A canal syndrome induces clinical manifestations secondary to the entrapment of a peripheral nerve passing through an inextensible anatomical structure. The injured nerve induces stereotyped or atypical semiology requiring frequently a neurophysiological examination. The most frequently encountered entrapment neuropathies of the upper and lower extremities are reviewed and the treatment discussed, based on immobilization, prescription of oral prednisone, local steroid injection or surgical decompression.