. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 728 SOLIPEDA. tata, these six muscles exist and are disposed pretty nearly as in tlie human race ; but in the Pachydermata and Ruminantia there is but one flexor carpi raclialis. In all the above multidigitate animals, the muscles derived from the external condyle, and its vicinity by their co-operation, approximate the back of the hand towards the forearm, or, in other words, are extensors of the fore-foot ; while those derived from the internal conclyle have a contrary effect, and act as flexors of the hand. Should the
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 728 SOLIPEDA. tata, these six muscles exist and are disposed pretty nearly as in tlie human race ; but in the Pachydermata and Ruminantia there is but one flexor carpi raclialis. In all the above multidigitate animals, the muscles derived from the external condyle, and its vicinity by their co-operation, approximate the back of the hand towards the forearm, or, in other words, are extensors of the fore-foot ; while those derived from the internal conclyle have a contrary effect, and act as flexors of the hand. Should the flexor and extensor of the same side of the limb act together, the hand will be bent laterally in the corresponding direction. In the Solipeda, where the movements of the wrist are strictly limited to those of flexion and extension, the disposition of these muscles is considerably modified. The extensor carpi radialis is here single, arising from the anterior part of the external condyle of the humerus, and from the ex- ternal surface of that bone for a consider- able distance: it forms a strong fleshy belly, terminating in a powerful tendon, which runs to be inserted into the base of the anterior surface of the metacarpal or cannon bone. Tin's muscle, called by Bourgelat the " extcn- sejtr droif anterieitr da canon," seems, from the extent of its origin, to represent the long su- pinator and the two radial extensors of the wrist combined, and all three made to co- operate in the extension of the wrist. The flexor carpi radialis {epitrochlo-meti- carpien) arises from the external condyle of the humerus, and is inserted into the posterior surface of the base of the cannon bone, form- ing the antagonist to the preceding muscle : this is the "flechisseur interne du canon" of Bourgelat. The flexor carpi ii/nnris (epitrocltlo-crirpieii) arises from the posterior part of the external protuberance of the os humeri, and also by a distinct head from the protuberanc
Size: 1182px × 2115px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, booksubjectanatomy, booksubjectphysiology, booksubjectzoology
