The<unk>  is a plexus of the ventral rami of the first four<unk>  spinal nerves which are located from C1 to C4<unk>  segment in the neck.  They are located laterally to the transverse processes between prevertebral muscles from the medial side and vertebral (m.scalenus, m.levator scapulae, m.splenius cervicis) from lateral side.  Here there is anastomosis with accessory nerve, hypoglossal nerve and sympathetic trunk.
It is located in the neck, deep to sternocleidomastoid. Nerves formed from the<unk>  innervate the back of the head, as well as some neck muscles.  The branches of the<unk>  emerge from the posterior triangle at the nerve point, a point which lies midway on the posterior border of the Sternocleidomastoid.
Cervical plexus
Lumbar plexus
Brachial plexus
Sacral plexus
Lumbar nerves
Pampiniform plexus
Plexus
Trigeminal nerve