| OCR Text |
Show I 1 MR. E. J. S1DEBOTHAM ON THE [Jan- 20' iliac synchondrosis. It is inserted by a narrow tendon into summit of great trochanter. „ Obturator externus.-Arises from margin of obturator foramen and membrane ; inserted by a flattened tendon into digital tossa with obturator internus. , Obturator internus.-Arises from descending ramus of pubes and a small portion of ascending ramus of ischium. Tendon plays over small sciatic notch and is inserted into digital fossa with obturator externus. Gemellus superior consists of two distinct parts. The first arises from ascending ramus of ischium in front of groove for tendon of obturator internus. The second portion lies behind this and is slightly overlapped by it. Both portions are inserted into tendon of obturator internus and into surface of bone just above it by tendinous fibres. Gemellus inferior.-Arises from ascending; ramus of ischium T 1 under cover of gemellus inferior and obturator internus. Inserted into digital fossa below tendon of obturator internus. Biceps.-Coarsely fasciculated ; arises from tuberosity of ischium ; inserted into fascia on outer side of leg for its upper third. Semitendinosus. - Arises from ischial tuberosity partly under cover of biceps and closely connected with it. An inch below its origin it receives caudal portion, which is ribbcn-shaped and arises from transverse processes of second and third caudal vertebrae. At the junction of the two portions there is a tendinous intersection, It is inserted into inner surface of tibia under cover of gracilis, its lower part being closely connected with the insertion of that muscle. Its most superficial fibres are inserted into fascia on outer side of leg just below insertion of biceps. Semimembranosus.-Arises from descending ramus of pubes and ascending ramus of ischium, extending between origins of gracilis and semitendinosus. It is inserted into inner side of head and adjacent part of tibia for two fifths of an inch. Sartorius.-Arises from anterior superior spine of ilium and by a linear origin for a quarter of an inch below. It is inserted by tendon into expansion of triceps covering patella. Triceps extensor.-Rectus femoris arises from dorsal part of acetabulum by a strong rounded tendon and by tendinous fibres above and below. Vastus externus and internus form a large fleshy mass arising from inner, anterior, and outer surfaces of femur. The former joins rectus for about a quarter of an inch and is inserted into front of knee, whilst vastus internus is inserted into fascia on inner side of knee. Subcrureus. - A flat band arising from front of lower part of shaft of femur at its inner part. Inserted into inner surface of common tendon. Psoas magnus.-A small thin muscle arising from last lumbar vertebra and anterior part of sacrum. It joins with iliacus at level of middle of sacrum, and is inserted by thin tendinous fibres into femur just below lesser trochanter. |
