Muscles of the Lower Extremity: Anterior compartment of the Thigh Flashcards
Psoas Major Proximal Attachment
Transverse processes, intervertebral discs, and adjacent bodies of T12-L5
Psoas Major Distal Attachment
Lesser trochanter of the femur
Psoas Major Innervation
Femoral n. [L1,L2,L3]
Psoas Major Action
Flexes the hip Assists with: -Hip lateral rotation -Lumbar side flexion -Lumbar stabilization -Anterior pelvic tilt
Iliacus Proximal Attachment
Iliac fossa and anterior ligaments of the lumbosacral and sacroiliac joints
Iliacus Distal Attachment
Lesser trochanter of the femur
Iliacus Innervation
Femoral n. [L1,L2,L3]
Iliacus Action
Flexes the hip
Assists with:
-Hip lateral rotation
-Anterior pelvic tilt
Sartorius Proximal Attachment
ASIS
Sartorius Distal Attachment
Medial surface of tibia below the tibial condyle (Pes anserinus)
Sartorius Innervation
Femoral n. [L2,L3]
Sartorius Action
Flexes the hip Laterally rotates the hip Abducts the hip Assists with: -Knee flexion -Tibia medial rotation
Pectineus Proximal Attachment
Superior ramus of the pubis
Pectineus Distal Attachment
Pectineal line of the femur
Pectineus Innervation
Femoral n. and Obturator n. [*L2,L3]
Pectineus Action
Adducts the hip
Assists with:
-Hip flexion
Rectus Femoris Proximal Attachment
AIIS
Rectus Femoris Distal Attachment
Tibial tuberosity via the patellar ligament
Rectus Femoris Innervation
Femoral n. [L2,L3,L4]
Rectus Femoris Action
Flexes the hip
Extends the knee
Vastus Medialis Proximal Attachment
Inter trochanteric line and medial lip of the linea aspera
Vastus Medialis Distal Attachment
Tibial tuberosity via the patellar ligament
Vastus Medialis Innervation
Femoral n. [L2,L3,L4]
Vastus Medialis Action
Extends the knee
Vastus Lateralis Proximal Attachment
Proximal 1/2 of lateral lip of the linea aspera
Vastus Lateralis Distal Attachment
Tibial tuberosity via the patellar ligament
Vastus Lateralis Innervation
Femoral n. [L2,L3,L4]
Vastus Lateralis Action
Extends the knee
Vastus Intermedius Proximal Attachment
Anterior and lateral surfaces of the proximal shaft of the femur
Vastus Intermedius Distal Attachment
Tibial tuberosity via the patellar ligament
Vastus Intermedius Innervation
Femoral n. [L2,L3,L4]
Vastus Intermedius Action
Extends the knee