The cerebrum is the largest part of the brain. It is made of a left and a right section. The left side of the brain is in charge of the right side of the body. In most people, it is also controls the ability to speak, or use language.
A left brain stroke happens when the blood supply to the left side of the brain is interrupted. Blood brings oxygen and nutrients to brain tissue. When blood flow is stopped, the brain tissue quickly dies.
An ischemic stroke is caused by a blockage of blood flow, which may be due to:
A clot from another part of the body like the heart or neck. The clot breaks off and flows through the blood until it becomes trapped in a blood vessel supplying the brain.
A clot that forms in an artery that supplies blood to the brain.
A tear in an artery supplying blood to the brain—arterial dissection.
A hemorrhagic stroke is caused by a burst blood vessel. Blood spills out of the broken blood vessel and pools in the brain. This interrupts the flow of blood and causes a build up of pressure on the brain.
Symptoms occur suddenly. Exact symptoms will depend on the part of the brain affected. Rapid treatment is important to decrease the amount of brain damage. Brain tissue without blood flow dies quickly.
Call for emergency medical help
right away if you notice any of the following:
Sudden weakness or numbness of face, arm, or leg, especially on the right side of the body
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Furie KL, Kasner SE, Adams RJ, et al. Guidelines for the prevention of stroke in patients with stroke or transient ischemic attack: a guideline for healthcare professionals from the American Heart Association/American Stroke Association.
Hemorrhagic stroke. National Stroke Association website. Available at: ...(Click grey area to select URL) Accessed November 8, 2018.
Hemorrhagic strokes (bleeds). American Stroke Association website. Available at: ...(Click grey area to select URL) Updated April 26, 2017. Accessed November 8, 2018.
6/2/2014 DynaMed's Systematic Literature Surveillance
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