Entrapment Neuropathies in the Upper and Lower Limbs: Anatomy and MRI Features
Figure 10
Drawings of the carpal tunnel and Guyon’s canal at the levels of pisiform (a) and hamate (b). The median nerve (open arrows) passes through the carpal tunnel under the flexor retinaculum lying superficial to the flexor digitorum superficialis tendons. Guyon’s canal contains the ulnar nerve (arrows) and ulnar artery with the floor formed by the flexor retinaculum. The ulnar nerve divides into the superficial sensory and deep motor branches at the level of the hamate. P: pisiform, S: scaphoid, T: trapezium, H: hamate.
