Cubital Fossa

Question 1

Site:

Answer 1

It is an inter muscular space infront of the elbow

Question 2

Shape:

Answer 2

Triangular in shape; base is above, apex below

Question 3

Boundaries:

Answer 3

1. Base - an imaginary line between the 2 humeral epicondyles
2. Medial border - Pronator teres muscle
3. Lateral border - Brachioradialis muscle
4. Apex - meeting of the medial and lateral borders (brachioradialis overlapping pronator teres)

Question 4

Floor:

Answer 4

1. Brachialis (above and medially)
2. Supinator (below and laterally)

Question 5

Roof:

Answer 5

1. Skin
2. Superficial fascia containing:
   a. Basilic vein with ant. branch of med. cut. nerve of
   forearm (medially)
   b. Cephalic vein with ant. branch of lat. cut. nerve of
   forearm (laterally)
   c. Median cubital vein connecting basilica and
   cephalic veins
3. Deep fascia reinforced by the bicipital aponeurosis

Question 6

Contents, from medial to lateral:

Answer 6

1. Median nerve - leaves fossa by passing between the two heads of pronator teres
2. Terminal part of brachial artery and the beginning of both radial and ulnar arteries:
   a. Radial artery leaves fossa by passing deep to apex
   b.Ulnar artery leaves fossa by passing deep to pronator teres m
3. Biceps tendon - passes backwards to reach its insertion in the radial tuberosity
4. Radial nerve and its posterior interosseous branch:
   a. The radial nerve leaves the fossa by passing deep to the brachioradialis m
   b. The posterior interosseous nerve leaves the fossa by piercing the supinator m