 MRI ( axial view ) of the upper extremity illustrating structures within the MBFC. BAV, brachial artery and veins; BB, biceps brachii; BV, basilica vein; H, humerus; MN, median nerve; MBFC, medial brachial fascial compartment; MRI, magnetic resonance imaging; TB, triceps brachii; UN, ulnar nerve. 