Fig. 3From: Imaging in the diagnosis of ulnar nerve pathologies—a neoteric approacha Probe position for localisation of the ulnar nerve at the wrist. b The nerve (arrowhead) is localised in the short axis in the Guyon’s canal between the pisiform and hook of hamate, lying adjacent to the ulnar artery (colour Doppler signal). c MR image showing the normal ulnar nerve (yellow arrow) in the Guyon’s canal: pisiform (P) and the hook of hamate (H) form the radial and ulnar boundaries. The roof is formed by the volar carpal ligament (red arrow) while the hypothenar muscles and transverse carpal ligament (red arrowhead) form the floorBack to article page