pisohamate ligament pisohamate ligament the pisohamate ligament is a ligament in the hand. it connects the pisiform to the hook of the hamate. it is a prolongation of the tendon of the flexor carpi ulnaris. pisohamate ligamentligaments of wrist. anterior view. (pisohamate ligament labeled at center right.)detailsfrompisiformtohamateidentifierslatinligamentum pisohamatumta98a03.5.11.108ta21825fma42304anatomical terminology it serves as part of the origin for the abductor digiti minimi. it also forms the floor of the ulnar canal, a canal that allows the ulnar nerve and ulnar artery into the hand.