This document was created by Alex Yartsev ([email protected]); if I have used your data or images and forgot to reference you, please email me. Fascia and compartments of the proximal arm Section at a level just short of half-way along the humeris Brachial Fascia - Encloses the upper arm like a sleeve - Superiorly, it is continuous with the deltoid fascia, infraspinatus fascia and pectoralis fascia - Inferiorly, it is attached to the epicondyles of the humerus and the olecranon of ulna - It is continuous with the antebrachial fascia – the fascia of the forearm o It contains two SEPTA: the MEDIAL and LATERAL INTERMUSCULAR SEPTA. o The septa are attached to the supracondylar ridges and to the shaft of humerus o They separate the arm into the ANTERIOR COMPARTMENT and the POSTERIOR COMPARTMENT Anterior compartment Medial intermuscular septum Posterior compartment Lateral intermuscular septum Anterior Compartment: FLEXORS Posterior Compartment: EXTENSORS - Biceps Brachii - Triceps Brachii Supplied by the Supplied by the - Brachialis MUSCULOCUTANEOUS - Anconeus RADIAL NERVE NERVE - Radial nerve - Coracobrachialis - Deep artery of the arm (profunda brachii) - Median nerve - Musculocutaneous nerve (A branch of the brachial artery) - Superior ulnar collateral artery The medial cutaneous nerve of forearm is not inside the fascial sheath, but is still important enough to warrant a - Ulnar nerve as depicted here is in the posterior brief mention. compartment; it travels anteriorly to the medial intermuscular - The Basilic vein and the Cephalic vein are septum, until it pierces it about half-way down the humerus, together with the superior ulnar collateral artery usually superficial to the fascial planes . Radial nerve Cephalic vein Lateral intermuscular septum Biceps brachii Deep artery of the arm Lateral Musculocutaneous nerve intermuscular Ulnar nerve septum Median nerve Triceps brachii Brachialis Medial Basilic vein intermuscular septum Brachial artery Medial intermuscular septum Deltoid: Coracobrachialis Not actually a part of the anterior Superior ulnar collateral artery compartment, as it has its own Medial cutaneous fascial compartment. nerve of forearm .