MYOLOGY. 



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THIGH. TENSOR VAGESLE FEMORIS. 

 Origin. External angle of ilium. 



Insertion. Into the strong fascia covering and running be- 

 tween the muscles of the thigh, the fascia lata. 



Action. Flexes thigh and renders fascia lata tense. 

 Nerve. Anterior gluteal. 



CRURAL TRICEPS. 



(A) Rectus. 



Origin. Lip of cotyloid cavity. 

 Insertion. Into patella. 



(B) Vastus Externus. 



Origin. Outer and anterior surfaces of femur. 

 Insertion. As above. 



(C) Vastus Interims. 



Origin. Inner and anterior surfaces of femur. 

 Insertion. As above. 

 Action. Extensor of leg.. 

 Nerve. Posterior gluteal. 



ANTERIOR GRACILIS. 



Origin. From ilium near origin of rectus. 

 Insertion. Into capsular ligament of hip joint. 

 Action. Makes tense capsule of joint. 

 Nerve. Ilio-muscular. 



LONG VASTUS. 



(A) Anterior portion. 



Origin. Sacral spine, sacro-sciatic ligament, tuberosity of 

 ischium and coccygeal aponeurosis. 



Insertion. Below subtrochanteric crest of femur and side of 

 patella. 



Action. Pulls femur backward and patella outward. 



(B) Posterior portion. 



Origin. Spine and tuberosity of ischium. 

 Insertion. Crest of tibia and tibial fascia. 

 Action. Flexes leg and makes tense fascia, 

 Nerve. Great sciatic. 



