<prompt> The term Guyon;s canal is in relation to which of the following?Anterior interosseus nerveUlnar nerveMedian nerveRadial aery  <response>: Guyons canal or ulnar tunnel is an osseofibrous tunnel formed by the pisohamate ligament bridging the concavity formed by the pisiform bone and hook of the hamate. The ulnar a nerve passes through this tunnel in the wrist and its compression here lead to ulnar tunnel syndrome characterised by hypoesthesia of medial 1 and 12 fingers and weakness of intrinsic muscles of the hand. Ref: Textbook of anatomy upper limb and thorax, Vishram Singh, 2nd edition, page no.150, 180 