Eight (8) pairs of neckforeroots leave the cervical spinal cord.
The nerve fibres of the roots C1 to C4 are part of the cervical braid (cervicalis plexus) giving rise to the skin and skeletal muscle nerves of the neck and the diaphragma;
The nerve fibers of the roots C5 to C8 are part of the brachial plexus which gives rise to the skin and skeletal muscle nerves of the shoulder and arm,