The brachial plexus passes from the neck to the axilla and supplies the upper limb. It is formed from the ventral rami of the 5th to 8th cervical nerves and the ascending part of the ventral ramus of the 1st thoracic nerve.

How brachial plexus is formed?

The brachial plexus is formed by the anterior primary rami of C5 through T1 and provides sensory and motor innervation of the upper extremity. The brachial plexus is divided, proximally to distally into rami/roots, trunks, divisions, cords, and terminal branches.

What gives rise to the brachial plexus?

Ventral rami of the C5 through T1 spinal nerves constitute the roots of the brachial plexus. They come together to give rise to three trunks: superior (C5-C6), middle (C7), and inferior (C8-T1). ... These nerves innervate the anterior muscles of the upper arm, forearm, and intrinsic muscles.