Editing Peripheral nervous system (section)

====Brachial plexus (C5–T1)====
{{Further|Brachial plexus}}
The last four cervical spinal nerves, C5 through C8, and the first thoracic spinal nerve, T1, combine to form the [[brachial plexus]], or [[plexus brachialis]], a tangled array of nerves, splitting, combining and recombining, to form the nerves that subserve the upper-limb and upper back. Although the brachial plexus may appear tangled, it is highly organized and predictable, with little variation between people. See [[brachial plexus injuries]].