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Muscles of the Lower Limb - Anatomy & Physiology

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Terms in this set (20)

  • Iliopsoas (Psoas major) origin and insertion

    Origin: Transverse processes and bodies of lumbar vertebrae.
    Insertion: Lesser trochanter of femur (fusing with iliacus).

  • Iliopsoas (Psoas major) actions and innervation

    Actions: Flexion and lateral rotation of thigh at hip joint; flexion of trunk on hip.
    Innervation: Lumbar spinal nerves L2-L3.

  • Psoas minor origin, insertion, and action

    Origin: 12th thoracic and 1st lumbar vertebrae.
    Insertion: Iliopectineal line (or fused with psoas major).
    Action: Flexion of pelvis on abdomen.

  • Iliacus origin, insertion, action, and innervation

    Origin: Iliac fossa and sacrum.
    Insertion: Tendon of psoas major into lesser trochanter of femur.
    Action: Flexion and lateral rotation of thigh at hip joint.
    Innervation: Femoral nerve.

  • Gluteus maximus origin, insertion, action, and innervation

    Origin: Iliac crest, posterior gluteal line, sacrum, and coccyx.
    Insertion: Iliotibial tract of fascia lata and gluteal tuberosity of femur.
    Action: Extension and lateral rotation of thigh.
    Innervation: Inferior gluteal nerve.

  • Gluteus medius origin, insertion, action, and innervation

    Origin: Ilium between anterior and posterior gluteal lines.
    Insertion: Greater trochanter of femur.
    Action: Abduction and medial rotation of thigh.
    Innervation: Superior gluteal nerve.

  • Gluteus minimus origin, insertion, action, and innervation

    Origin: Ilium between anterior and inferior gluteal lines.
    Insertion: Greater trochanter of femur.
    Action: Abduction and medial rotation of thigh.
    Innervation: Superior gluteal nerve.

  • Tensor fascia latae origin, insertion, action, and innervation

    Origin: Anterior superior iliac spine and iliac crest.
    Insertion: Iliotibial tract attaching to lateral tibia.
    Action: Flexion and abduction of thigh at hip joint.
    Innervation: Superior gluteal nerve.

  • Piriformis origin, insertion, action, and innervation

    Origin: Anterior surface of sacrum.
    Insertion: Greater trochanter of femur.
    Action: Lateral rotation and abduction of thigh at hip joint.
    Innervation: Sacral plexus.

  • Superior gemellus origin, insertion, action, and innervation

    Origin: Ischial spine.
    Insertion: Greater trochanter of femur.
    Action: Laterally rotates and abducts thigh at hip joint.
    Innervation: Lumbosacral plexus.

  • Obturator internus origin, insertion, action, and innervation

    Origin: Inner surface of obturator foramen, pubis, and ischium.
    Insertion: Greater trochanter of femur.
    Action: Laterally rotates and abducts thigh at hip joint.
    Innervation: Lumbosacral plexus.

  • Inferior gemellus origin, insertion, action, and innervation

    Origin: Ischial tuberosity.
    Insertion: Greater trochanter of femur.
    Action: Laterally rotates and abducts thigh at hip joint.
    Innervation: Lumbosacral plexus.

  • Quadratus femoris origin, insertion, action, and innervation

    Origin: Ischial tuberosity.
    Insertion: Quadrate tubercle of femur.
    Action: Laterally rotates thigh at hip joint.
    Innervation: Lumbosacral plexus.

  • Obturator externus origin, insertion, action, and innervation

    Origin: Outer surface of obturator foramen and membrane.
    Insertion: Trochanteric fossa of femur.
    Action: Laterally rotates and abducts thigh at hip joint.
    Innervation: Obturator nerve.

  • Sartorius origin, insertion, action, and innervation

    Origin: Anterior superior iliac spine.
    Insertion: Proximal medial surface of shaft of tibia.
    Action: Flexion, abduction, and lateral rotation of thigh; flexion of leg.
    Innervation: Femoral nerve.

  • Rectus femoris origin, insertion, action, and innervation

    Origin: Anterior inferior iliac spine.
    Insertion: Patella via quadriceps tendon, then tibial tuberosity via patellar ligament.
    Action: Extension of leg at knee; flexion of thigh at hip.
    Innervation: Femoral nerve.

  • Vastus lateralis origin, insertion, action, and innervation

    Origin: Greater trochanter and lateral margin of linea aspera of femur.
    Insertion: Patella via quadriceps tendon, then tibial tuberosity via patellar ligament.
    Action: Extension of leg at knee.
    Innervation: Femoral nerve.

  • Vastus intermedius origin, insertion, action, and innervation

    Origin: Anterior and lateral surfaces of shaft of femur.
    Insertion: Patella via quadriceps tendon, then tibial tuberosity via patellar ligament.
    Action: Extension of leg at knee.
    Innervation: Femoral nerve.

  • Vastus medialis origin, insertion, action, and innervation

    Origin: Medial margin of linea aspera of femur.
    Insertion: Patella via quadriceps tendon, then tibial tuberosity via patellar ligament.
    Action: Extension of leg at knee.
    Innervation: Femoral nerve.

  • Pectineus origin, insertion, action, and innervation

    Origin: Superior ramus of pubis.
    Insertion: Pectineal line of femur between lesser trochanter and linea aspera.
    Action: Flexion and adduction of thigh at hip.
    Innervation: Femoral nerve.