Lower Limb 3 Front of Thigh Part I Cutaneous Nerve Supply of The Front of The Thigh (Anterolateral and Anteromedial Sides) 1- Femoral Branch of Genitofemoral Nerve (L1-L2) 2- Lateral Cutaneous Nerve of The Thigh (L2-L3) Posterior Branch Anterior Branch 4- Ilioinguinal Nerve (L1) 5- Cutaneous Branch of Obturator Nerve 3- Intermediate Cutaneous Nerve of The Thigh (L2-L3) (L2-L3) Lateral Branch Medial Branch 6- Medial Cutaneous Nerve of The Thigh (L2-L3) 7- Infrapatellar Branch of Saphenous Nerve Muscles of The Front of The Thigh 1- Sartorius (Origin, Course, Insertion and Nerve Supply) Anterior Superior Iliac Spine Sartorius Muscle Upper Part of Medial Side of the Tibia Action of Sartorius 1- On The Hip Joint Abduction of The Hip Flexion of The Hip Sartorius 2- On The Knee Joint Flexion of The Knee Medial Rotation of The Tibia When The Knee is Flexed 2- Quadriceps Muscle A- Rectus Femoris D- Vastus Intermedius B- Vastus Lateralis C- Vastus Medialis A- Rectus Femoris Origin, Insertion and Nerve Supply Straight Head (Originates from the Anterior inferior iliac spine) Reflected Head (Originates from the impression above acetabulum) Rectus Femoris Common Tendon B- Vastus Lateralis Origin, Insertion and Nerve Supply Vastus Lateralis 1- Upper part of Itertrochanteric Line 3- Lateral Margin of 2- Root of Gluteal Tuberosity Greater Trochanter 4- Lateral Lip of Linea Aspra Common Tendon C- Vastus Medialis Origin, Insertion and Nerve Supply 1- Lower part of Itertrochanteric Line 2- Spiral Line 3- Medial Lip of Linea Aspra Vastus Medialis 4- Medial Supracondylar Line Common Tendon D- Vastus Intermedius Origin, Insertion and Nerve Supply Vastus Intermedius It Originates from The Upper ¾ of The Anterior and Lateral Surfaces of The Shaft of The Femur Insertion of The Quadriceps Muscle Quadriceps Femoris Tendon Lateral Patellar Retinaculum Medial Patellar Retinaculum Patella Ligamentum Patellae Tibial Tuberosity Action of Quadriceps Muscle 2- Helps Flexion of The Hip By The Rectus Femoris 1- The Chief Extensor of The Knee 3- Keeps Patella in Position 3- Articularis Genu Muscle .