So ANATOMY AND PHYSIOLOGY FOR NURSES 



Vastus Interims and Crureus. Origin, from the inner 

 side of the femur. Insertion, into the patella. Action, 

 extends the leg. Nerve, anterior crural. 



Subcrureus. Arises by two heads from the femur. 

 Inserted in the upper portion of the synovial pouch of the 

 knee-joint. Action, draws the synovial sac upward. 

 Nerve, anterior crural. 



The muscles of the internal femoral region are : 

 Gracilis. Adductor longus. 



Pectineus. Adductor magnus. 



Adductor brevis. 



Gracilis. Origin, ramus of the os pubis. Inserted 

 into the inner side of the tibia. Action, flexes the leg, 

 rotates it inward, and adducts the thigh. Nerve, the 

 obturator. 



Pectineus. Origin, from the iliopectineal line. In- 

 serted into the lesser trochanter. Action, flexes and ad- 

 ducts the thigh. Nerves, anterior crural and obturator. 

 The adductor longus magnus and brevis arise from the 

 os pubis, and are inserted into the inner side of the femur. 

 Action, adduct, rotate, and flex the thigh. Nerve, obtu- 

 rator and sciatic. 



The gluteal region contains the largest muscles of 

 the body; these are as follows: 



Gluteus maximus. Obturator internus. 



Gluteus medius. Gemellus superior. 



Gluteus minimus. Gemellus inferior. 



Pyriformis. Obturator externus. 



Quadratus femoris. 



The gluteus maximus is the most superficial muscle in 

 this region. It is a broad, thick, fleshy muscle, quadri- 

 lateral in shape, and forms the nates; it is the most im- 

 portant muscle in maintaining the body in an erect pos- 

 ture. It arises from the ilium, sacrum, and coccyx, and is 

 inserted into the great trochanter. Action, holds the 



