The brachial plexus is an arrangement of nerve fibers, formed by the anterior rami of the lower cervical and upper thoracic nerve roots, specifically from above the fifth cervical vertebra to the first thoracic vertebra (C5-T1). From the spinal cord it proceeds through the neck, the axilla (armpit) and into the arm. The brachial plexus lies between the neck and the axilla with the distal portion lying behind the clavicle and the pectoral muscles. It supplies the skin and muscles of the shoulder and the upper limb.
The sequence of arrangement of Brachial Plexus is Roots, Trunks, Divisions, Cords and Divisions.
Brachial Nerves replace Brachial Plexus
To o provide anaesthesia/analgesia of the upper limb using local anaesthetics, one has to block these nerves.
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