Transient Ischemic Attack

A transient ischemic attack (spelled ischaemic in British English) (abbreviated as TIA, often referred to as mini stroke) is a transient episode of neurologic dysfunction caused by ischemia (loss of blood flow) – either focal brain, spinal cord or retinal – without acute infarction (tissue death). TIAs share the same underlying etiology (cause) as strokes: a disruption of cerebral blood flow (CBF). TIAs and strokes cause the same symptoms, such as contralateral paralysis (opposite side of body from affected brain hemisphere) or sudden weakness or numbness. A TIA may cause sudden dimming or loss of vision, aphasia, slurred speech and mental confusion. But unlike a stroke, the symptoms of a TIA can resolve within a few minutes or 24 hours. Brain injury may still occur in a TIA lasting only a few minutes. Having a TIA is a risk factor for eventually having a stroke or a silent stroke. A silent stroke or silent cerebral infarct (SCI) differs from a TIA in that there are no immediately observable symptoms. A SCI may still cause long lasting neurological dysfunction affecting such areas as mood, personality and cognition. A SCI often occurs before or after a TIA or major stroke.

A cerebral infarct that lasts longer than 24 hours but fewer than 72 hours is called a reversible ischemic neurologic deficit or RIND.

This text uses material from Wikipedia licensed under CC BY-SA

Latest Spotlight News

Cognitive skills differ across cultures and generations

An innovative study of children and parents in both Hong Kong and the United Kingdom, led by University of Cambridge researchers Michelle R. Ellefson and Claire Hughes, reveals cultural differences in important cognitive ...

Skin stem cells used to generate new brain cells

Using human skin cells, University of California, Irvine neurobiologists and their colleagues have created a method to generate one of the principle cell types of the brain called microglia, which play a key role in preserving ...