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a10. MSK (Anatomy: Upper limb) > 2.1.2. Muscles of the Anterior (Flexor) Compartment of the Upper Arm > Flashcards

2.1.2. Muscles of the Anterior (Flexor) Compartment of the Upper Arm Flashcards

1
Q

Where does the Arm extend:
1. From?
2. To?

A
  1. Shoulder
  2. Elbow
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2
Q

What are the 2 Compartments of the Arm?

A
  1. Anterior (Flexor)
  2. Posterior (Extensor)
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3
Q

What are the 3 Muscles of the Anterior (Flexor) Compartment?

A
  1. Biceps Brachii
  2. Coracobrachialis
  3. Brachialis
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4
Q

What innervates the Muscles of the Anterior (Flexor) Compartment?

A

The Musculocutaneous Nerve

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5
Q

What is the Arterial Supply for the Muscles of the Anterior (Flexor) Compartment?

A

Muscular Branches of the Brachial Artery

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6
Q

Which of the Muscles of the Anterior (Flexor) Compartment, is the most Anterior?

A

Biceps Brachii

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7
Q

How many heads does the Biceps Brachii have?

A

2

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8
Q

What are the 2 Heads of the Biceps Brachii?

A
  1. Long Head
  2. Short Head
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9
Q

Where does the Long Head of the Biceps Brachii originate from?

A

Supraglenoid Tubercle of the Scapula

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10
Q

Where does the Short Head of the Biceps Brachii originate from?

A

Coracoid Process of the Scapula

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11
Q

Where is most of the Muscle Mass of the Biceps Brachii contained?

A

Anteriorly to the humerus

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12
Q

Is the Biceps Brachii attaches to the Humerus?

A

No

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13
Q

What happens to the tendon of the Biceps Brachii as it enters the Forearm?

A

A Connective Tissue Sheath is given off

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14
Q

What is the name of the Connective Tissue Sheath, given off as the Biceps Brachii Tendon enters the Forearm?

A

Bicipital Aponeurosis

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15
Q

What is the function of the Bicipital Aponeurosis?

A

Forms the Roof of the Cubital Fossa

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16
Q

What does the Bicipital Aponeurosis blend with?

A

The Deep Fascia of the Anterior Forearm

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17
Q

Where do the 2 Heads of the Biceps Brachii unite?

A

In the Distal 1/3 of the Upper Arm

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18
Q

Where does the Tendon of the Biceps Brachii attach Distally?

A
  1. Radial Tuberosity
  2. Fascia of the Forearm (Via the Bicipital Aponeurosis)
19
Q

What is the function of the Biceps Brachii?

A
  1. Supination of the Forearm
  2. Flexion of the Arm at the Elbow
  3. Flexion of the Arm at the Shoulder
20
Q

What is the innervation of the Biceps Brachii?

A

Musculocutaneous Nerve

21
Q

What is the Biceps Tendon Reflex testing?

A

C6

22
Q

Where does the Coracobrachialis lie, in relation to the Biceps Brachii?

A

Deep

23
Q

How is the Coracobrachialis described?

A

A Slender, Rounded Muscle

24
Q

Where does the Coracobrachialis originate from?

A

Coracoid Process of the Scapula

25
Q

Where does the Coracobrachialis travel?

A

Through the Axilla

26
Q

Where does the Coracobrachialis attach to distally?

A

Medial Margin of the Humeral Shaft, at the level of the Deltoid Tubercle (About the Midline)

27
Q

What is the function of the Coracobrachialis?

A
  1. Flexion of the Arm at the Shoulder
  2. Weak Adduction of the Arm at the Shoulder
28
Q

What is the innervation of the Coracobrachialis?

A

Musculocutaneous Nerve

29
Q

Where does the Brachialis lie, in relation to the Biceps Brachii?

A

Deep

30
Q

Where does the Brachialis lie, in relation to the Coracobrachialis?

A

Distally

31
Q

How is the Brachialis described?

A

A Strong Muscle

32
Q

Where does the Brachialis originate from?

A

Anterior, Medial and Lateral, Surfaces of the Distal Half of the Humeral Shaft

33
Q

Where does the Brachialis muscle attach distally?

A
  1. The Coronoid Process of the Ulnar
  2. The Ulnar Tuberosity (just Distal to the Elbow Joint)
34
Q

What is the function of the Brachialis?

A

Flexion of the Elbow

35
Q

What is the innervation of the Brachialis?

A
  1. Musculocutaneous Nerve
  2. With Contribution from the Radial Nerve
36
Q

What does the Musculocutaneous Nerve arise from?

A

The Lateral Cord of the Brachial Plexus

37
Q

How does the Musculocutaneous Nerve enter into the Arm?

A

By Perforating the Coracobrachialis

38
Q

Where does the Musculocutaneous Nerve travel?

A

It descends between the Biceps Brachii and Brachialis Muscles

39
Q

What does the Musculocutaneous Nerve continue as?

A

Lateral Cutaneous Nerve of the Forearm

40
Q

What is the Segmental (or Root) Value of the Musculocutaneous Nerve?

A
  1. C5
  2. C6
  3. C7
41
Q

What are the Muscles Supplied by the Musculocutaneous Nerve?

A
  1. Biceps Brachii
  2. Coracobrachialis
  3. Brachialis
42
Q

From which part of the Forearm does the Musculocutaneous Nerve carry Cutaneous Sensations?

A

The Lateral Part of the Forearm

43
Q

Does the Musculocutaneous Nerve supply any Muscles in the Forearm / Hand?

A

No

a10. MSK (Anatomy: Upper limb) (48 decks)

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