The<unk>  is a part of the brachial plexus. It consists of contributions from all of the roots of the brachial plexus. The<unk>  gives rise to the following nerves: Name Roots Supplies upper subscapular nerve C5-C6 subscapularis muscle of the rotator cuff lower subscapular nerve C5-C6 subscapularis muscle, teres major muscle thoracodorsal nerve C6-C8 latissimus dorsi muscle axillary nerve C5-C6 sensation to the shoulder and motor to the deltoid muscle, the teres minor and the triceps brachii (long head) muscle radial nerve C5-C8, T1 triceps brachii muscle, the brachioradialis muscle, the extensor muscles of the fingers and wrist (extensor carpi radialis muscle), supinator, and the extensor and abductor muscles of the thumb
Posterior cord
Medial cord
Nuchal cord
Anterior median fissure of spinal cord
Midbrain tegmentum
Fourth ventricle
Rhomboid fossa
Forebrain