Blood Supply of the Brain and Meninges final (1).pptx

prepared this for a seminar on blood supply of brain and meninges

1. BLOOD SUPPLY OF BRAIN AND MENINGES

2. Brain perfusion Grey matter receives 80-100 ml/100g/minut e White matter receives 20-30 ml/100g/minute Average blood supply of brain: 750-900ml/minute Brain represents only 2% of total body weight y et requires 15 - 20% of cardiac output due to high metabolic demand

3. Arterial supply Anterior circulation internal carotid arteries Posterior circulation Vertebrobasilary system

4. Posterior circulation Vertebral arteries Basilar artery Posterior cerebral artery Posterior inferior cerebellar artery (PICA) Anterior inferior cerebellar artery(AICA) Superior cerebellar artery

5. Posterior inferior cerebellar artery Wallenberg syndrome (Lateral medullary syndrome ): Ipsilateral face sensory los Contralateral body pain / temp loss Vertigo Ataxia Dysphagia, Hoarnseness Horner’s syndrome Palatal weakness

6. P1 Thalamoperforating arteries Para median midbrain perforators Weber syndrome Claude’s syndrome Posterior cerebral artery -segments

7. P2 Thalamogeniculate arteries Peduncular perforators Posterior choroidal arteries Thalamic pain syndrome Hemisensory syndrome Visual attention deficit Memory impairment Posterior cerebral artery -segments

8. P3& P4 Parieto –occipital artery Posterior temporal branches Occipitotemporal branches Calcarine artery Splenial branches Homonymous hemianopia (macular sparing ) Anton’s syndrome Alexia without agraphia (left P4) Prospognosia (right P4) Posterior cerebral artery -segments

9. Anterior circulation Anterior cerebral artery Middle cerebral artery

10. Middle cerebral artery segments M1 Horizontal/sphenoidal M2 insular M3 Opercular M4 Cortical

11. Middle cerebral artery M1: Lenticulostriate arteries(deep perforators) Lacunar strokes , Pure motor stroke Anterior temporal artery

12. M2– Insular segment Superior division -frontal and parietal operculum Inferior division- temporal operculum M3 – opercular segment Opercular part of frontal lobe Parietal lobe Temporal lobe

13. M4 segment Frontal lobe Orbitofrontal artery Prefrontal branches Precentral ( Rolandic) artery Parietal lobe Post central artery Angular artery supramarginal artery Temporal lobe

14. Cerebral Hemisphere

15. Venous drainage of brain Superficial cerebral veins: Superior cerebral veins -Superior Sagittal Sinus Inferior cerebral veins -Transverse sinus Superficial middle cerebral veins -cavernous sinus

16. Deep cerebral veins: Internal cerebral veins -great vein of galen Basal vein of rosenthal-great vein Great cerebral vein -straight sinus

17. Blood supply of meninges

18. Thank you!