Anatomy of the Arm (Brachium)

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Which nerve supplies skin over the point of the shoulder to halfway down the deltoid muscle?

Axillary nerve

Intercostobrachial nerve

Supraclavicular nerve (correct)

Radial nerve

What is the main function of the intercostobrachial nerve?

Supplying the deltoid muscle

Supplying the skin of the medial side of the arm

Supplying the skin of the back of the arm

Supplying the thoracic wall (correct)

What is the name of the vein that ascends in the superficial fascia on the lateral side of the biceps?

Cephalic vein (correct)

Axillary vein

Brachial vein

Basilic vein

What is the purpose of the venae comitantes?

To accompany the large arteries Signup and view all the answers

Which compartment of the arm has its own blood and nerve supply?

Both anterior and posterior compartments Signup and view all the answers

What is the purpose of the intermuscular septa in the arm?

To divide the arm into compartments Signup and view all the answers

Where does the radial nerve lie in contact with?

The shaft of the humerus Signup and view all the answers

Which of the following muscles does the radial nerve not give a branch to?

Biceps Signup and view all the answers

Where does the radial nerve pierce?

The lateral fascial septum above the elbow Signup and view all the answers

Which cutaneous nerve is a branch of the radial nerve?

Lower lateral cutaneous nerve of the arm Signup and view all the answers

What is the radial nerve accompanied by in the spiral groove?

The profunda vessels Signup and view all the answers

In which compartment does the radial nerve give branches to the brachialis, brachioradialis, and extensor carpi radialis longus?

The anterior compartment of the arm Signup and view all the answers

What is the nerve supply to the triceps muscle?

Radial nerve Signup and view all the answers

What is the insertion of the triceps muscle?

The olecranon of the ulna Signup and view all the answers

Which artery accompanies the ulnar nerve at the middle of the arm?

Superior ulnar collateral artery Signup and view all the answers

What is the location of the radial nerve as it passes through the arm?

Spiral groove between medial and lateral heads of triceps Signup and view all the answers

What is the origin of the long head of the triceps muscle?

Infraglenoid tubercle of the scapula Signup and view all the answers

What is the structure that shifts from the anterior to the posterior compartments of the upper arm at the middle of the arm?

Ulnar nerve Signup and view all the answers

What is the effect of edema caused by soft tissue injury in the arm?

Compression of the blood vessels Signup and view all the answers

What is the nerve supply to the muscles in the anterior fascial compartment?

Musculocutaneous nerve Signup and view all the answers

What is the function of the biceps brachii muscle?

Flexion of the elbow joint and weak flexion of the shoulder joint Signup and view all the answers

What is the origin of the brachial artery?

Lower border of the teres major muscle Signup and view all the answers

What is the purpose of incising the deep fascia in compartment syndrome?

To decompress the affected compartment Signup and view all the answers

What are the two terminal branches of the brachial artery?

Radial and ulnar arteries Signup and view all the answers

What is the path of the musculocutaneous nerve?

Between the biceps and brachialis muscles to supply both Signup and view all the answers

What is the location of the radial nerve in the anterior fascial compartment?

In the lower part of the compartment Signup and view all the answers

What is the effect of delayed treatment of compartment syndrome?

Irreversible damage to the muscles Signup and view all the answers

What are the early signs of compartment syndrome?

Pain, pallor, parasthesia, pulselessness, and paralysis Signup and view all the answers