| OCR Text |
Show i 424 MR. A. SANDERS ON THE [June 9, biceps femoris, and is inserted into the dorsal surface of the femur dorsad of the crureus, on a line corresponding to the insertion of the last muscle; in its course it is situated in close juxtaposition to the capsular ligament of the hip-joint. Vastus and crureus.-The externus arises in intimate fusion with the crureus; it commences narrow immediately behind the head of the femur, between the insertions of the adductor magnus and the gluteus medius, and covers the outer and upper surface of the bone. The internus is smaller, and arises from about half the ventral surface of the femur. They are inserted with the rectus into the patella. Extensor tarsi arises from the middle half of the tibia, being superficial to all the other muscles of the flexor side of the leg; it crosses the limb obliquely, and is inserted into the base of the metatarsal bone of the fifth digit, aud fascia covering the tarsus. Flexor perforatus arises narrow from the fibular condyle of the humerus, and, forming a broad muscular mass in the leg, it is inserted partly tendinous and partly muscular into an apophysis of the cuboid bone of the tarsus, and is continued into the plantar surface of the foot by means of five muscular fasciculi, which are inserted into the metatarsal bones by two heads, between which the long flexor-tendons pass; the one belonging to the fourth digit is also inserted into the base of the first phalanx; that of the fifth has in addition an attachment along the whole length of its metatarsal bone. Flexor longus digitorum arises from the peroneal condyle of the humerus in conjunction with the last, aud also from the interarticular cartilage of the knee-joint, also from the proximal half of tbe fibula ; it is inserted into three-fourths of the length of the tibia, which part, perhaps, represents the popliteus. Continuing down the leg it developes a broad tendon, occupying the plantar surface of foot, dorsad of the last; here it divides into four long tendons, which are inserted into the terminal phalanx of the pollex and of the second, third, and fourth digits; the long tendon belonging to the fifth digit is given off from the muscle about the middle of the leg, aud, passing round the projecting apophysis of the cuboid, goes to the terminal phalanx of that digit. Flexor accessorius digitorum.-There are four muscular slips which may be collectively called by this name. The one belonging to the fourth digit arises from the tendon of the long flexor going to that digit, and gives off a tendon of its own inserted into the base of its third phalanx; the slip belonging to the third digit arises from the cuboid bone; those of the second and hallux from the cuneiform (these join the long tendon) ; those of the second and third digits have in addition slender tendons, which are inserted into the second phalanges of those digits. Lumbricales.-There are five-one on the peroneal side of the second digit, one on each side of the third digit, one on each side of the fourth digit. Adductores digitorum form the third layer in the sole of the foot. They consist of four muscular slips arising from the cuboid; three cross the plantar surface and are inserted into the peroneal side of |
