I don't know how much detail of the Brachial Plexus you have been taught, but I will give a general idea and then let me know if there is anything specific about it you would like to know.
Plexus is a network of nerves that extend from the Cervical spine cord (both sides) through a canal in the neck running over the first rib and towards the upper arm. It provides nerve fibers to the chest, shoulder, arm, forearm, and hand for both sensation and muscle movement.
Please let me know if you need help with specifics because I am happy to answer them here.
Inactive Tutor
Motor and sensory are definitely carried to the upper limb and thorax by branches of the branchial plexus! Can anyone describe the autonomic functions carried by the brachial plexus and its terminal branches? Great discussion!07/25/20