Blood Supply of the Brain PDF

Blood supply of the Brain  Arterial supply - Brain derives from: 2 x ICA 2 x vertebral arteries Cour...

Blood supply of the Brain  Arterial supply - Brain derives from: 2 x ICA 2 x vertebral arteries Course: Course : 1st br of 1st part of subclavian a.  CCA  Tranverse foramina of C1-C6  carotid canal  f/men magnum  carvernous sinus (with 6th CN)  carotid groove. unites with basilar a. Branches: - Ant choroidal a. - PCoA - Opthalmic a. - PCA - ACA - MCA cerebral cortex - Brainstem, - Cerebellum  Middle cerebral Posterior artery Anterior cerebral communicating artery artery Internal carotid artery in cavernous sinus Posterior cerebral artery Internal carotid artery Basilar artery - Enter carotid canal External carotid artery Vertebral artery Common carotid artery Communication of PCA with ICA & its brs  CoW (Circle of Willis) Blood Supply of Cerebral cortex. cerebral cortex….lobes.. Central sulcus Parieto-occipital Frontal Parietal sulcus Occipital Temporal Lateral sulcus (of Sylvian) Regions in each lobes.. Frontal lobe Parietal lobe Temporal lobe Occipital lobe  Central sulcus Parieto-occipital sulcus Frontal Cingulate sulcus Parietal Occipital Temporal Calcarine sulcus Blood Supply of Cerebral cortex. Derives from ACA, MCA, PCA Blue regions - ACA, Red - MCA Arteries Area of arterial supply (blue regions) ACA Superior surface of - Superior frontal gyrus frontal & parietal lobes - Superior parietal lobule medial surface of - Medial frontal gyrus* frontal & parietal lobes - Paracentral lobule* - Cingulate gyrus* - Precuneus* Arterie Area of arterial supply (red regions) s MCA Most of lateral surface of - Middle frontal gyrus Frontal, parietal & temporal - Inf. frontal gyrus lobes. - Precentral / postcentral gyrus - Inf. parietal lobule - Super / middle temporal gyrus Arteries Area of arterial supply PCA occipital lobe & -cuneus -lingual gyrus Part of temporal lobes -Inf. temporal gyrus -uncus -Parahippocampal gyrus Anterior Cerebral Artery = 10 Branches Middle Cerebral Artery postrolandic Posterior Cerebral Artery = 7 Branches  When things go wrong From: Clinical Neurology and Neurosurgery, Lindsay & Bone , 4th Ed, Churchill Livingstone, 2004.  Cerebral Aneurysm: 3 Angiography (lateral view, left internal carotid angiogram shown) defined the lesion in preparation for definitive treatment. Blood Supply of Brainstem & Cerebellum. >> derives from brs of vertebral a. & basillar a. Branches of vertebral a. : Branches of basillar a: 1. Ant spinal a 1. PCA 2. Post spinal a 2. SCA 3. PICA 3. AICA 4. Pontine. 5. Labyrinthine  Blood Supply of Brainstem & Cerebellum. MIDBRAIN >> PCA PCA SCA PONS >> SCA, pontine, Pontine AICA AICA MO >> ALL BRS of VERTEBRAL a. PICA Ant (ant / post spinal a., spinal a PICA)  Blood Supply of Brainstem & Cerebellum. CEREBELLUM >> SCA, AICA, SCA PICA Cerebral veins Dural sinuses  Cerebral Veins Comprise of: Superficial cerebral vv. Deep cerebral vv. Empty into dural venous sinuses (e.g: SSS, ISS, cavernous ss, inferior + superior petrosal ss, tranverse ss, sigmois ss, straight (rectus) s, confluens of sinuses) Dural venous sinuses Dural venous sinuses  CEREBRAL VV SUPERCIAL DEEP Superior Middle Inferior - GCV * - Internal CV* - Basal V empty into the cavernous and transverse sinuses.  CEREBRAL VV SUPERCIAL DEEP drain : - deep white matter, Superior Middle Inferior - basal ganglia, - choroid plexus, - periventricular area, - diencephalon (hypothalamus , thalamus). - GCV * - Internal CV* - Basal V END