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Brain ischemia is a condition in which there is insufficient bloodflow to the brain to meet metabolic demand. [ 1] This leads to poor oxygen supply or cerebral hypoxia and thus leads to the death of brain tissue or cerebral infarction / ischemic stroke. [ 2] It is a sub-type of stroke along with subarachnoid hemorrhage and intracerebral hemorrhage.
Specialty. Psychiatry, neurology. Amnesia. Amnesia is a deficit in memory caused by brain damage or brain diseases, [ 1] but it can also be temporarily caused by the use of various sedative and hypnotic drugs. The memory can be either wholly or partially lost due to the extent of damage that is caused. [ 2]
Vascular dementia is dementia caused by a series of strokes. [ 2][ 4] Restricted blood flow due to strokes reduces oxygen and glucose delivery to the brain, causing cell injury and neurological deficits in the affected region. [ 6] Subtypes of vascular dementia include subcortical vascular dementia, multi-infarct dementia, stroke-related ...
Anterograde amnesia. Specialty. Neurology. In neurology, anterograde amnesia is the inability to create new memories after an event that caused amnesia, leading to a partial or complete inability to recall the recent past, while long-term memories from before the event remain intact. This is in contrast to retrograde amnesia, where memories ...
TIAs share the same underlying etiology as strokes; a disruption of cerebral blood flow. TIAs and strokes present with 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 ...
In aphasia (sometimes called dysphasia ), [ a] a person may be unable to comprehend or unable to formulate language because of damage to specific brain regions. [ 2] The major causes are stroke and head trauma; prevalence is hard to determine, but aphasia due to stroke is estimated to be 0.1–0.4% in the Global North. [ 3]
Vascular thalamic amnesia. Vascular thalamic amnesia occurs when the thalamus is affected by Korsakoff's syndrome or damaged by lacunar infarcts or hemorrhages. [1] Another common cause for damage to the thalamus that may contribute to the development of amnesia is a stroke. [2] It involves a loss of memory and a shift in behaviors and ...
In neurology, retrograde amnesia ( RA) is the inability to access memories or information from before an injury or disease occurred. [ 1] RA differs from a similar condition called anterograde amnesia (AA), which is the inability to form new memories following injury or disease onset. [ 2] Although an individual can have both RA and AA at the ...