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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
- Biceps Brachii
Supplied by the
MUSCULOCUTANEOUS
- Brachialis
- Coracobrachialis NERVE
- Median nerve
- Musculocutaneous nerve
The medial cutaneous nerve of forearm is not inside
-
the fascial sheath, but is still important enough to warrant a
brief mention.
The Basilic vein and the Cephalic vein are
usually superficial to the fascial planes
.
Cephalic vein
- Triceps Brachii
- Anconeus
- Radial nerve
Supplied by the
RADIAL NERVE
-
Deep artery of the arm (profunda brachii)
-
Superior ulnar collateral artery
-
Ulnar nerve as depicted here is in the posterior
(A branch of the brachial artery)
compartment; it travels anteriorly to the medial intermuscular
septum, until it pierces it about half-way down the humerus,
together with the superior ulnar collateral artery
Radial nerve
Lateral intermuscular septum
Biceps brachii
Lateral
intermuscular
septum
Posterior Compartment: EXTENSORS
Deep artery of the arm
Musculocutaneous nerve
Ulnar nerve
Median nerve
Triceps brachii
Brachialis
Medial
intermuscular
septum
Deltoid:
Not actually a part of the anterior
compartment, as it has its own
fascial compartment.
Basilic vein
Brachial artery
Coracobrachialis
Medial cutaneous
nerve of forearm
Medial intermuscular septum
Superior ulnar collateral artery