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anatomy > 4-1 (Arm) > Flashcards

4-1 (Arm) Flashcards

1
Q

Which muscles are found in the anterior compartment of the arm?

A
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2
Q

What nerve innervates the muscles of the anterior compartment of the arm?

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3
Q

Which muscle is located in the posterior compartment of the arm?

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4
Q

What nerve innervates the muscle in the posterior compartment of the arm?

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5
Q

What is the primary function of the muscles in the anterior compartment of the arm?

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6
Q

What is the primary function of the muscle in the posterior compartment of the arm?

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7
Q

Which compartment of the arm is involved in flexion at the elbow joint?

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8
Q

Which compartment of the arm is responsible for extension of the forearm at the elbow joint?

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9
Q

Which compartment of the arm contributes to supination of the forearm?

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10
Q

What is the origin of the coracobrachialis muscle?

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11
Q

What is the function of the brachialis muscle?

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12
Q

What is the insertion of the coracobrachialis muscle?

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13
Q

What nerve innervates the brachialis muscle?

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14
Q

Where does the long head of the triceps brachii muscle originate?

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15
Q

What is the insertion of the triceps brachii muscle?

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16
Q

Which nerve innervates the triceps brachii muscle?

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17
Q

What is the function of the long head of the triceps brachii besides extending the forearm?

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18
Q

What are the boundaries of the triangular interval?

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19
Q

What important structures pass through the triangular interval?

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20
Q

Where does the long head of the biceps brachii muscle originate?

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21
Q

Where does the short head of the biceps brachii muscle originate?

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22
Q

What is the origin of the brachialis muscle?

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23
Q

Where does the coracobrachialis muscle insert?

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24
Q

Where does the biceps brachii muscle insert?

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25
Q

Where does the brachialis muscle insert?

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26
Q

Which muscle inserts on the radial tuberosity?

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27
Q

Which muscle inserts on the tuberosity of the ulna?

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28
Q

What structure does the coracobrachialis insert into on the humerus?

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29
Q

Which major artery is found in the anterior compartment of the arm?

A

The brachial artery.

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30
Q

What artery does the brachial artery continue from?

A

The axillary artery.

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31
Q

At what point does the axillary artery become the brachial artery?

A

At the lower border of the teres major muscle

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32
Q

Where does the brachial artery terminate?

A
  • Just distal to the elbow joint.
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33
Q

Into which two arteries does the brachial artery divide?

A

The radial and ulnar arteries.

34
Q

Where is the brachial artery located in the proximal arm?

A

On the medial side of the arm.

35
Q

Where does the brachial artery shift to in the distal arm?

A

It moves laterally to a position midway between the lateral and medial epicondyles of the humerus.

36
Q

Between which two structures does the brachial artery lie at the level of the elbow joint?

A

Between the lateral epicondyle and the medial epicondyle of the humerus.

37
Q

Can the brachial artery be palpated along its length?

A

Yes.

38
Q

Where can the brachial artery be compressed?

A
  • Against the medial side of the humerus, in the proximal arm.
39
Q

What are the major branches of the brachial artery in the arm?

A
  • Branches to adjacent muscles, two ulnar collateral vessels, the profunda brachii artery, and nutrient arteries to the humerus.
40
Q

Which artery is a major branch of the brachial artery and supplies the posterior compartment?

A

The profunda brachii artery.

41
Q

What is the largest branch of the brachial artery?

A
42
Q

Which compartment of the arm does the profunda brachii artery supply?

A
43
Q

With which nerve does the profunda brachii artery enter the posterior compartment of the arm?

A
44
Q

Through which anatomical space do the profunda brachii artery and radial nerve pass?

A
45
Q

Briefly explain the course of the profunda brachii artery and the radial nerve along the humerus.

A
46
Q

What are the two collateral arteries that the profunda brachii artery terminates into?

A
47
Q

Which arteries participate in anastomoses around the elbow joint?

A
48
Q

What are the two main branches of the brachial artery involved in anastomoses around the elbow joint?

A
49
Q

Which artery does the superior ulnar collateral artery anastomose with?

A
50
Q

Which artery does the inferior ulnar collateral artery anastomose with?

A
51
Q

Which artery does the middle collateral artery from the profunda brachii artery anastomose with?

A
52
Q

Which artery does the radial collateral artery from the profunda brachii artery anastomose with?

A
53
Q

What artery does the radial collateral artery anastomose with around the elbow joint?

A
54
Q

Which recurrent artery does the middle collateral artery anastomose with?

A
55
Q

What is the function of the collateral vessels formed by the termination of the profunda brachii artery?

A
56
Q

Which muscle does the radial nerve cross as it enters the arm?

A
57
Q

Where does the radial nerve lie in relation to the brachial artery upon entering the arm?

A
58
Q

Which artery accompanies the radial nerve as it enters the posterior compartment of the arm?

A
59
Q

Through which anatomical space does the radial nerve enter the posterior compartment of the arm?

A

The triangular interval.

60
Q

As the radial nerve passes through the posterior compartment, where does it lie?

A

In the radial groove directly on the bone.

61
Q

How does the radial nerve travel through the posterior compartment of the arm?

A

Diagonally from medial to lateral.

62
Q

What structure does the radial nerve pass through to enter the anterior compartment of the arm?

A

The lateral intermuscular septum.

63
Q

Between which two muscles does the radial nerve lie in the anterior compartment of the arm?

A

Between the brachialis muscle and the brachioradialis muscle.

64
Q

Where does the radial nerve enter the forearm?

A
  • Anterior to the lateral epicondyle of the humerus, just deep to the brachioradialis muscle.
65
Q

What are the muscular branches of the radial nerve?

A
  • Muscles include the triceps brachii, brachioradialis, and extensor carpi radialis longus.
66
Q

Which muscles receive muscular branches from the radial nerve?

A

Triceps brachii, brachioradialis, and extensor carpi radialis longus.

67
Q

What are the cutaneous branches of the radial nerve that originate in the posterior compartment of the arm?

A

The inferior lateral cutaneous nerve of the arm and the posterior cutaneous nerve of the forearm.

68
Q

Which cutaneous nerve of the radial nerve provides sensation to the posterior forearm?

A

The posterior cutaneous nerve of the forearm.

69
Q

What is the primary function of the radial nerve?

A
  • To provide motor innervation to the extensor muscles of the arm and forearm and sensory innervation to the skin.
69
Q

What movements are primarily affected by injury to the radial nerve?

A
  • Extension of the elbow, wrist drop, and loss of sensation in the posterior arm and forearm.
70
Q

Where does the musculocutaneous nerve leave the axilla?

A

It leaves the axilla by passing through the coracobrachialis muscle.

71
Q

Through which muscle does the musculocutaneous nerve enter the arm?

A
  • The coracobrachialis muscle.
72
Q

In which plane does the musculocutaneous nerve pass down the arm?

A

In the plane between the biceps brachii and brachialis muscles.

73
Q

Which two muscles does the musculocutaneous nerve lie between as it travels down the arm?

A

The biceps brachii and brachialis muscles.

74
Q

What does the musculocutaneous nerve do after giving rise to motor branches in the arm?

A

It emerges laterally to the tendon of the biceps brachii muscle at the elbow and continues as the lateral cutaneous nerve of the forearm.

75
Q

What does the musculocutaneous nerve continue as at the elbow?

A
  • The lateral cutaneous nerve of the forearm.
76
Q

What type of innervation does the musculocutaneous nerve provide to the anterior compartment of the arm?

A
  • Motor innervation.
77
Q

Which muscles receive motor innervation from the musculocutaneous nerve?

A

All muscles in the anterior compartment of the arm, including the coracobrachialis, biceps brachii, and brachialis.

78
Q

Which area of the forearm does the musculocutaneous nerve provide sensory innervation to?

A
  • The lateral surface of the forearm
79
Q

What are the primary functions of the musculocutaneous nerve?

A
  • To provide motor innervation to the anterior compartment muscles of the arm and sensory innervation to the skin on the lateral surface of the forearm.
80
Q

What movements would be affected by an injury to the musculocutaneous nerve?

A
  • Flexion at the elbow and supination of the forearm would be affected, along with sensory loss on the lateral forearm.
81
Q
A

anatomy (7 decks)

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