92 



MUSCLES OF THE HIP AND THIGH. 



Fig. 73. 



Quadratusfemoris.^^ — Origin. From the tuberosity of the ischium. 

 hisertion. Into the femur between the two trochanters. 



Obturator externus. — Origin. From the anterior margin of the 

 thyroid foramen, and ligament. Insertion. Into the digital fossa at 

 the root of the trochanter major. Use. The last four rotate the 

 thigh outwards. 



Biceps fiezor cruris.^^ — Origin. By a long head in common with 

 the semi-tendinosus from the tuberosity of the ischium, and by a 

 short fleshy one from the lower part of the linea aspera. Insertion. 

 Into the head of the tibia. 



Semi-tendinosus.^^ — Origin. From the tuberosity of the ischium. 

 Insertion. Into the side of the tibia just below its tubercle. 



Semi-membranosus. — Origin. From the external part of the 

 tuberosity of the ischium. Insertion. Into the inner side of the head 

 of the tibia and into the external condyle of the femur. 



Tensor vagincefemoris.* — (Fig. 73.) Origin. From the anterior 

 superior spinous process of the ilium. Insertion. 

 Into the fascia or sheath of the thigh. 



Sartorius.^ — Origin. From the anterior 

 superior spinous process of the ilium. Inser- 

 lion. Into the inner side of the head of the tibia. 

 JJse. It bends the leg and draws it inwards. 

 It is the longest muscle of the body. 



Rectus fe7noris.^ — Origin. From the anterior 

 inferior spinous process of the ilium. Inser- 

 tion!. Into the upper surface of the patella. 



Vastus externus.'^- — Origin. From the linea 

 aspera, and trochanter major. Insertion. Into 

 the upper and external part of the patella. 



Vastus internus.^ — Origin. From the linea 

 aspera in its whole length, covering the inside of 

 the thigh. Insertion. Into the common tendon 

 of the patella. 



CrurcBus. — Origin. From the anterior part 

 of the femur as well as from the linea aspera. 

 Insertion. Into the patella. 



These four last muscles form a common ten- 

 don in which is placed the patella, before it is 

 inserted into the tubercle of the tibia. They 

 are often called the quadriceps Jhnoris, and 

 extend the leg. 



Gracilis.^^ — Origin. From the body and 

 ramus of the pubes. Insertion. Into the inside 

 of the head of the tibia. 



Pectifieus.'^^ — Origin. From the crest of the 

 pubis, and the triangular face in front of it. 

 Insertion. Into the linea aspera below the trochanter minor. 



