Innervation of the Upper Limb
Nerve fibres supply motor and sensory innervation to the upper limb.
It originates from nerve roots C5 to T1.
As it passes through the axilla, the nerve roots merges the nerve fibres from these roots into different nerve branches.
The brachial plexus is divided into 5 parts: roots, trunks, divisions, cords and branches.
It is known as the brachial plexus.
The plexus is divided into regions from proximal to distal that include trunks, divisions, cords, branches, and nerves.
It extends from the neck and courses distally through the axilla, providing motor and sensory innervation to the upper limb.
