ANTERIOR COMPARTMENT OF THIGH 

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OBJECTIVES:

Identify the muscles of the anterior compartment of thigh in terms of their origin, insertion, nerve supply and actions.

CONTENTS

• Muscles Of The Anterior Compartment Of Thigh
• Their Nerve Supply
• Actions
• Origin Insertion
• Summary

INTRODUCTION:

In order to make study easier, The Anatomy of thigh is studied in three compartments, namely Anterior, Posterior and Medial Compartmant Of Thigh. The discussion topic of this article is the Anterior Compartment Of Thigh.

MUSCLES:

• QUADRICEPS: The major muscle group present in the Anterior compartment of the thigh. Rectus Femoris, Vastus Lateralis, Vastus Medialis and Vastus Intermedius are the muscles forming this group.
• ILIOPSOAS: A small group muscle in the Anterior compartment of the thigh formed by muscles Iliacus, Psoas Major and Psoas Minor. They are termed as one because they share common tendon.
• PECTINEUS
• SARTORIUS

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NERVE SUPPLY

All the muscles of the Anterior compartment of thigh is innervated by Femoral Nerve (L2,L3 and L4) except Psoas Major & Minor, which are innervated by L1, l2 & L3 anterior rami. Femoral nerve the main nerve of lumbar plexuses formed by anterior rami of lumbar 2nd,3rd and 4th nerves.

MUSCLE ACTIONS:

• QUADRICEPS: Extension of leg at knee joint
• ILIOPSOAS: Flexes thigh at hip joint
• PECTINEUS: Flexion, Adduction & assist in medial rotation
• SARTORIUS: At Hip Joint – Flexion, Abduction & Lateral Rotation At Knee Joint – Flexion

ORIGIN AND INSERTION:

• QUADRICEPS: Rectus Femoris Originate from Anterior Inferior Iliac Spine, Vastus Lateralis Originate from greater trochanter & Lateral lip of Linea Aspera, Vastus Medialis Originate from intertrochanteric line & Medial lip of Linea Aspera, Vastus Intermedius Originate from Anterolateral surface of Femur shaft. All the four muscles insert in patella bone by sharing common tendon “Quadriceps Tendon”.
• ILIOPSOAS: Iliacus Muscle Originate from Iliac Crest & Iliac Fossa of Ilium Bone & Insert in Lesser Trochanter of femur. Psoas Major & Minor Orginate from Each side of Thoracic 12th till Lumbar 5 vertebrae & Insert in Lesser Trochanter Of Femur
• PECTINEUS: Originate from Pubis ( Superior Ramus) & Insert in Pectineal Line of Femur bone
• SARTORIUS: Originate from Anterior Superior Iliac Spine & Insert in Superior medial surface of Tibia bone

SUMMARY:

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