Anterior Compartment Of Arm

Question 1

What are the boundaries of the cubital fossa?

Answer 1

Base: Lateral border of the brachioradialis muscle, Medial border of the pronator teres muscle, Imaginary horizontal line joining the front of two epicondyles of the humerus

The apex is the meeting point of the lateral and medial boundaries.

Question 2

What muscles form the floor of the cubital fossa?

Answer 2

Brachialis (upper part) and Supinator (lower part)

The floor is formed by these muscles.

Question 3

What is contained within the superficial fascia of the cubital fossa?

Answer 3

Median cubital vein, Medial and lateral cutaneous nerves of the forearm

The superficial fascia provides a connection among veins and nerves.

Question 4

Which vein is the most preferred for venepuncture in the cubital fossa?

Answer 4

Median cubital vein

It is the vein of choice due to its location and accessibility.

Question 5

List the contents of the cubital fossa from medial to lateral side.

Answer 5

1. Median nerve
2. Brachial artery
3. Biceps tendon
4. Radial nerve

Mnemonic: MBBS (M = Median nerve, B = Brachial artery, B = Biceps tendon, S = Superficial radial nerve).

Question 6

What clinical significance does the cubital fossa hold?

Answer 6

It is important for venepuncture due to the presence of major superficial veins

The most common site for venepuncture is the cubital fossa.

Question 7

True or False: The brachial artery terminates in the cubital fossa.

Answer 7

True

It divides into the radial and ulnar arteries at the level of the neck of the radius.

Question 8

Fill in the blank: The _______ passes backward and laterally to attach on the radial tuberosity.

Answer 8

Biceps tendon

Question 9

What happens to the radial nerve at the level of the lateral epicondyle?

Answer 9

It divides into terminal branches: superficial radial nerve and deep radial nerve/posterior interosseous nerve

The deep radial nerve disappears in the substance of the supinator muscle.

Question 10

What is the function of the bicipital aponeurosis during venepuncture?

Answer 10

It acts as a hard platform, protecting the underlying median nerve and brachial artery from injury

This structure helps minimize pain during venepuncture.

Question 11

What is the significance of the median cubital vein’s position?

Answer 11

It lies more superficially and is not accompanied by a nerve, making venepuncture less painful

The skin over it is less sensitive.