Blood Supply of the Brain PDF
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Uploaded by RegalOlive1328
Dr. Mariam Atef
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Summary
This document provides an overview of the blood supply to the brain, including information on the various arteries and their branches. It includes diagrams and descriptions of the different parts of the blood supply system, such as the Circle of Willis.
Full Transcript
Blood supply of the Brain By: Dr. Mariam Atef Lecturer of Anatomy Ends at the base of the brain into 2 terminal branches: Anterior cerebral artery Middle cerebral artery ICA : It ends at the base of the brain into 2 terminal branches:...
Blood supply of the Brain By: Dr. Mariam Atef Lecturer of Anatomy Ends at the base of the brain into 2 terminal branches: Anterior cerebral artery Middle cerebral artery ICA : It ends at the base of the brain into 2 terminal branches: Anterior cerebral artery Middle cerebral artery Rt and Lt vertebral arteries unite at the lower border of pons to form basilar artery which passes infront of the pons , at the upper border of pons it divides into 2 posterior cerebral arteries Vertebral artery Origin: it arises at the root of neck as a branch from the first part of subclavian artery Course: it has 4 parts The Fourth part: enters the cranial cavity through foramen magnum, ascends upwards and medially on the medulla to reach the lower border of the pons Termination: it ends at the lower border of pons where the 2 vertebral arteries unite to form the basilar artery Basilar artery Origin: begins at the lower border of pons by the union of the 2 vertebral arteries Course: ascends in the basilar groove of the pons Termination: at the upper border of pons by dividing into 2 posterior cerebral arteries. Internal Carotid Artery Origin: It is one of the 2 terminal branches of the common carotid artery opposite the upper border of thyroid cartilage Course : is divided into 4 parts Cervical part, Petrous part, cavernous part and supracavernous part Termination: it terminates on the lateral side of the optic chiasma just below the anterior perforated substance. by dividing into : Anterior cerebral (smaller) and Middle cerebral (Larger) arteries Circle of Willis It is the anastomoses between the branches of the 2 ICA and the basilar artery in the interpeduncular fossa at the base of the brain. 6 large arteries and 3 communicating arteries Posterior cerebral arteries MCQ’s
