| OCR Text |
Show 704 MR. T. M A N N E R S - S M I T H O N T H E [Dec. 4, placed deeply between superior and inferior portions of medius; at its insertion it is blended with medius. It arises from dorsum ilii just behind the superior part of medius. It is a very narrow muscle. It may represent minimus. There is a muscle arising from the lateral processes of the caudal vertebrae, and inserted into the upper part of the femur. A muscle is described by Mivart in Echidna, in this position, which he states he is disposed to regard as the pyriformis. Meckel says pyriformis is present and fairly large. Owen does not mention it. This is apparently the muscle described by Coues as quadratus femoris. Its origin and insertion would approximate it more to pyriformis than the muscle described by Coues under that name. MUSCLES OF FRONT OF THIGH. Sartorius.-Is a long muscle. It arises from the pectineal spine of the pubes and is inserted into the head of tibia. Bectus femoris.-Arises from the cotyloid border of ilium and is inserted into the patella. It is supplied by a branch of the anterior crural, which arises within the abdomen below the nerve which supplies the anterior part of the gluteus medius. This muscle is quite distinct from the rest of the quadriceps. The remainder of tbe extensor mass can be separated where the nerve enters into two portions, inner and outer vastus; the two vasti arise from the superior surface of the shaft of the femur, the outer vastus extending as high as greater tuberosity. They are inserted into patella and are supplied by the anterior crural nerve. Psoas magnus and Iliacus have the usual position, relations, and attachments. Their insertion into femur extends as far as a little below the middle. They are supplied by the obturator nerve. Adductor Group. Gracilis.-This is a large muscle concealing the other adductors. It arises from the marsupial bone and from the inferior surface of the pubes. It is inserted into the inner side of tibia. The muscle sends a slip to sphincter ani. It is supplied by the obturator nerve. It has much the same origin and insertion in Echidna (Mivart). The named adductors consist of well-marked and easily separable longus, brevis, and magnus. Meckel mentions two only. Adductor longus.-Arises from the pubes close to marsupial bone. It is inserted into the lower end of femur. It receives a distinct branch of the obturator nerve on its deep surface. This muscle is apparently absent in Echidna (Mivart). Adductor brevis.-This is a narrow muscle, arising by a flat tendon from the mesial portion of the inferior surface of the pubes; it is inserted into the lower end of the femur. In position it is situated |
