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Stroke DictionaryA-E | F-J | K-O | P-S | T-Zfrontal lobe: Responsible for speech, emotion, behavior, movement, and planning. A stroke in the frontal lobe may leave a person unable to talk, or may affect behavior. For example, an affected person may experience emotional lability in the form of sudden mood swings and uncontrolled crying. global aphasia: The complete disruption of language skills. hemianopia: Damage to the brain's optical processing can cause hemianopia, an inability to process visual stimuli on one side of the visual field. Monocular blindness describes a more permanent form of hemianopia, where sight is permanently lost in one eye. hemiballism: A condition associated with stroke, where muscles on one side of the body experience involuntary and uncontrollable twitching. This movement is often sudden and violent in nature and is the result of injury to the opposite side of the brain. hemiparesis: Partial loss of movement on one side of the body. hemiplegia: Total loss of movement on one side of the body. hemorrhagic stroke: Caused by ruptured blood vessels in the brain. Blood escaping from the blood vessel damages surrounding tissue. Bleeding from the blood vessel also results in obstructed blood flow to other parts of the brain, causing damage similar to that caused by an ischemic stroke.
Horner's syndrome: Affects the muscles around the eye, causing symptoms such as ptosis and miosis.
hyperthermia: Also known as heat stroke or sunstroke, hyperthermia occurs when the body absorbs more heat than it can expel. The heat regulating mechanisms in the body shut down, resulting in body temperature climbing uncontrollably.
hypothermia: An experimental treatment that involves lowering the body temperature of a person who has suffered a stroke. The goal is to limit the size of the lesion, or area of damaged tissue, by protecting the brain tissue near the site of the stroke. Limiting tissue damage can lead to improved outcomes and quality of life for stroke victims. intracerebral hemorrhage: An intracerebral hemorrhage occurs when blood vessels bleed into surrounding brain tissue. In addition to damage caused by blood itself, ischemic damage may occur due to impaired blood flow. High blood pressure is usually the cause of intracerebral hemorrhage, although bleeding may also be caused by head injury. ischemic stroke: Caused by obstructed blood flow, often due to atherosclerosis, the same process that narrows arteries and causes heart disease.
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