Anterior Thigh Muscles Flashcards
Pectineus Insertion
Pectineal line of femur, just inferior to lesser trochanter
Pectineus Origin
Superior ramus of pubis
Pectineus Innervation
Femoral Nerve (L2, L3); may receive branch from obturator nerve
Pectineus Action
Adducts and flexes thigh
Assists with medial rotation of thigh
Sartorius Origin
- Anterior Superior Iliac Spine
2. Superior part of notch inferior to it
Sartorius Insertion
Superior part of medial surface of tibia
Sartorius Innervation
Femoral Nerve (L2, L3)
Sartorius Action
Flexes, abducts, and laterally rotates thigh at hip joint
Flexes leg at knee
Psoas Major Origin
- Sides of T12-L5 vertebrae and discs between them
2. Transverse processes of all lumbar vertebrae
Psoas Major Insertion
Lesser trochanter of femur
Psoas Major Innervation
Anterior rami of lumbar nerves (L1, L2, L3)
Psoas Major Action
Acting conjointly with iliacus in flexing thigh at hip joint and in stabilizing joint;
postural muscle that helps control deviation of the trunk and is active during standing
Iliacus Origin
- Iliac crest
- Iliac fossa
- Ala of sacrum
- Anterior sacroiliac ligaments
Iliacus Insertion
- Tendon of psoas major
2. lesser trochanter and femur distal to it
Iliacus Innvervation
Femoral Nerve (L2, L3)
Iliacus Action
Acting conjointly with psoas major in flexing thigh at hip joint and stabilizing joint
Rectus Femoris Origin
- Anterior inferior iliac spine
2. Ilium superior to acetabulum
Rectus Femoris, Vastus lateralis,Vastus Medialis, Vastus Intermedialis Insertion
- Common tendinous (quadriceps tendon) and independent attachments to base of patella
- Indirectly via patellar ligament to tibial tuberosity
- medial and lateral vasti also attach to tibia and patella via aponeuroses (medial and lateral patellar retinacula)
Rectus Femoris, Vastus lateralis, Vastus medialis, Vastus intermedius Innervation
Femoral Nerve (L2, L3, L4)
Rectus Femoris, Vastus lateralis, Vastus medialis, Vastus intermedius (Quadriceps Femoris) Action
Extends leg at knee
Rectus Femoris also steadies hip joint and helps iliopsoas flex thigh
Vastus lateralis origin
greater trochanter and lateral lip of linea aspera
Vastus Medialis Origin
Intertrochanteric line and medial lip of linea aspera of femur
Vastus Intermedius Origin
Anterior and lateral surfaces of shaft of femur
