2. Arm
• The arm (upper arm; brachium) is the proximal segment of the upper
limb from the shoulder to the elbow.
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6. Arm
• The arm is enclosed in a sheath of deep fascia .
• Two fascial intermuscular septa, one on the medial side and
one on the lateral side, extend inward from this sheath and are
attached to the medial and lateral supracondylar ridges of the
humerus, respectively.
• In this way, the upper arm is divided into an anterior and a posterior
osseofascial compartment, each having a set of muscles, nerves, and
arteries .
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15. • The musculocutaneous nerve, median nerve, ulnar nerve, brachial
artery, and basilic vein pass through this region. The radial nerve is
present in the lower part of the compartment.
Anterior Compartment
16. • The radial nerve, ulnar nerve, and profunda brachii vessels pass
through this region.
Posterior Compartment
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30. Elbow and Cubital Fossa
• The elbow is the area connecting the
arm with the forearm.
• The cubital fossa is a triangular
depression that lies in the anterior
aspect of the elbow.
• This fossa is important because it
conveys several major structures
between the arm and forearm.
31. Cubital Fossa Boundaries
Laterally: Brachioradialis muscle
Medially: Pronator teres muscle
Base: Imaginary line drawn between the two epicondyles of
the humerus forming the base of the triangle
Floor: Supinator muscle laterally; the brachialis muscle
medially
Roof: Skin and fascia, reinforced by the bicipital aponeurosis.
32. Cubital Fossa Contents
• The cubital fossa contains the following structures,
enumerated from the medial to the lateral side: the median
nerve, the bifurcation of the brachial artery into the ulnar
and radial arteries, the tendon of the biceps muscle, and the
radial nerve and its deep branch.
