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Rectus Femoris
*Only quadraceps muscle to cross the hip
O: AIIS
I: Patellar tendon
A: Hip flexion, knee extension
Innervation: Femoral n.
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Vastus Intermedius
O: Anterior and Lateral femoral shaft
I: Patellar tendon
A: Knee extension
Innervation: Femoral n.
-
Vastus Lateralis
O: Linea aspera on posterior femur
I: Patellar tendon
A: Knee extension
Innervation: Femoral n.
-
Vastus Medialis Oblique
O: Linea aspera on posterior femur
I: Patellar tendon
A: Knee extension
Innervation: Femoral n.
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Biceps Femoris
O: Long head = ischial tuberosity; short head = linea aspera
I: Head of fibula; posterolateral tibia
A: Long = hip extension, both = knee flexion
Innervation: Long = tibial sciatic n. ; short = peroneal sciatic n.
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Semimembranosus
O: Ischial tuberosity
I: Posterior Medial Tibial Condyle
A: Hip extension, knee flexion
Innervation: tibial sciatic n.
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Semitendinosus
O: Ischial tuberosity
I: Anterior Medial Tibial Shaft
A: Hip extension, knee flexion
Innervation: tibial sciatic n.
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Gracilis
O: Anterior pubis
I: Midal Tibial
A: Hip adduction
Innervation: Obdurator n.
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Adductor Magnus
O: Ischial tuberosity, pubic ramus
I: Linea aspera of posterior femur, adductor tubercle
A: hip adduction, anterior flexion of hip, posterior extention of hip
Innervation: Obdurator n. and Sciatic n.
-
Adductor Longus
O: Anterior pubis
I: Linea aspera on posterior femur
A: Hip adduction, flexion, and external rotation
Innervation: Obdurator n.
*Forms medial border of femoral triangle
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