| OCR Text |
Show 550 MESSRS. BEDDARD AND MITCHELL ON THE [June 19, from the gluteus to the biceps sling. It is fused with the crureus in front and terminates in the patellar ligament. Crureus.-This is tendinous on the outer surface at its origin from the neck of the femur; it also arises from a considerable part of the shaft of the femur and is inserted with the vastus. Vastus internus.-This arises from the whole length of the inner surface of the shaft of the femur, starting from immediately below the insertion of the pectineus. It is inserted on to the tibia alongside the tibial insertion of the sartorius. Biceps.-This arises fleshy from the whole of the postaeetabular ridge of the ileum to the anterior edge of the semitendinosus. It ends in a tendon which passes through a sling and is inserted on to the fibula. Femoro-caudal.-This was a large thin tendon at each end. No accessory is present. Semitendinosus.-This arises entirely from the ileum behind the biceps ; it is half an inch broad, and after being joined by the somewhat small accessory, it sends a flat tendinous slip to the tendou of the membranosus. The rest of the tendon joins the middle head of the gastrocnemius, with which the accessory semitendinosus is fused all along its length. Semimembranosus.-The origin of this is fleshy from the pubis and ischium. It passes into a flat tendon half an inch broad, which after receiving the slip from the tendinosus, runs in to be inserted on to the tibia between the inner and middle heads of the gastrocnemius. Obturator externus.-This arises from the postaeetabular part of the ileum, and is inserted exactly opposite the minimus. Obturator internus.-This has an elongated oval origin and its insertion is tendinous to the outer surface of the head of the femur. Gemellus.-This is single and entirely fleshy, surrounding the tendon of the foregoing muscle. Adductors.-The outer muscle is much the shorter and narrower of the two ; its fibres are coarse and run from the tendinous origin on the ischium to the posterior face of the femur, and a few fibres are continued to the gastrocnemius. The deeper adductor is longer and broader, and its fibres are more delicate. They arise along the whole length of the ischium, reaching under the semimembranosus behind. The posterior edge of the muscle is doubled upon itself, the insertion is double. One set of fibres run to the femur under the other adductor, the other set join the middle head of the gastrocnemius. Ambiens.-This muscle is w^eU marked ; it arises as described above by a tendon under the pectineus • the belly of the muscle ends above the knee-joint in a flat narrow tendon, which runs through the capsule of the joint to the front of the leg, and then passing under the origin of the perforated and perforating flexors, joins the perforated flexors in a manner presently to be described. The ambiens is innervated by a twig which comes off the crural plexus with the nerve for the sartorius. |
