Exam 4 Actions, Innervations, Origin, Insertions

Levator Ani action

Supports pelvic viscera; raises pelvic floor

gluteus maximus origin

Gluteal surface of ala of ilium.

gluteus maximus insertion

Gluteal tuberosity of femur, and iliotibial tract.

gluteus maximus action

Major extensor of the thigh (especially from sitting position)

gluteus maximus innervation

Inferior gluteal nerve.

Gluteus medius origin

Gluteal surface of ala of ilium.

Gluteus medius insertion

Greater trochanter of femur.

Gluteus medius action

OKC= Abducts and medially rotates the thigh.

CKC=Steadies the pelvis during gait (prevents dipping to contralateral side).

Gluteus medius innervation

Superior gluteal nerve.

Gluteus minimus origin

Gluteal surface of ala of ilium.

Gluteus minimus insertion

Greater trochanter of femur.

Gluteus minimus action

OKC= Abducts and medially rotates the thigh.

CKC=Steadies the pelvis during gait (prevents dipping to contralateral side).

Gluteus minimus innervation

Superior gluteal nerve.

Piriformis origin

Anterior surface of sacrum.

Piriformis insertion

Greater trochanter of femur.

Piriformis action

Laterally rotate the thigh.

Piriformis innervation

Nerve to piriformis. 

Obturator internus origin

Internal surface of obturator membrane.

Obturator internus insertion

Greater trochanter of femur.

Obturator internus action

Laterally rotate the thigh.

Obturator internus innervation

Nerve to obturator internus and gemellus superior.

Gemellus superior origin

Body of ischium.

Gemellus superior insertion

Greater trochanter of femur.

Gemellus superior action

Laterally rotate the thigh.

Gemellus superior innervation

Nerve to obturator internus and gemellus superior.

Gemellus inferior origin

Body of ischium.

Gemellus inferior insertion

Greater trochanter of femur.

Gemellus inferior action

Laterally rotate the thigh.

Gemellus inferior innervation

Nerve to quadratus femoris and gemellus inferior.

Quadratus femoris origin

Body of ischium.

Quadratus femoris insertion

Intertrochanteric crest.

Quadratus femoris action

Laterally rotate the thigh.

Quadratus femoris innervation

Nerve to quadratus femoris and gemellus inferior.

Pectineus origin

Superior ramus of pubis.

Pectineus insertion

Shaft of femur.

Pectineus action

Adduct the thigh.

Pectineus innervation

Femoral nerve.

Gracilis origin

Body and inferior ramus of pubis.

Gracilis insertion

Pes Anserinus.

Gracilis action

Adducts the thigh.

Flexes and medially rotates the leg.

Gracilis innervation

Obturator nerve.

Adductor longus origin

Body of pubis.

Adductor longus insertion

Shaft of femur.

Adductor longus action

Adduct the thigh.

Adductor longus innervation

Obturator nerve.

Adductor brevis origin

Body and inferior ramus of pubis.

Adductor brevis insertion

Shaft of femur.

Adductor brevis action

Adduct the thigh.

Adductor brevis innervation

Obturator nerve.

Adductor magnus origin

Inferior ramus of pubis.

Ramus and body of ischium.

Adductor magnus insertion

Shaft of femur.

Adductor magnus action

Adduct the thigh.

Adductor magnus innervation

Obturator nerve.

Obturator externus origin

External surface of obturator membrane.

Obturator externus insertion

Greater trochanter.

Obturator externus action

laterally rotates the thigh.

Obturator externus innervation

Obturator nerve.

Semitendinosus origin

Ischial tuberosity.

Semitendinosus insertion

Pes Anserinus.

Semitendinosus action

Extend the thigh.

Flex and medially rotate the leg.

Semitendinosus innervation

Tibial portion of the sciatic nerve.

Semimembranosus origin

Ischial tuberosity.

Semimembranosus insertion

Posterior aspect of medial condyle of tibia.

Semimembranosus action

Extend the thigh.

Flex and medially rotate the leg.

Semimembranosus innervation

Tibial portion of the sciatic nerve.

Biceps femoris – Long head origin

Ischial tuberosity.

Biceps femoris – Long head insertion

Head of fibula.

Biceps femoris – Long head action

Extend the thigh.

Flex and laterally rotate the leg.

Biceps femoris – Long head innervation

Common peroneal portion of the sciatic nerve.

Biceps femoris – Short head origin

Shaft of femur.

Biceps femoris – Short head insertion

Head of fibula.

Biceps femoris – Short head action

Extend the thigh.

Flex and laterally rotate the leg.

Biceps femoris – Short head innervation

Common peroneal portion of the sciatic nerve.

Iliopsoas origin

Psoas major – T12 to L5 vertebrae.

Iliacus – Iliac fossa.

Iliopsoas insertion

Lesser trochanter of femur.

Iliopsoas action

Major flexor of the thigh.

Iliopsoas innervation

Ventral rami of lumbar nerves and femoral nerve.

Tensor fascia lata origin

Gluteal surface of ala of ilium.

Tensor fascia lata insertion

Iliotibial tract.

Gerdy’s tubercle on lateral condyle of tibia.

Tensor fascia lata action

Stabilizes the hip joint.

Steadies the femur on the tibial condyles.

Tensor fascia lata innervation

Superior gluteal nerve.

Sartorius origin

Anterior superior iliac spine.

Sartorius insertion

Pes Anserinus (superior part of medial surface of shaft of tibia).

Sartorius action

Abducts, flexes, and laterally rotates the thigh.

Flexes and medially rotates the leg.

Sartorius innervation

Femoral nerve.

Quadriceps femoris -Rectus femoris origin

Anterior inferior iliac spine.

Acetabular brim.

Quadriceps femoris -Rectus femoris insertion

Patella and then into the tibial tuberosity via the ligamentum patellae.

Quadriceps femoris -Rectus femoris action

Extends the leg.

Flexes the thigh.

Quadriceps femoris -Rectus femoris innervation

Femoral nerve.

Quadriceps femoris - Vastus medialis origin

Shaft of femur.

Quadriceps femoris - Vastus medialis insertion

Patella and then into the tibial tuberosity via the ligamentum patellae.

Quadriceps femoris - Vastus medialis action

Extends the leg.

Pulls the patella medially.

Quadriceps femoris - Vastus medialis innervation

femoral nerve

Quadriceps femoris - Vastus intermedius origin

Shaft of femur.

Quadriceps femoris - Vastus intermedius insertion

Patella and then into the tibial tuberosity via the ligamentum patellae.

Quadriceps femoris - Vastus intermedius action

extends the leg.

Quadriceps femoris - Vastus intermedius innervation

femoral nerve

Quadriceps femoris - Vastus lateralis origin

Shaft of femur.

Quadriceps femoris - Vastus lateralis insertion

Patella and then into the tibial tuberosity via the ligamentum patellae.

Quadriceps femoris - Vastus lateralis action

Extends the leg.

Pulls the patella laterally.