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Muscles Acting on the Knee and Leg
N/A
30
Biology
Undergraduate 1
11/11/2013

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Term
Rectus femoris - Origin
Definition
Anterior inferior iliac spine of ilium; Superior margin of acetabulum
Term
Rectus femoris - Insertion
Definition
Tibial tuberosity of tibia, via patellar tendon
Term
Rectus femoris - Action
Definition
Extend knee; Flex hip
Term
Vastus lateralis - Origin
Definition
Greater trochanter, intertrochanteric line, gluteal tuberosity, linea aspera of femur
Term
Vastus lateralis - Insertion
Definition
Lateral condyle and tibial tuberosity of tibia, via patellar tendon
Term
Vastus lateralis - Action
Definition
Extend knee; Stabilize patella
Term
Vastus medialis - Origin
Definition
Intertrochanteric line, pectineal line, linea aspera, medial supracondylar line of femur
Term
Vastus medialis - Insertion
Definition
Medial condyle and tibial tuberosity of tibia, via patellar tendon
Term
Vastus medialis - Action
Definition
Extend knee; Stabilize patella
Term
Vastus intermedius - Origin
Definition
Lateral anterior shaft of femur
Term
Vastus intermedius - Insertion
Definition
Tibial tuberosity of tibia, via patellar tendon
Term
Vastus intermedius - Action
Definition
Extend knee
Term
Sartorius - Origin
Definition
Anterior superior iliac spine of ilium
Term
Sartorius - Insertion
Definition
Medial proximal shaft of tibia
Term
Sartorius - Action
Definition
Flex knee; Flex, abduct, laterally rotate hip
Term
Biceps femoris (long head) - Origin
Definition
Ischial tuberosity of ischium
Term
Biceps femoris (long head) - Insertion
Definition
Head of fibula
Term
Biceps femoris (long head) - Action
Definition
Flex, laterally rotate knee; Extend, laterally rotate hip
Term
Biceps femoris (short head) - Origin
Definition
Linea aspera, lateral supracondylar line of femur
Term
Biceps femoris (short head) - Insertion
Definition
Head of fibula
Term
Biceps femoris (short head) - Action
Definition
Flex, laterally rotate knee; Extend, laterally rotate hip
Term
Semitendinosus - Origin
Definition
Ischial tuberosity of ischium
Term
Semitendinosus - Insertion
Definition
Proximal medial shaft of tibia
Term
Semitendinosus - Action
Definition
Flex, medially rotate knee; Medially rotate hip
Term
Semimembranosus - Origin
Definition
Ischial tuberosity of ischium
Term
Semimembranosus - Insertion
Definition
Medial condyle of tibia; Lateral condyle of femur
Term
Semimembranosus - Action
Definition
Flex, medially rotate knee; Medially rotate hip
Term
Popliteus - Origin
Definition
Lateral condyle of femur
Term
Popliteus - Insertion
Definition
Proximal posterior tibia
Term
Popliteus - Action
Definition
Medially rotate knee
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