CARPAL TUNNEL, DRAWING. Transversal section of the wrist. The bones of the carpus present at this level of the section are represented : scaphoid bone, capitate bone or capitatum, hooked bone or hamatum, pyramidal bone or triquetrum, pisiform bone. Dorsally, the tendons of the extensor muscles of the fingers in dark blue are present inside a sheath, except the extensor tendon of the thumb which is apart. The carpal tunnel is located at the level of the palm , it is delimited by the annular ligam