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ADDUCTOR REGION
BY- DR. ELA KINRA
DEPARTMENT OF ANATOMY
ADDUCTOR COMPARTMENT
 IT IS WELL DEVELOPED
 ITS COUNTERPART IN THE ARM HAS
UNDERGONE DEGENERATION DURING
THE COURSE OF EVOLUTION
 REPRESENTED ONLY BY A WEAK
CORACOBRACHIALIS MUSCLE OF THE
FLEXOR COMPARTMENT OF THE ARM
BOUNDARIES
 ANTERIORLY- MEDIAL INTERMUSCULAR SEPTUM WHICH
SEPARATES IT FROM THE ANTERIOR (EXTENSOR) COMPARTMENT OF
THE THIGH
 POSTERIORLY- ILL-DEFINED POSTERIOR INTERMUSCULAR SEPTUM
WHICH SEPARATES IT FROM POSTERIOR (FLEXOR) COMPARTMENT
OF THE THIGH
 THE POSTERIOR INTERMUSCULAR SEPTUM IS ILL-DEFINED AND
INCOMPLETE DUE TO THE PRESENCE OF A COMPOSITE MUSCLE, THE
ADDUCTOR MAGNUS, CONSISTING OF TWO COMPONENTS
ADDUCTOR AND FLEXOR (HAMSTRING) BELONGING TO ADDUCTOR
AND FLEXOR COMPARTMENTS OF THE THIGH, RESPECTIVELY
CONTENTS
 MUSCLES: ADDUCTOR LONGUS, ADDUCTOR BREVIS, ADDUCTOR MAGNUS,
GRACILIS, PECTINEUS, AND OBTURATOR EXTERNUS.
 NERVE: OBTURATOR NERVE.
 ARTERIES: PROFUNDA FEMORIS ARTERY AND OBTURATOR ARTERY.
MUSCLES
 THE MUSCLES OF THE MEDIAL COMPARTMENT OF THE
THIGH ARE ARRANGED INTO THREE LAYERS.
 FROM SUPERFICIAL TO DEEP THESE ARE
1. ANTERIOR (FIRST) LAYER CONSISTS OF PECTINEUS,
ADDUCTOR LONGUS, AND GRACILIS.
2. MIDDLE (SECOND) LAYER CONSISTS OF ADDUCTOR
BREVIS.
3. POSTERIOR (THIRD) LAYER CONSISTS OF ADDUCTOR
MAGNUS.
adductorregionofthigh-210317164657 2.pptx
adductorregionofthigh-210317164657 2.pptx
adductorregionofthigh-210317164657 2.pptx
OBTURATOR NERVE
 CHIEF NERVE OF THE ADDUCTOR
COMPARTMENT OF THE THIGH
 ARISES FROM THE LUMBAR PLEXUS IN THE
ABDOMEN
 IT IS FORMED BY THE VENTRAL DIVISION OF
THE ANTERIOR PRIMARY RAMI OF L2, L3, L4
SPINAL NERVES
 IT ENTERS THE THIGH BY PASSING THROUGH
THE OBTURATOR CANAL
COURSE AND DISTRIBUTION
 WHILE PASSING THROUGH THE OBTURATOR CANAL THE OBTURATOR NERVE DIVIDES
INTO ANTERIOR AND POSTERIOR DIVISIONS
ANTERIOR DIVISION- PASSES DOWNWARDS INTO THE THIGH IN FRONT OF THE
OBTURATOR EXTERNUS
 THEN DESCENDS BEHIND THE PECTINEUS AND THE ADDUCTOR LONGUS, AND IN FRONT
OF THE ADDUCTOR BREVIS
 THE ANTERIOR DIVISION SUPPLIES THE FOLLOWING MUSCLES:
(a) PECTINEUS
(b) ADDUCTOR LONGUS
(c) GRACILIS
(d) ADDUCTOR BREVIS
 THE ANTERIOR DIVISION ALSO GIVES AN ARTICULAR TWIG TO THE HIP JOINT
 DISTAL TO THE ADDUCTOR LONGUS, IT ENTERS THE ADDUCTOR CANAL WHERE IT
PROVIDES A TWIG TO THE SUBSARTORIAL PLEXUS OF NERVES AND TERMINATES BY
SUPPLYING THE FEMORAL ARTERY IN THE ADDUCTOR CANAL
COURSE AND DISTRIBUTION
POSTERIOR DIVISION- ENTERS THE THIGH BY PIERCING THE ANTERIOR PART OF
THE OBTURATOR EXTERNUS MUSCLE WHICH IT SUPPLIES
 IT THEN DESCENDS BEHIND THE ADDUCTOR BREVIS AND IN FRONT OF THE
ADDUCTOR MAGNUS
 THE POSTERIOR DIVISION SUPPLIES THE FOLLOWING MUSCLES:
(a) OBTURATOR EXTERNUS
(b) ADDUCTOR MAGNUS
(c) ADDUCTOR BREVIS
 ITS TERMINAL PART FORMS AN ARTICULAR BRANCH CALLED GENICULAR
BRANCH
 WHICH PIERCES THE ADDUCTOR MAGNUS OR PASSES THROUGH HIATUS FOR
FEMORAL VESSELS TO REACH THE POPLITEAL FOSSA
 WHERE IT RUNS ALONG THE POPLITEAL VESSELS AND PIERCES THE OBLIQUE
POPLITEAL LIGAMENT TO SUPPLY THE KNEE JOINT
CLINICAL ANATOMY
 ADDUCTOR SPASM OF THE THIGH: SPASM OF THE ADDUCTORS OF THE THIGH IN
SPASTIC PARAPLEGIA MAY BE RELIEVED BY SURGICAL DIVISION OF THE
OBTURATOR NERVE.
 REFERRED PAIN: IN DISEASES OF THE KNEE JOINT, THE PAIN MAY BE REFERRED TO
THE HIP JOINT ALONG THE OBTURATOR NERVE (L2, L3, AND L4) BECAUSE IT
SUPPLIES BOTH THESE JOINTS.
PROFUNDA FEMORIS ARTERY
 LARGEST BRANCH OF THE FEMORAL ARTERY
 THE CHIEF SOURCE OF BLOOD SUPPLY TO THE MUSCLES OF ALL THE THREE COMPARTMENTS
OF THE THIGH
 IT ARISES FROM THE LATERAL SIDE OF THE FEMORAL ARTERY IN THE FEMORAL TRIANGLE
ABOUT 4 CM BELOW THE INGUINAL LIGAMENT
 BEHIND THE FEMORAL VESSELS, GIVING OFF MEDIAL AND LATERAL CIRCUMFLEX ARTERIES
 IT THEN PASSES POSTERIORLY BETWEEN PECTINEUS AND ADDUCTOR LONGUS THEN
DESCENDS CLOSE TO FEMUR SUCCESSIVELY BETWEEN ADDUCTOR LONGUS AND ADDUCTOR
BREVIS, BETWEEN ADDUCTOR LONGUS AND ADDUCTOR MAGNUS
 HERE IT GIVES OFF FIRST THREE PERFORATING ARTERIES
 ITS TERMINAL PART PIERCES THE ADDUCTOR MAGNUS AS THE FOURTH PERFORATING
BRANCHES
1. MUSCULAR BRANCHES
2. MEDIAL CIRCUMFLEX
FEMORAL ARTERY
3. LATERAL CIRCUMFLEX
FEMORAL ARTERY
4. FOUR PERFORATING
ARTERIES.
OBTURATOR ARTERY
 IT ARISES FROM THE ANTERIOR DIVISION OF INTERNAL ILIAC ARTERY IN
THE PELVIS
 IT ENTERS THE ADDUCTOR COMPARTMENT OF THE THIGH THROUGH THE
OBTURATOR CANAL
 JUST OUTSIDE THE OBTURATOR CANAL
 IT DIVIDES INTO MEDIAL AND LATERAL BRANCHES
 THE LATERAL BRANCH GIVES OFF AN ACETABULAR TWIG
 WHICH ENTERS THE ACETABULUM THROUGH A GAP BETWEEN
ACETABULAR NOTCH AND TRANSVERSE ACETABULAR LIGAMENT
 WHERE IT SUPPLIES ACETABULAR FAT AND GIVES OFF A SLENDER ARTERY
TO THE FEMORAL HEAD ALONG THE LIGAMENT OF THE HEAD OF FEMUR.
adductorregionofthigh-210317164657 2.pptx

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adductorregionofthigh-210317164657 2.pptx

  • 1. ADDUCTOR REGION BY- DR. ELA KINRA DEPARTMENT OF ANATOMY
  • 2. ADDUCTOR COMPARTMENT IT IS WELL DEVELOPED ITS COUNTERPART IN THE ARM HAS UNDERGONE DEGENERATION DURING THE COURSE OF EVOLUTION REPRESENTED ONLY BY A WEAK CORACOBRACHIALIS MUSCLE OF THE FLEXOR COMPARTMENT OF THE ARM
  • 3. BOUNDARIES ANTERIORLY- MEDIAL INTERMUSCULAR SEPTUM WHICH SEPARATES IT FROM THE ANTERIOR (EXTENSOR) COMPARTMENT OF THE THIGH POSTERIORLY- ILL-DEFINED POSTERIOR INTERMUSCULAR SEPTUM WHICH SEPARATES IT FROM POSTERIOR (FLEXOR) COMPARTMENT OF THE THIGH THE POSTERIOR INTERMUSCULAR SEPTUM IS ILL-DEFINED AND INCOMPLETE DUE TO THE PRESENCE OF A COMPOSITE MUSCLE, THE ADDUCTOR MAGNUS, CONSISTING OF TWO COMPONENTS ADDUCTOR AND FLEXOR (HAMSTRING) BELONGING TO ADDUCTOR AND FLEXOR COMPARTMENTS OF THE THIGH, RESPECTIVELY
  • 4. CONTENTS MUSCLES: ADDUCTOR LONGUS, ADDUCTOR BREVIS, ADDUCTOR MAGNUS, GRACILIS, PECTINEUS, AND OBTURATOR EXTERNUS. NERVE: OBTURATOR NERVE. ARTERIES: PROFUNDA FEMORIS ARTERY AND OBTURATOR ARTERY.
  • 5. MUSCLES THE MUSCLES OF THE MEDIAL COMPARTMENT OF THE THIGH ARE ARRANGED INTO THREE LAYERS. FROM SUPERFICIAL TO DEEP THESE ARE 1. ANTERIOR (FIRST) LAYER CONSISTS OF PECTINEUS, ADDUCTOR LONGUS, AND GRACILIS. 2. MIDDLE (SECOND) LAYER CONSISTS OF ADDUCTOR BREVIS. 3. POSTERIOR (THIRD) LAYER CONSISTS OF ADDUCTOR MAGNUS.
  • 9. OBTURATOR NERVE CHIEF NERVE OF THE ADDUCTOR COMPARTMENT OF THE THIGH ARISES FROM THE LUMBAR PLEXUS IN THE ABDOMEN IT IS FORMED BY THE VENTRAL DIVISION OF THE ANTERIOR PRIMARY RAMI OF L2, L3, L4 SPINAL NERVES IT ENTERS THE THIGH BY PASSING THROUGH THE OBTURATOR CANAL
  • 10. COURSE AND DISTRIBUTION WHILE PASSING THROUGH THE OBTURATOR CANAL THE OBTURATOR NERVE DIVIDES INTO ANTERIOR AND POSTERIOR DIVISIONS ANTERIOR DIVISION- PASSES DOWNWARDS INTO THE THIGH IN FRONT OF THE OBTURATOR EXTERNUS THEN DESCENDS BEHIND THE PECTINEUS AND THE ADDUCTOR LONGUS, AND IN FRONT OF THE ADDUCTOR BREVIS THE ANTERIOR DIVISION SUPPLIES THE FOLLOWING MUSCLES: (a) PECTINEUS (b) ADDUCTOR LONGUS (c) GRACILIS (d) ADDUCTOR BREVIS THE ANTERIOR DIVISION ALSO GIVES AN ARTICULAR TWIG TO THE HIP JOINT DISTAL TO THE ADDUCTOR LONGUS, IT ENTERS THE ADDUCTOR CANAL WHERE IT PROVIDES A TWIG TO THE SUBSARTORIAL PLEXUS OF NERVES AND TERMINATES BY SUPPLYING THE FEMORAL ARTERY IN THE ADDUCTOR CANAL
  • 11. COURSE AND DISTRIBUTION POSTERIOR DIVISION- ENTERS THE THIGH BY PIERCING THE ANTERIOR PART OF THE OBTURATOR EXTERNUS MUSCLE WHICH IT SUPPLIES IT THEN DESCENDS BEHIND THE ADDUCTOR BREVIS AND IN FRONT OF THE ADDUCTOR MAGNUS THE POSTERIOR DIVISION SUPPLIES THE FOLLOWING MUSCLES: (a) OBTURATOR EXTERNUS (b) ADDUCTOR MAGNUS (c) ADDUCTOR BREVIS ITS TERMINAL PART FORMS AN ARTICULAR BRANCH CALLED GENICULAR BRANCH WHICH PIERCES THE ADDUCTOR MAGNUS OR PASSES THROUGH HIATUS FOR FEMORAL VESSELS TO REACH THE POPLITEAL FOSSA WHERE IT RUNS ALONG THE POPLITEAL VESSELS AND PIERCES THE OBLIQUE POPLITEAL LIGAMENT TO SUPPLY THE KNEE JOINT
  • 12. CLINICAL ANATOMY ADDUCTOR SPASM OF THE THIGH: SPASM OF THE ADDUCTORS OF THE THIGH IN SPASTIC PARAPLEGIA MAY BE RELIEVED BY SURGICAL DIVISION OF THE OBTURATOR NERVE. REFERRED PAIN: IN DISEASES OF THE KNEE JOINT, THE PAIN MAY BE REFERRED TO THE HIP JOINT ALONG THE OBTURATOR NERVE (L2, L3, AND L4) BECAUSE IT SUPPLIES BOTH THESE JOINTS.
  • 13. PROFUNDA FEMORIS ARTERY LARGEST BRANCH OF THE FEMORAL ARTERY THE CHIEF SOURCE OF BLOOD SUPPLY TO THE MUSCLES OF ALL THE THREE COMPARTMENTS OF THE THIGH IT ARISES FROM THE LATERAL SIDE OF THE FEMORAL ARTERY IN THE FEMORAL TRIANGLE ABOUT 4 CM BELOW THE INGUINAL LIGAMENT BEHIND THE FEMORAL VESSELS, GIVING OFF MEDIAL AND LATERAL CIRCUMFLEX ARTERIES IT THEN PASSES POSTERIORLY BETWEEN PECTINEUS AND ADDUCTOR LONGUS THEN DESCENDS CLOSE TO FEMUR SUCCESSIVELY BETWEEN ADDUCTOR LONGUS AND ADDUCTOR BREVIS, BETWEEN ADDUCTOR LONGUS AND ADDUCTOR MAGNUS HERE IT GIVES OFF FIRST THREE PERFORATING ARTERIES ITS TERMINAL PART PIERCES THE ADDUCTOR MAGNUS AS THE FOURTH PERFORATING
  • 14. BRANCHES 1. MUSCULAR BRANCHES 2. MEDIAL CIRCUMFLEX FEMORAL ARTERY 3. LATERAL CIRCUMFLEX FEMORAL ARTERY 4. FOUR PERFORATING ARTERIES.
  • 15. OBTURATOR ARTERY IT ARISES FROM THE ANTERIOR DIVISION OF INTERNAL ILIAC ARTERY IN THE PELVIS IT ENTERS THE ADDUCTOR COMPARTMENT OF THE THIGH THROUGH THE OBTURATOR CANAL JUST OUTSIDE THE OBTURATOR CANAL IT DIVIDES INTO MEDIAL AND LATERAL BRANCHES THE LATERAL BRANCH GIVES OFF AN ACETABULAR TWIG WHICH ENTERS THE ACETABULUM THROUGH A GAP BETWEEN ACETABULAR NOTCH AND TRANSVERSE ACETABULAR LIGAMENT WHERE IT SUPPLIES ACETABULAR FAT AND GIVES OFF A SLENDER ARTERY TO THE FEMORAL HEAD ALONG THE LIGAMENT OF THE HEAD OF FEMUR.