Ultrasound normal radial nerve

This is an axial image of the normal radial nerve at the level of the antecubital fossa. In this image, the radial nerve is deep to the brachioradialis (B) and appears as two bright rounded fascicles. The fascicle to the right becomes the superficial radial sensory branch (S), and the fascicle to the left, the deep motor branch (M) of the radial nerve. They can be seen to separate in this real-time image as the probe is moved distally. To the lower left the bone shadow is that of the proximal radius and just above it, the supinator.