Anterior and Medial Thigh OIIA

sartorius origin

anterior superior iliac spine

sartorius insertion

pes anserinus (proximal portion of the medial aspect of the tibia)

sartorius action

-flex hip

-flex knee

-laterally rotates hip

-abduction of hip

-medial rotation of tibia

sartorius innervation

femoral nerve

rectus femoris origin

-anterior inferior iliac spine

-reflected head from lateral surface of ilium, just superior to acetabulum

rectus femoris insertion

tibial tuberosity (patellar (quad) tendon into the base of the patella, and patellar ligament into tibial tuberosity)

rectus femoris action

-knee extension

-hip felxion

rectus femoris innervation

femoral nerve

vastus lateralis origin

greater trochanter and linea aspera (lateral surface of femur just distal to greater trochanter and along lateral lip of linea aspera)

vastus lateralis insertion

patella and tibial tuberosity (patellar (quad) tendon into the base of the patella, and patellar ligament into tibial tuberosity)

vastus lateralis action

knee extension

vastus lateralis innervation

femoral nerve

vastus medialis origin

linea aspera (from medial surface of the femur just inferior to the intertrochanteric line along the medial lip of linea aspera)

vastus medialis insertion

patella and tibial tuberosity (patellar (quad) tendon into the base of the patella, and patellar ligament into tibial tuberosity)

vastus medialis action

knee extension

vastus medialis innervation

femoral nerve

vastus intermedius origin

anterior and lateral shaft of femur

vastus intermedius insertion

patella and tibial tuberosity (patellar (quad) tendon into the base of the patella, and patellar ligament into tibial tuberosity)

vastus intermedius action

knee extension

vastus intermedius innervation

femoral nerve

articularis genu origin

distal 1/4 of the anterior surface of femur

articularis genu insertion

suprapatellar bursa (superior extension of knee's synovial membrane)

articularis genu action

superior extension of knee synovial membrane (lift joint capsule to create space for movement)

articularis genu innervation

femoral nerve

iliopsoas origin

-iliacus: pelvic surface of iliac fossa

-psoas major: superior and inferior edges of vertebral bodies, L2-L4

iliopsoas insertion

lesser trochanter of femur

iliopsoas action

hip flexion

iliopsoas innervation

-iliacus: femoral nerve fibers

-psoas major: branches from lumbar plexus, L2-L4

pectineus origin

pectin of the pubis (superior pubic ramus)

pectineus insertion

pectineal line of femur

pectineus action

-hip flexor

-possible hip adduction

pectineous innervation

-femoral nerve

-obturator nerve (possibly accessory obturator)

adductor longus origin

anterior aspect of pubis body (inferior to pubic tubercle)

adductor longus insertion

middle 1/3 of linea apsera (between adductor magnus and vastus medialis)

adductor longus action

-primarily adducts hips

-assists with hip flexion

adductor longus innervation

anterior branch/portion of obturator nerve

adductor brevis origin

body and inferior ramus of pubis

adductor brevis insertion

proximal 1/3 of linea aspera (lies posterior to pectineus and adductor longus)

adductor brevis action

-primarily adducts hip

-possibly assists in hip flexion

adductor brevis innervation

anterior branch of obturator nerve

gracilis origin

body and inferior ramus of pubis

gracilis insertion

pes anserine (proximal portion of medial aspect of tibia)

gracilis action

-adducts hip

-flexes knee

-medially rotates tibia

gracilis innervation

anterior branch of obturator nerve

adductor magnus origin

-inferior pubic ramus

-ischial ramus

-ischeal tuberosity (posterior fibers)

adductor magnus insertion

-linea aspera (anterior fibers pass through horizontally into proximal portion of linea aspera. posterior fibers pass into inferior points along linea aspera)

-adductor tubercle of femur (most posterior fibers)

adductor magnus action

-adduction of hip

-possible assistance in hip flexion (anterior 2/3 of muscle)

-possible assistance in hip extension (posterior 1/3 of muscle)

adductor magnus innervation

-posterior branch of obturator nerve (anterior 2/3 of muscle)

-tibial nerve (posterior 1/3 of muscle)

obturator externus origin

-external surface of obturator membrane

-periphery of obturator foramen

obturator externus insertion

trochanteric fossa

obturator externus action

lateral rotation of hip

obturator externus innervation

obturator nerve