Muscles 68

• Origin: upper two thirds of iliac foassa, ala of sacrum and adjacent ligaments anterior inferior iliac spine
• Insertion: onto tendon of psoas major, which continues into lesser trochanter of femur (together the two muscles form the iliopsoas)
• Action: Flexes thigh at hip joint
• Nerve: femoral nerve (L2. L3)

• Origin: Anterior superior iliac spine and area immediately below it
• Insertion: Upper part of medial surface of shaft of tibia
• Action: Flexes, abducts, and laterally rotates thigh at hip joint, flexes and slightly medially rotates leg at knee joint after flexion
• Nerve: Femoral nerve (L2, L3)

• Origin: Anterior head-anterior inferior iliac spine. Posterior head-ilium above acetabulum.
• Insertion: Patella, then by patellar ligament to tuberosity of the tibia
• Action: exte

• Origin: Intertrochanteric line, inferior border of greater tuberosity, lateral lip of linea aspera of femur
• Insertion: Lateral margin of patella, then by patellar ligament to tuberosity

• Origin: Intertrocanteric line, medial lip of linea aspera of femur, medial intermuscular septum, medial supracondylar line
• Insertion: Medial border of the patella, then by patellar ligament into tibial tuberosity, medial condyle of tibia
• Action: Extends leg at knee joint
• Nerve: Femoral nere (L2-L4)

• Origin: Anterior and lateral surfaces of upper two-thirds of femur, lateral intermuscular septum, linea aspera lateral supracondylar line
• Insertion: Deep aspect of quadriceps tendon then through

• Origin: Lower margin of body and inferior ramus of pubis
• Insertion: Upper part of medial surface of shaft of tibia
• Action: Adducts thigh at hip joint and flexes leg at knee joint, with leg flexed, assists in medial rotation
• Nerve: Obturator nerve

• Origin: Pectineal line on superior ramus of pubis
• Insertion: From lesser trochanter to linea aspera of femur

• Origin: Anterior of body of pubis
• Insertion: Medial lip of linea aspera
• Action: Adducts, flexes thigh, assists in medial rotation
• Nerve: Obturator nerve (L3,L4)

Origin: Outer surface of ilium behind posterior gluteal line, adjacent posterior surface of sacrum and coccyx, sacrotuberous ligament, aponeurosis of erector spinae (sacrospinalis)