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2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
2 brain stem akd
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2 brain stem akd

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  • 1. BRAINSTEM DR ANIL
  • 2. GROSS ANATOMY OF THE BRAINSTEM
  • 3. THE MEDULLA: GROSS ANATOMY
  • 4. INTERNAL STRUCTURE OF THE MEDULLA
  • 5. THE PONS GROSS ANATOMY
  • 6. PONS - L. – a bridge
  • 7. INTERNAL STRUCTURE OF THE PONS
  • 8. THE MIDBRAIN GROSS ANATOMY
  • 9. INTERNAL STRUCTURE OF THE MIDBRAIN
  • 10. BLOOD SUPPLY OF BRAINSTEM
  • 11. BLOOD SUPPLY• MEDULLA1. 2 VERTEBRAL A2. ANT &POST SPINAL A3. ANT &POST INF CEREBELLAR A4. BASILAR A
  • 12. PONS• PONTINE BRANCHES OF BASILAR A• ANT INF CEREBELLAR A
  • 13. MIDBRAIN• BASILAR A-DIRECT BRS• POST CEREBRAL A• SUP CEREBELLAR A• BRS OF POST COMM &ANT CHOROIDAL A
  • 14. Syndromes
  • 15. Wallenberg Syndrome• aka lat medullary syndrome• occ. of PICA• Posterolat part of medulla is damaged• Features: a) Inv of spinal nuc & tract of V nerve - ipsilateral loss of pain & temp from face & forehead b) Inv of spinal lemniscus (lat spinothalamic tract) – -contralateral loss of pain & temp from body below face
  • 16. c) Inv of nuc. Ambiguus – - paralysis of muscles of softpalate, pharynx & larynx- - dysarthria & dysphagiad) Inv of Vestibular nuclei - -giddinessThis combination of sensory loss –“Crossed Hemianaesthesia”
  • 17. Medial Medullary SyndromeDejerine’s ant bulbar syndrom.b/c vertebral a  Click to edit theXII nerve – i/l paralysis & outline text format atrophy of 1/2 tongue ; deviated to affected side  Second OutlinePyramid c/l hemiplegia/ Level paralysis arm & leg.medial lemniscus (post column − Third Outline fibres) - contralateral loss of Level position & vibra.  FourthThis combination of motor loss – Crossed motor paralysis Outline Level
  • 18. Millard-Gublar synd• Lesion in lower part of Pons• Incl pyramidal tract• Also inv 6 & 7 nerve fibers• Abd n. i/l med squint• Facial n i/l facial palsy• Corticospinal tract c/l hemiplegia
  • 19. Pontine H’age• Pontine arteries rupture• Hyperpyrexia – thermoregulatory mech. disrupted• Pinpoint pupils – contraction of sphincter pupillae muscle• Coma – reticular formation lesion• Contralateral UMN paralysis – pyramidal fibres involved
  • 20. Webers Syndrome• Ipsilateral oculomotor  Click to edit the palsy. outline text format• Contralateral hemiplegia  Second Outline Level − Third Outline Level  Fourth Outline Level
  • 21. Benedikts syndrome• Fibres of III nerve.  Click to edit the outline text format• Descending motor fibres in cerebral  Second Outline peduncle. Level• Red nucleus and nearby − Third Outline cerebellothalamic Level fibres.  Fourth Outline Level

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