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

Question 1

Where does the Arm extend:

1. From?
2. To?

Answer 1

1. Shoulder

2. Elbow

Question 2

What are the 2 Compartments of the Arm?

Answer 2

1. Anterior (Flexor)

2. Posterior (Extensor)

Question 3

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

Answer 3

1. Biceps Brachii
2. Coracobrachialis
3. Brachialis

Question 4

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

Answer 4

The Musculocutaneous Nerve

Question 5

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

Answer 5

Muscular Branches of the Brachial Artery

Question 6

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

Answer 6

Biceps Brachii

Question 7

How many heads does the Biceps Brachii have?

Answer 7

2

Question 8

What are the 2 Heads of the Biceps Brachii?

Answer 8

1. Long Head

2. Short Head

Question 9

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

Answer 9

Supraglenoid Tubercle of the Scapula

Question 10

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

Answer 10

Coracoid Process of the Scapula

Question 11

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

Answer 11

Anteriorly to the humerus

Question 12

Is the Biceps Brachii attaches to the Humerus?

Answer 12

No

Question 13

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

Answer 13

A Connective Tissue Sheath is given off

Question 14

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

Answer 14

Bicipital Aponeurosis

Question 15

What is the function of the Bicipital Aponeurosis?

Answer 15

Forms the Roof of the Cubital Fossa

Question 16

What does the Bicipital Aponeurosis blend with?

Answer 16

The Deep Fascia of the Anterior Forearm

Question 17

Where do the 2 Heads of the Biceps Brachii unite?

Answer 17

In the Distal 1/3 of the Upper Arm

Question 18

Where does the Tendon of the Biceps Brachii attach Distally?

Answer 18

1. Radial Tuberosity

2. Fascia of the Forearm (Via the Bicipital Aponeurosis)

Question 19

What is the function of the Biceps Brachii?

Answer 19

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

Question 20

What is the innervation of the Biceps Brachii?

Answer 20

Musculocutaneous Nerve

Question 21

What is the Biceps Tendon Reflex testing?

Answer 21

C6

Question 22

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

Answer 22

Deep

Question 23

How is the Coracobrachialis described?

Answer 23

A Slender, Rounded Muscle

Question 24

Where does the Coracobrachialis originate from?

Answer 24

Coracoid Process of the Scapula

Question 25

Where does the Coracobrachialis travel?

Answer 25

Through the Axilla

Question 26

Where does the Coracobrachialis attach to distally?

Answer 26

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

Question 27

What is the function of the Coracobrachialis?

Answer 27

1. Flexion of the Arm at the Shoulder | 2. Weak Adduction of the Arm at the Shoulder

Question 28

What is the innervation of the Coracobrachialis?

Answer 28

Musculocutaneous Nerve

Question 29

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

Answer 29

Deep

Question 30

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

Answer 30

Distally

Question 31

How is the Brachialis described?

Answer 31

A Strong Muscle

Question 32

Where does the Brachialis originate from?

Answer 32

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

Question 33

Where does the Brachialis muscle attach distally?

Answer 33

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

Question 34

What is the function of the Brachialis?

Answer 34

Flexion of the Elbow

Question 35

What is the innervation of the Brachialis?

Answer 35

1. Musculocutaneous Nerve | 2. With Contribution from the Radial Nerve

Question 36

What does the Musculocutaneous Nerve arise from?

Answer 36

The Lateral Cord of the Brachial Plexus

Question 37

How does the Musculocutaneous Nerve enter into the Arm?

Answer 37

By Perforating the Coracobrachialis

Question 38

Where does the Musculocutaneous Nerve travel?

Answer 38

It descends between the Biceps Brachii and Brachialis Muscles

Question 39

What does the Musculocutaneous Nerve continue as?

Answer 39

Lateral Cutaneous Nerve of the Forearm

Question 40

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

Answer 40

1. C5 2. C6 3. C7

Question 41

What are the Muscles Supplied by the Musculocutaneous Nerve?

Answer 41

1. Biceps Brachii 2. Coracobrachialis 3. Brachialis

Question 42

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

Answer 42

The Lateral Part of the Forearm

Question 43

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

Answer 43

No