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Iliacus
- Origin= Iliac fossa, ala of sacrum.
- Insertion= Lesser trochanter of femur via iliopsoas tendon.
- Action= thigh flexion, flexing trunk
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Psoas
- Origin= by fleshy slips from transverse processes, bodies and discs of lumbar vertebrae and T12.
- Insertion= Lesser trochanter of femur via iliopsoas tendon.
- Action= Lateral flexion of vertebral column; postural muscle.
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Sartotious
- Origin= Anterior superior iliac spine
- Insertion= Winds around medial aspect of knee and inserts into medial aspect of proximal tibia.
- Action= Flexes, abducts, and laterally rotates thigh; flexes knee.
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Adductor longus
- Origin= Pubis near pubis symphysis
- Insertion= Linea aspera/
- Action= Adducts, flexes and medially rotates thigh.
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Gracilis (skip)
- Origin= Inferior ramus and body of pubis and adjacent ischial ramus.
- Insertion= Medial surface of tibia just inferior to its medial condyle.
- Action= Adducts thigh, flexes and medially rotates leg.
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Rectus femoris
- Origin= anterior inferior iliac spine and superior margin of acetabulum
- Insertion= Patella and tibial tuberosity via patellar ligament.
- Action= Extends knee and flexes thigh at hip
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Vastus Lateralis (skip)
- Origin= Greater trochanter, intertrochanteric line, linea aspera.
- Insertion= As for rectus femoris.
- ACtion= Extends and stabilizes knee
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Vastus intermedious
- Origin= Anterior and lateral surfaces of proximal femur shaft
- Insertion= As of rectus femoris.
- Action= Extends knee
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Vastus medialis (skip)
- Origin= Linea aspera, medial supracondylar line, intertrochanteric line.
- Insertion= As for rectus femoris.
- Action= Extends knee/
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Tensor Fasciae Latae
- Origin= Anterior aspect of iliac crest and anterior superior iliac spine.
- Insertion= Iliotibial tract.
- Action= Flexes and abducts thigh rotates thigh medially.
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Gluteus maximus
- Origin= Dorsal ilium, sacrum and coccyx.
- Insertion= Gluteal tuberosity of femur; iliotibial tract.
- Action= extensor of thigh. Laterally rotates and abducts thigh
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Gluteus medius
- Origin= Between anterior and posterior gluteal lines on lateral surface f ilium.
- Insertion= By short tendon into lateral aspect of greater trochanter of femur.
- Action= abducts and medially rotates thigh
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Biceps Femoris
- Origin= ischial tuberosity; linea aspera, lateral supracondylar line and distal femur.
- Insertion= Common tendon passes downward and laterally to insert into head of fibula and lateral condyle of tibia.
- Action= extends thigh and flexes knee; laterally rotates leg.
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Semitendinosus
- Origin= Ischial tuberosity in common with long head of biceps femoris.
- Insertion= Medial aspect of upper tibial shaft.
- Action= Extends thigh at hip; flexes knee.
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Semimembranosus (skip)
- Origin= Ischial tuberosity.
- Insertion= medial condyle of tibia; through oblique ligament to lateral condyle of femur.
- Action= Extends thigh and flexes knee; medially rotates leg.
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