Mild stroke could cause brain damage
A recent study in the Journal of Neuroscience says that mild stroke – also called Transient Ischemic Attack – can trigger brain damage and cognitive impairment.
As reported by the Third Age (17/12), Transient Ischemic Attack (TIA) itself has stroke-like symptoms, but only lasts a few minutes.
A transient ischemic attack is a transient episode of neurologic dysfunction caused by ischemia (loss of blood flow) – either focal brain, spinal cordor retinal – without acute infarction (tissue death).
TIAs share the same underlying etiology (cause) as strokes: a disruption of cerebral blood flow(CBF), and are frequently referred to as mini-strokes.
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 (amaurosis fugax),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.
“According to our study, neurons damaged by Transient Ischemic Attack. Results of this analysis can be used to treat at least on the part of the neuron after suffering a mild stroke,” said lead researcher author of the study, Maiken Nedergaard of the University of Rochester.
Mild stroke had only recently started to be noticed by researchers. Because common imaging techniques such as MRI is usually not sensitive enough to detect injuries or damage from a mild stroke.
Mild stroke occurs when blood flow to the brain is blocked. Unlike acute stroke which has symptoms of numbness, blurred vision, and slurred speech, mild stroke often strikes without symptoms. But its impact on the brain is quite alarming.