8
Q

The parent structure of the ulnar nerve is the

A

Medial cord of the brachial plexus

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9
Q

Identify 3 (it’s a peripheral nerve)

A

Musculocutaneous Nerve

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10
Q

Identify 4 (it’s a peripheral nerve)

A

Axillary Nerve

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11
Q

Identify 6

A

Long Thoracic Nerve

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12
Q

Identify 7

A

Radial Nerve

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13
Q

Identify 8

A

Median Nerve

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14
Q

Identify 9

A

Ulnar Nerve

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15
Q

Identify 1

A

Posterior Cord

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16
Q

Identify 2

A

Subclavian artery

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17
Q

Identify 3

A

Lateral cord

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18
Q

Identify 5

A

Musculocutaneous nerve

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19
Q

Identify 6

A

Median Nerve

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20
Q

The brachial plexus comes out of the neck between what two muscles?

A

Anterior and middle scalene

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21
Q

The anterior scalene AND the middle scalene Inferiorly attaches to the

A

First rib

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22
Q

The anterior scalene superiorly attaches to the

A

TP of C3-6

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23
Q

The anterior scalene is innervated by

A

Cervical spinal nerve C4 to C6

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24
Q

The two muscle actions of the anterior scalene and middle scalene are….

A

Flex the neck laterally

Elevates the first rib during forced inhalation

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25
Q

The superior attachment of the middle scalene AND the Posterior scalene is…

A

TP of C5-7

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26
Q

The posterior scalene inferiorly attaches to the _____ and it’s muscle actions are _____

A

second rib.

Elevate the second rib with forced inhalation, and flex the neck laterally

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27
Q

The innervation of the posterior scalene is…

A

Anterior rami of cervical spinal nerves C7 and C8

28
Q

Quadrangular Space’s four borders include the…

A

the inferior margin of the teres minor

the surgical neck of the humerus

the superior margin of the teres major

the lateral margin of the long head of the
triceps brachii.

29
Q

The contents of the quadrangular space include

A

axillary nerve and the posterior
circumflex humeral artery

30
Q

The 3 borders of the triangular space are..

A

the medial margin of the long
head of the triceps brachii

the superior margin of the teres
major

the inferior margin of the teres
minor

31
Q

What two structures run through the triangular space

A

circumflex scapular artery and vein

32
Q

What are the borders of the triangular interval

A

the lateral margin of the long
head of the triceps brachii

the shaft of the humerus

the inferior margin of the
teres major

33
Q

What structures run through the Triangular interval

A

profunda brachii artery and radial nerve

34
Q

Will compression of a periphrial nerve present in a dermatome pattern?

A

No, it will only effect the areas supplied by that specific periphrial nerve

35
Q

What is the ONLY synovial joint between the axial and appendicular skeleton

A

Sternoclavicular joint

36
Q

The main blood supply of the upper extremity is the

A

Brachial artery

37
Q

What are the 3 muscles of the flexor compartment?

A

Biceps brachii
Coracobrachialis
Brachialis

38
Q

What nerve Usually pierces coracobrachialis?

A

Musculocutaneous Nerve

39
Q

The brachial artery is found in the _____ compartment

A

Flexor compartment

40
Q

What are the muscle actions of the Biceps Brachii

A

Supinates forearm

Flexes elbow

Short head resists dislocation of shoulder

41
Q

Where does the Biceps Brachii SHORT HEAD proximally attach

A

coracoid process of scapula

42
Q

Where does the Biceps Brachii LONG HEAD proximally attach

A

supraglenoid tubercle of scapula

43
Q

what is the clinical sign of a Proximal bicep rupture called?

A

Popeyes sign

sidenote: You do not always need surgery for this, depends on your age.

44
Q

What is the muscle action of the brachialis

A

Flexes the elbow in all positions

45
Q

What is the proximal attachment of the Brachialis

A

Distal half of anterior surface of humerus

46
Q

What is the DISTAL attachment of the brachialis

A

Ulnar tuberosity and coronoid process of ulna

47
Q

What is the innervation of the brachialis

A

Musculocutaneous nerve C5 C6

48
Q

What is this muscle and the structure it attaches to?

A

Brachialis, Tuberosity of Ulna

49
Q

The brachioradialis is innervated by the

A

Radial nerve C5 (C6) C7

50
Q

The actions of the brachioradialis are…

A

Flex the elbow in a mid-pronated position (at the Humero-ulnar joint)

Assist to pronate and supinate the forearm when the movements are resisted from end range. (at the humero-radial joint)

51
Q

What is the proximal attachment of the Brachioradialis

A

The lateral supra-epicondylar ridge of humerus

52
Q

What is the distal attachment of the brachioradialis

A

Lateral Surface of distal end of radius (proximal to styloid process)

53
Q

What nerve provides motor innervation to all muscles of the anterior upper arm, and sensory information to the skin of lateral forearm

A

Musculocutaneous

54
Q

What artery and what nerve is found in the extensor compartment of the upper arm?

A

Deep Brachial Artery, Radial Nerve (C5 to T1)

55
Q

What 3 nerves make the M in the Brachial Plexus? Name them from Medial to Lateral.

A

Most Medial: Ulnar Nerve

Median Nerve

Most Lateral: Musculocutaneous Nerve

56
Q

What Rami feed into the Lateral Cord of the Brachial Plexus

A

C5 C6 and C7

57
Q

What Rami feeds into the Medial cord of the Brachial Plexus

58
Q

True or false: The posterior Cord has connection to every Rami in the brachial plexus.

A

True. It is fed from the poterior cord of every Division.

59
Q

What nerves arise from the poserior cord of the brachial plexus?

A

Lower Subscapular

Thoracodorsal

Upper Subscapular

Additionally: Axillary and Radial Nerve

60
Q

What nerves arise from the medial cord of the brachial plexus? (not branches)

A

Medial Antebrachial Cutaneous Nerve

Medial Brachial Cutaneous Nerve

Medial Pectoral Nerve

61
Q

What nerves arises from the lateral cord of the Brachial Plexus

A

Lateral Pectoral Nerve

Musculocutaneous Nerve

And the Median Nerve

62
Q

What muscle is innervated by the entire Brachial Plexus Rami?

A

Pectoralis Major

63
Q

C8 and T1 supply the _____ cord of the brachial plexus

A

Medial cord

And the Posterior Cord

64
Q

What is the most lateral nerve of the Brachial Plexus

A

Musculocutaneous nerve

65
Q

Identify the sternal and the acromial end of the clavicle

Anatomy Exam 2 (10 decks)

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