Embolism
Embolism is the sudden blockage of an artery by a blood clot (thrombus) or other material that has been brought to the site by blood flow. Embolism in the brain is a common cause of stroke.
Further Reading:
Article : "VASCULAR DEMENTIA"
by Catherine E. Myers. Copyright © 2006 Memory Loss and the Brain - Artwork copyright © 2000 Ann L. Myers