2026 mm anterior thigh

origin of pectineus:

pecten pubis, of superior pubic ramus

insertion of pectineus:

pectineal line of femur, just inferior to lesser trochanter

action of the pectineus:

adducts and flexes hip, assists with medial rotation of hip

innervation of pectineus:

femoral n L2-3 (sometimes obturator n)

origin of iliacus:

iliac crest, superior 2/3 of iliac fossa, ala of sacrum, and anterior sacroiliac ligaments

insertion of iliacus:

tendon of psoas major mm to lesser trochanter of femur

action of iliacus:

flexes hip, stabilizes hip joint

innervation of iliacus:

femoral n. L2-3

origin of sartorius:

anterior superior iliac spine (ASIS)

insertion of sartorius:

superior part of medial tibia

action of sartorius:

abduction, lateral rotation, and flexion of hip

flexes knee

innervation of sartorius:

femoral n. L2-3

origin of rectus femoris:

anterior inferior iliac spine (AIIS)

insertion of rectus femoris:

tibial tuberosity via patellar ligament

action of rectus femoris:

flexes hip, extends knee

innervation of rectus femoris:

femoral n L2-4

origin of vastus lateralis:

greater trochanter and lateral lip of linea aspera of femur

insertion of vastus lateralis:

tibial tuberosity vis patellar ligament

action of vastus lateralis:

extends knee

innervation of vastus lateralis:

femoral n. L2-4

origin of vastus medialis:

intertrochanteric line and medial lip of linea aspera of femur

insertion of vastus medialis:

tibial tuberosity via patellar ligament

action of vastus medialis:

extends knee

innervation of vastus medialis:

femoral n L2-4

origin of vastus intermedius:

anterior and lateral surfaces of shaft of femur

insertion of vastus intermedius:

tibial tuberosity vis patellar ligament

action of vastus intermedius:

extends knee

innervation of vastus intermedius:

femoral n L2-4