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Rectus Femoris
Origin:Anterior inferior iliac spine
Insertion:Tibial Tuberosity
Action:Flex hip; extend knee
Vastus Lateralis
Origin:Greater trochanter and linea aspera
Insertion: Tibial tuberosity
Action: Extend knee
Vastus Medialis
Origin: Linea aspera
Insertion:Tibial Tuberosity
Action:Extend knee
Vastus Intermedius
Origin: Anterior and Lateral diaphysis if femur
Insertion:Tibial tuberosity
Action: Extend knee
Sartorius
Action: Flex, laterally rotate hip; flex knee
Gracilis
Action: Flex, adduct hip; flex knee
Pectineus
Action:Flex, adducts hip ( towards body midline)
Adductor Longus
Origin: Anterior body of pubis
Insertion: Linea aspera
Action:Adduct hip
Adductor Brevis
Origin: Inferior pubic ramus
Insertion: Linea aspera
Action:Adduct hip
Adduct Magnus
Origin: Inferior pubic ramus, ischial ramus, and ischial tuberosity
Insertion: Linea aspera(roughened ridge on the posterior (back) surface of the femur)
Action:Adduct, flex hip
Gluteus Maximus
Action:Extend, laterally rotates hip
Gluteus Medius
Action: Abduct hip(move away from body midline )
Biceps Femoris (2 heads)
Origin: Long head- ischial tuberosity; Short head- linea aspera. Insertion: head of fibula
Action:Long head- extend hip; flex hip
Semitendinosus
Origin:Ischial tuberosity
Insertion:Proximal medial diaphysis of tibia
Action:Extend hip; flex knee
Semimembranosus
Origin: Ischial Tuberosity
Insertion: Medil condyle of tibia
Action:Extend hip; flex knee