Dictionary.net

Are two in number. 1. The Cubitalis anterior seu internus, Flexor carpi ulnaris, Ulnaris internus, Epitrochlo-cubito-carpien, Cubito-carpien- (Ch.), is a long muscle, situate at the anterior and inner part of the forearm. It arises from the inner condyle of the os humeri, at the inner side of the olecranon, and from the posterior edge of the ulna, and is inserted by a tendon into the os pisiforme. Its use is to bend the hand on the forearm, by directing it slight inwards. 2. The Cubitalis posterior seu externus, Extensor Carpi ulnaris, Ulnaris externus, Cubiteus externus, Cubito-su-metacarpien- (Ch.), is situate at the posterior part of the forearm. It arises from the external condyle of the os humeri, and is inserted into the superior extremity of the fifth bone of the metacarpus. Its use is to the extend the hand, inclining it a little inwards.