Structures

  • Psoas major
  • Iliacus
  • Psoas minor
  • Rectus femoris
  • Sartorius
MuscleActionOriginInsertionInnervationBlood supply
Psoas major- Main flexor of hip- Transerve processes of L1-5
- Vertebral bodies and discs of T12- L5
- Lesser trochanter of femur- Direct fibres of L1 - L3 of lumbar plexus- Lumbar branch of iliolumbar artery
Iliacus- Flexion of hip- Upper 2/3 of illiac fossa
- Anterior sacroilliac ligament
- Iliolumbar ligament
- Lesser trochanter of femur- Muscular branch of femoral nerve (L1, L2, L3)- Lumbar branch of iliolumbar artery
Psoas minor- Weak flexion of lumbar vertebral column- Bodies of T12-L5 vertebrae
- Intervertebral discs between T12-L5
- Pectineal line of the pelvic brim - Anterior rami of L1- Lumbar branch of iliolumbar artery
Rectus femoris- Extends the knee- Straight head from anterior inferior iliac spine
- Reflected head from groove just above acetabulum
- Base of Patella (then joins Patella ligament to attach in tibial tuberosity)- Muscular branches of femoral nerve: L2, L3, L4- Lateral circumflex femoral artery
Sartorius- Flexion of hip
- Lateral rotation of hip
- Flexion of the knee
- anterior Superior iliac spine- Supero-medial tibia- femoral nerve: L2, L3, L4- femoral artery