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Show 794 MR. ST. GEORGE MIVART ON THE [JlUie 27, attached to the base of the back of the trochanter, immediately next to the insertion of the gluteus medius on the one hand and of the femoro-caudal on the other. Femoro-caudal (figs. 15 & 17, F. C.)*. This exceedingly large muscle arises from the infero-lateral aspect of the caudal vertebrae, where it separates from the vertebral column by its backward intrusion (fig. 5, F. Ci), the contiguous parts of the ventral, and infero-lateral series of caudal muscular cones. It is inserted, by a very large and strong tendon, into the base of the trochanter on its extensor aspect and above the insertion of the adductor. A little before its insertion this large tendon gives off, nearly at right angles, a long delicate one, which, passing down the thigh into the popliteal space (figs. 17 & 18 y), is inserted into the interarticular cartilage between the femur and the tibia, as Stannius has statedf. The tibialis anticus (figs. 13, 16 & 18, T.A.) arises from the front of the tibia, the part above the middle of the hone springing mainly from its peroneal aspect, and the part below the middle from its inner aspect. It ends in a single tendon, which is inserted into the tibial side of the distal end of the metatarsal of the hallux. Extensor longus digitorum. This muscle arises, by a strong tendon (figs. 13, 15 & 16, E. L.D.), from the anterior surface of the external condyle of the femur. It continues fleshy down to the metatarsals, when it suddenly narrows and gives off two small tendons, which pass, one on each side of the middle metatarsal bone, near its proximal end. Of these two tendons, the peroneal one curves round tibiad, and is inserted into nearly the middle of the plantar surface of the third metatarsal. The other one is similarly implanted into the second metatarsal. Extensor brevis digitorum. This muscle may be said to consist of five portions:- • (1) The first part (figs. 15 & 16, E. B. 1) is an oblique slip, proceeding forwards and inwards, which arises from the peroneal aspect of the lower end of the fibula, and is inserted into the dorsum of the hallux. (2) The second part (figs. 15 & 16, E. B. 2) is similar in size and direction. It arises from the fibula, below the last, and is similarly inserted into the index digit. (3) The third portion (figs. 15 & 16, E. B. 3) arises, by a strong though small tendon, from a pit in the middle of the anterior surface of the astragalus. Passing between the two tendons of the extensor longus digitorum, it is inserted into the dorsum of the third digit. (4) The fourth part (figs. 15 & 16, E. B. 4) arises in common with the preceding, but does not pass between the tendons of the extensor longus digitorum. It is inserted into the dorsum of the fourth digit. (5) The fifth and last part arises, by a strong tendon, from the bottom of the anterior face of the astragalus (figs. 15 & 16, E. B. 5). It is also inserted into the dorsum of the fourth digit. * This is the " sous-caudien profond " of Meckel (loc. cit. p. 285). t Loc. cit. p. 133. no. 3. |
