Q: Describe the blood supply of cerebrum please keep it in short point twice only A: Blood Supply of Cerebrum --- 1. Arterial Supply - Cerebrum is supplied by 3 pairs of cerebral arteries: Anterior ACA, Middle MCA, and Posterior PCA - Branching pattern: Each artery gives cortical, central, and choroidal branches - Cortical branches → supply outer cortex; pierce at right angles → become end arteries - Central branches → supply corpus striatum & internal capsule e.g., lateral striate arteries - Choroidal branches → form choroid plexuses anterior choroidal from ICA; posterior choroidal from PCA --- 2. Surface-wise Distribution Surface Main Supply ------ Superolateral MCA 2/3; ACA strip along superomedial border; PCA temporal & occipital strip Medial ACA 2/3; MCA temporal pole; PCA occipital lobe/visual cortex Inferior PCA most; MCA orbital surface of frontal & temporal pole; ACA medial orbital surface NB: Superolateral → MCA; Medial → ACA; Inferior → PCA dominant rule --- Clinical note: MCA is most commonly occluded direct continuation of ICA → contralateral hemiplegia/hemianaesthesia face & arm leg ± aphasia dominant hemisphere. Q: Arterial supply to different surfaces of cerebral hemisphere under that part referred the textbook and just the hearing and points like that simple A: Arterial Supply to Different Surfaces of Cerebral Hemisphere Ref: Textbook of Anatomy – Head, Neck and Brain, Chapter 29 --- A. Superolateral Surface 1. MCA – most of superolateral surface 2/3 2. ACA – narrow strip along superomedial border 3. PCA – narrow strip along lower temporal & occipital lobe --- B. Medial Surface 1. ACA – most of medial surface anterior 2/3 2. MCA – temporal pole 3. PCA – occipital lobe visual cortex --- C. Inferior Surface 1. PCA – most of inferior surface except temporal pole 2. MCA – lateral orbital surface of frontal lobe + temporal pole 3. ACA – medial part of orbital surface of frontal lobe --- NB: - Superolateral → MCA mostly - Medial → ACA mostly - Inferior → PCA mostly Q: Name the branches of circle of willis A: Branches of Circle of Willis --- Forming Vessels Components 1. Anterior communicating artery ACoA — 1 2. Anterior cerebral artery ACA — paired 3. Internal carotid artery ICA — paired 4. Posterior communicating artery PCoA — paired 5. Posterior cerebral artery PCA — paired --- Branches Given Off From ACA: - Anterior communicating artery - Medial striate artery recurrent artery of Heubner From ICA: - Anterior cerebral artery - Middle cerebral artery - Posterior communicating artery - Anterior choroidal artery From Basilar artery just before forming circle: - Posterior cerebral artery PCA — terminal branch --- Simple Memory Aid "2 ACAs + 2 PCAs + 2 PComs + 1 ACom + 2 ICAs" = 9 vessels form the circle --- NB: The circle of Willis lies in the interpeduncular cistern and surrounds the optic chiasma, tuber cinereum, and mammillary bodies.
