Anatomy - MOINA of the Anterior Fascial Compartment of the Thigh

origin of sartorius

anterior superior iliac spine

insertion of sartorius

upper medial surface of shaft of tibia

innervation of sartorius

femoral nerve

action of sartorius

• flexes, abducts, laterally rotates thigh at hip joint

• flexes and medially rotates leg at knee joint

origin of iliacus

iliac fossa of hip bone

insertion of iliacus

with psoas into lesser trochanter of femur

innervation of iliacus

femoral nerve

action of iliacus

• flexes thigh on trunk

• if thigh is fixed, it flexes trunk on the thigh as in sitting up from lying down

origin of psoas

transverse processes, bodies, and intervertebral discs of the 12th thoracic and 5 lumbar vertebrae

insertion of psoas

with iliacus into lesser trochanter of femur

innervation of psoas

lumbar plexus

action of psoas

• flexes thigh on trunk

• if thigh is fixed, it flexes trunk on the thigh as in sitting up from lying down

origin of pectineus

superior ramus of pubis

insertion of pectineus

upper end of linea aspera of shaft of femur

innervation of pectineus

femoral nerve

action of pectineus

flexes and adducts thigh at hip joint

origin of rectus femoris

• straight head: anterior inferior iliac spine

• reflected head: ilium above acetabulum

insertion of rectus femoris

quadriceps tendon into patella, then via ligamentum patellae into tubercle of tibia

innervation of rectus femoris

femoral nerve

action of rectus femoris

• extension of leg at knee joint

• flexes thigh at hip joint

origin of vastus lateralis

upper end of shaft of femur

insertion of vastus lateralis

quadriceps tendon into patella, then via ligamentum patellae into tubercle of tibia

innervation of vastus lateralis

femoral nerve

action of vastus lateralis

extension of leg at knee joint

origin of vastus medialis

upper end of shaft of femur

insertion of vastus medialis

quadriceps tendon into patella, then via ligamentum patellae into tubercle of tibia

innervation of vastus medialis

femoral nerve

action of vastus medialis

• extension of leg at knee joint

• stabilizes patella

origin of vastus intermedius

anterior and lateral surfaces of shaft of femur

insertion of vastus intermedius

quadriceps tendon into patella, then via ligamentum patellae into tubercle of tibia

innervation of vastus intermedius

femoral nerve

action of vastus intermedius

• extension of leg at knee joint

• articularis genus retracts synovial membrane