6 – Anatomy: Cutaneous branches of the radial nerve

The cutaneous branches of the radial nerve are:

The posterior brachial cutaneous nerve innervates the posterior aspect of the arm down to the olecranon

The inferior lateral brachial cutaneous nerve innervates the inferior lateral part of the arm at the level of the elbow

The posterior antebrachial cutaneous nerve innervates the posterior part of the forearm

The superficial branch of the radial nerve runs in the forearm deep to the brachioradial muscle and lateral to the radial artery

Approx. 6 cm proximal to the wrist it pierces the deep fascia and bifurcates in a medial and a lateral branch that innervate the dorsal part of the 2 1/2 radial digits