. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. ARTICULATIONS OF THE VOSTERIOR LIMBS. 213 lateral, and permits its circumference to be divided into four boi'ders : a superior, attached to the rugged lateral ridge of the sacrum ; an inferior, fixed to the supra- cotyloid ridge, as well as the ischial tuberosity, and forming by the portion comprised between these two insertions, with the small ischiatic notch, the opening by which the internal obturator and pyramidalis muscles leave the pelvis ; an anterior, imperfectly limited, along with the great sciatic not
. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. ARTICULATIONS OF THE VOSTERIOR LIMBS. 213 lateral, and permits its circumference to be divided into four boi'ders : a superior, attached to the rugged lateral ridge of the sacrum ; an inferior, fixed to the supra- cotyloid ridge, as well as the ischial tuberosity, and forming by the portion comprised between these two insertions, with the small ischiatic notch, the opening by which the internal obturator and pyramidalis muscles leave the pelvis ; an anterior, imperfectly limited, along with the great sciatic notch, circumscribes tlie opening through wlii<'h the gluteal vessels and nerves, and the sciatic nerves pass ; a posterior, doubled in the form of two layers which embrace the semi- membranosus muscle, and is confounded superiorly with the aponeurosis envelop- ing the coccygeal muscles. The external face of this ligament is traversed by the sciatic nerves, and Ls covered by the long vastus and the semitendinosus muscles, which derive numerous insertions from it. Its internal face is covered, in front,. SACRO-ILIAC AND COXO-FKMORAL ARTICULATIONS, WITH THEIR STJRROUNDIHG MUSCLES. 11, Sacro-sciatic ligament; 12, great sciatic notch; 13, superior ilio-sitcral ligament; 14, inferior ilio-sacral ligament. by the peritoneum, and, posteriorly, is in contact with the ischio-coccygeal and ischio-anal muscles, to which it gives attachment. Synovial mpmbrane.—This lines the sacro-iliac ligament, but only furnishes a small quantity of synovia. MovemenU.—The two sacro-iliac articulations, being the centres towards which all the propulsive efforts communicated to the trunk by the posterior limbs con- verge, do not offer much mobility, as that would opjiose the integral trans- mission of the propulsion. So that they permit only a very restricted gliding of the articular surfaces ; while the union of the sacnim and coxa by diarthrosis, appears to be exclusively designed to prevent the frac
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Keywords: ., bookauthorcha, bookcentury1900, bookdecade1900, booksubjecthorses
