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Muscles of the Thigh
Muscles that move the femur, tibia, and fibula
Question | Answer |
---|---|
Origin of the biceps femoris (long and short head) | Long head: Ishial tuberosity Short head: Lateral lip of linea aspera |
Insertion of the biceps femoris | Head of fibula |
Action of the biceps femoris | Flex and laterally rotate the flexed knee Extend and laterally rotate the hip; tilt pelvis back |
Nerve innervation of the biceps femoris | Tibial & Peroneal |
Origin of the semitendinosus | Ishial tuberosity |
Insertion of the semitendinosus | Proximal, medial shaft of the tibia |
Action of the semitendinosus | Flex and medially rotate flexed knee Extend hip and medially rotate the hip; tilt pelvis posteriorly |
Nerve innervation of the semitendinosus | Tibial |
Origin of the semimembranosus | Ishial tuberosity |
Insertion of the semimembranosus | Posterior aspect of medial condyle of tibia |
Action of semimembranosus | Flex & medially rotate flexed knee Extend hip and medially rotate hip; tilt pelvis posteriorly |
Nerve innervation of semimembranosus | Tibial |
Origin of sartorius | Anterior superior iliac spine (ASIS) |
Insertion of sartorius | Proximal, medial shaft of tibia (pes anserinus tendon) |
Action of sartorius | Flexes and medially rotates flexed knee, flex, abduct and laterally rotate hip |
Nerve innervation of sartorius | Femoral |
Origin of the rectus femoris | Anterior inferior ilia spine (AIIS) |
Insertion of the rectus femoris | Tibial tuberosity |
Action of the rectus femoris | Flex the hip & extend the knee |
Nerve innervation of the rectus femoris | Femoral |
Origin of the vastus intermedius | Anterior & lateral shaft of the femur |
Insertion of the vastus intermedius | Tibial tuberosity |
Action of the vastus intermedius | Extend the knee |
Nerve innervation of the vastus intermedius | Extend the knee |
Origin of the vastus medialis | Medial lip of linea aspera |
Insertion of the vastus medialis | Tibial tuberosity |
Action of the vastus medialis | Extend the knee |
Nerve innervation of the vastus medialis | Femoral |
Origin of the vastus lateralis | Lateral lip of linea aspera |
Insertion of the vastus lateralis | Tibial tuberosity |
Action of the vastus lateralis | Extend the knee |
Nerve innervation of the vastus lateralis | Femoral |