He also mentioned that these symptoms could be caused by a blockage of one of the main arteries that supply blood to the brain. From postmortem studies, he provided information on the carotid and vertebral arteries that supply the brain with blood.
He noted that these symptoms might stem from a blockage in one of the primary vessels responsible for supplying blood to the brain. Autopsy studies provided insight into the carotid and vertebral arteries' functions in delivering oxygenated blood to the brain.