Anterior,medial compartment of thigh,adductor canal &obturator nerve Dr.N.Mugunthan
This document summarizes the muscles of the medial thigh compartment, the obturator nerve, and the adductor canal. It describes the origin, insertion, innervation and actions of the adductor muscles. It outlines the formation, branches and testing of the obturator nerve. It defines the adductor canal, identifies its boundaries, contents and its relevance to femoral artery ligation and popliteal artery aneurysm.
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Anterior,medial compartment of thigh,adductor canal &obturator nerve Dr.N.Mugunthan
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- 2. LEARNING OBJECTIVES Muscles ofmedial compartment of thigh Obturator nerve Adductor canal / Hunter’s canal / Subsartorial canal © Dr.N.Mugunthan
- 3. MUSCLES OF MEDIALCOMPARTMENT OF THIGH (ADDUCTOR) • Pectineus • Gracilis • Adductor brevis • Adductor longus • Adductor magnus Obturator externus © Dr.N.Mugunthan
- 4. Origin: • Body ofpubis & inferior pubic ramus Insertion: • Femur & tibia MUSCLES OF MEDIAL COMPARTMENT OF THIGH cont… © Dr.N.Mugunthan
- 5. MUSCLES OF MEDIALCOMPARTMENT OF THIGH cont… © Dr.N.Mugunthan
- 6. Adductor magnus: 2 parts 1.Hamstring part 2. Adductor part MUSCLES OF MEDIAL COMPARTMENT OF THIGH cont… © Dr.N.Mugunthan
- 7. Nerve supply: • Obturatornerve 1. Anterior division: • Pectineus • Gracilis • Adductor longus • Adductor brevis (if not by post.division) 2. Posterior division: • Obturator externus • Adductor brevis (if not by ant.division) • Adductor magnus (adductor part) MUSCLES OF MEDIAL COMPARTMENT OF THIGH cont… © Dr.N.Mugunthan
- 8. Actions: • Adduction ofthigh (hip) MUSCLES OF MEDIAL COMPARTMENT OF THIGH cont… © Dr.N.Mugunthan
- 9. Actions: • Gracilis (anti-rapeor custodian of virginity muscle) Hip joint: • Adduction Knee joint: • Flexion MUSCLES OF MEDIAL COMPARTMENT OF THIGH cont… © Dr.N.Mugunthan
- 10. Actions: • Adductor longus(Horse riding muscle) • Adduction of thigh • Rider’s bone –sesamoid bone in the tendon of adductor longus MUSCLES OF MEDIAL COMPARTMENT OF THIGH cont… © Dr.N.Mugunthan
- 11. Actions: • Adductor magnus •Adductor part – adduction of hip • Hamstring part – extension of hip MUSCLES OF MEDIAL COMPARTMENT OF THIGH cont… © Dr.N.Mugunthan
- 12. How to testthe muscle? • Ask the subject to adduct the thigh against resistance • Feel the adductors contraction MUSCLES OF MEDIAL COMPARTMENT OF THIGH cont… © Dr.N.Mugunthan
- 13. Applied anatomy • Groinpull (adductors pull) • Transplantation of gracilis (with blood vessels & nerves) • Rider’s strain ( strain of adductor longus) MUSCLES OF MEDIAL COMPARTMENT OF THIGH cont… © Dr.N.Mugunthan
- 14. OBTURATOR NERVE • Nerveof adductor compartment Formation: • Ventral divisions of anterior primary rami L2,L3 & L4 (Lumbar plexus) Course & relation: • Abdomen –medial margin of Psoas major • Pelvis – lateral wall of pelvis & enter to obturator canal • Thigh –divide into 2 branches © Dr.N.Mugunthan
- 15. Branches: • Adductor brevisdivides 1. Anterior division 2. Posterior division OBTURATOR NERVE cont… © Dr.N.Mugunthan
- 16. Anterior division: Muscular branches: •Pectineus • Gracilis • Adductor longus • Adductor brevis Articular branches: • Hip joint Cutaneous branches: • Branch to sartorial plexus with medial cut.nerve of thigh and saphenous nerve Vascular branches: • Femoral artery OBTURATOR NERVE cont… © Dr.N.Mugunthan
- 17. Posterior division: Muscular branches: •Obturator externus • Adductor brevis • Adductor magnus (adductor part) Articular branches: • Knee joint Vascular branch: • Popliteal artery OBTURATOR NERVE cont… © Dr.N.Mugunthan
- 18. How to testthe obturator nerve? • Test the adductors • Sensation test on the medial aspect of thigh OBTURATOR NERVE cont… © Dr.N.Mugunthan
- 19. OBTURATOR NERVE cont… Summary ©Dr.N.Mugunthan
- 20. ACCESSORY OBTURATOR NERVE •25 - 30% of subjects Formation/Root value: • Ventral divisions of anterior primary rami of L3 & L4 Course & relations: • Medial border of psoas major • Crosses sup.ramus of pubis © Dr.N.Mugunthan
- 21. Branches: Muscular branch: • Pectineus Articularbranch: • Hip joint Communicating branch: • With ant.division of obturator nerve ACCESSORY OBTURATOR NERVE cont… © Dr.N.Mugunthan
- 22. ADDUCTOR CANAL • Adductorcanal • Hunter’s canal • Subsartorial canal Definition: • Intermuscular space Situation: • Medial side of middle 1/3 of thigh Shape : • Triangular (cross section) Extent: • Apex of femoral triangle to adductor hiatus (5th osseoaponeurotic opening in adductor magnus) © Dr.N.Mugunthan
- 23. Presenting parts: Floor (posteriorwall ): • Adductor longus (upper) • Adductor magnus (lower) Anterolateral wall: • Vastus medialis Roof (medial wall ): • Fibrous membrane connecting ant.& post.wall • Overlapped by Sartorius Subsartorial plexus of nerves ADDUCTOR CANAL cont… © Dr.N.Mugunthan
- 24. Contents: 1. Femoral arteryand its descending genicular artery 2. Femoral vein 3. Saphenous nerve 4. Nerve to vastus medialis 5. Ant. & post. Division of obturator nerve ADDUCTOR CANAL cont… © Dr.N.Mugunthan
- 25. Applied anatomy: • Ligationof femoral artery (Hunter’s ligation) • Popliteal artery aneurysm ADDUCTOR CANAL cont… © Dr.N.Mugunthan
- 26. SUMMARY Muscles of medialcompartment of thigh Obturator nerve Adductor canal / Hunter’s canal / Subsartorial canal Applied anatomy © Dr.N.Mugunthan
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