describe the brachial plexus. (module 12.9a) the brachial plexus is a network of nerves formed by branches of spinal nerve segments c1-c7. the brachial plexus is a network of nerves formed by branches of spinal nerve segments s5-co1. the brachial plexus is a network of nerves formed by branches of spinal nerve segments t1-t12. the brachial plexus is a network of nerves formed by branches of spinal nerve segments l1-l5. the brachial plexus is a network of nerves formed by branches of spinal nerve segments c5-t1.
