Muscles OIAI

adductor longus origin

pubic tubercle

adductor brevis origin

inferior ramus of pubis

adductor brevis insertion

pectineal line and medial lip of linea aspera

adductor magnus origin

Inferior ramus of the pubis, ramus of ischium and ischial tuberosity

adductor magnus insertion

Medial lip of linea aspera & adductor tubercle of femur

gracilis origin

inferior ramus of pubis

gracilis insertion

Proximal, medial shaft of tibia at pes anserinus tendon

obturator externus insertion

trochanteric fossa of femur

sartorius action

Hip flexion, lateral rotation (ER), abduction

Knee flexion and medial rotation (IR) of the flexed knee

sartorius origin

anterior superior iliac spine

sartorius insertion

Proximal, medial shaft of the tibia at pes anserinus tendon

vastus lateralis origin

Lateral lip of linea aspera

Gluteal tuberosity

Greater trochanter

vastus intermedius origin

anterior and lateral shaft of femur

pectineus insertion

pectineal line of femur

semitendinosus origin

ischial tuberosity

semitendinosus insertion

Medial surface of proximal end of tibia at pes anserinus tendon

semimembranosus insertion

posterior surface of medial condyle of tibia

biceps femoris origin

Long head: Ischial tuberosity

Short head: distal, lateral lip of linea aspera

biceps femoris insertion

head of fibula

gluteus maximus action

All fibers: extension, lateral rotation (ER), abduction of hip

Lower fibers (secondary action): adduction of hip

gluteus medius action

Main (all fibers): hip abduction

Anterior fibers: hip flexion & medial rotation (IR)

Posterior fibers: hip extension & lateral rotation (ER)

gluteus minimus action

Hip flexion, medial rotation (IR) & abduction

tensor fasciae latae action

Hip abduction, flexion, medial rotation (IR)

piriformis action

Lateral rotation (ER), abducts the hip when hip is flexed

obturator internus action

lateral rotation (ER) of hip

superior gemellus action

lateral rotation (ER) of hip

inferior gemellus action

lateral rotation (ER) of hip

quadratus femoris action

lateral rotation (ER) of hip

gluteus maximus origin

Coccyx, edge of sacrum, posterior iliac crest, sactrotuberous & sacroiliac ligaments

gluteus maximus insertion

Iliotibial tract (IT band) and gluteal tuberosity (lower fibers)

gluteus medius origin

Gluteal surface of ilium

Between posterior & anterior gluteal lines; just below the iliac crest

gluteus medius insertion

lateral aspect of greater trochanter of femur

gluteus minimus origin

Gluteal surface of the ilium between the anterior and inferior gluteal lines

gluteus minimus insertion

anterior surface of greater trochanter

tensor fasciae latae origin

Iliac crest, posterior to the ASIS

tensor fasciae latae insertion

iliotibial tract (IT band)

piriformis origin

anterior surface of sacrum

(between S2 and S4)

piriformis insertion

Superior border of greater trochanter of femur

obturator internus insertion

medial surface of greater trochanter

superior gemellus origin

ischial spine

superior gemellus insertion

medial surface of greater trochanter

inferior gemellus origin

ischial tuberosity

inferior gemellus insertion

medial surface of greater trochanter

quadratus femoris origin

lateral border of ischial tuberosity

quadratus femoris insertion

intertrochanteric crest

(between greater and lesser trochanter)

adductor longus action

adduction & medial rotation

assists in hip flexion

adductor longus insertion

medial lip of linea aspera

adductor brevis action

adduction & medial rotation

assists in hip flexion

adductor magnus action

adduction & medial rotation

assists in hip flexion

- posterior fibers extend hip

gracilis action

Adduction, medial rotation (IR) of hip

Knee flexion

Medial rotation (IR) of the flexed knee

obturator externus action

lateral rotation (ER)

obturator externus origin

Rami of pubis and ischium, obturator membrane

Quadratus Lumborum

group of quad muscles

rectus femoris, vastus lateralis, vastus medialis, vastus intermedius

rectus femoris action

hip flexion, knee extension

rectus femoris origin

anterior inferior iliac spine (AIIS)

rectus femoris insertion

tibial tuberosity

vastus lateralis action

knee extension

vastus lateralis insertion

tibial tuberosity

vastus medialis action

knee extension

vastus medialis origin

medial lip of linea aspera

vastus medialis insertion

tibial tuberosity

vastus intermedius action

knee extension

vastus intermedius insertion

tibial tuberosity

pectineus action

Hip adduction, medial rotation (IR)

Assists to flex hip

pectineus origin

superior ramus of pubis

semitendinosus action

Knee flexion, medial rotation (IR) of flexed knee

Hip extension, assists to IR the hip

Tilts pelvis posteriorly

semimembranosus action

Knee flexion, medial rotation (IR) of flexed knee

Hip extension, assists to IR the hip

Tilts pelvis posteriorly

semimembranosus origin

ischial tuberosity

biceps femoris action

Knee flexion, lateral rotation (ER) of flexed knee

Long head: hip extension, assists to ER the hip

obturator internus origin

Obturator membrane and inferior surface of obturator foramen

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