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Visual extinction arises from damage to the parietal lobe of the brain. This damage most frequently arises following a stroke or other infarction in that area – however, any traumatic event sufficient to cause widespread tissue damage in the area may cause sufficient harm.
Brain: Cerebral infarction is the ischemic kind of stroke due to a disturbance in the blood vessels supplying blood to the brain. It can be atherothrombotic or embolic. [9] Stroke caused by cerebral infarction should be distinguished from two other kinds of stroke: cerebral hemorrhage and subarachnoid hemorrhage. Cerebral infarctions vary in ...
Any kind of brain damage, such as stroke, brain tissue death, or tumors, can lead to neglect and cause unilateral damage to one side of the parietal lobe. Overall, a person with parietal brain damage still has intact visual fields. One way to reduce the effects of extinction is to use grouping of items.
Stroke affecting large portions of the brain can cause significant brain swelling with secondary brain injury in surrounding tissue. This phenomenon is mainly encountered in stroke affecting brain tissue dependent upon the middle cerebral artery for blood supply and is also called "malignant cerebral infarction" because it carries a dismal ...
Cerebral infarction, also known as an ischemic stroke, is the pathologic process that results in an area of necrotic tissue in the brain (cerebral infarct). [1] In mid to high income countries, a stroke is the main reason for disability among people and the 2nd cause of death. [2]
Distortion can be caused by the slightest compression of tissue and can provide difficulties in diagnosis. [ 2 ] [ 3 ] It may cause chromatin to be squeezed out of nuclei. [ 4 ] Inflammatory and tumor cells are most susceptible to crush artifacts.
Congenital heart defects may also cause brain ischemia due to the lack of appropriate artery formation and connection. People with congenital heart defects may also be prone to blood clots. [citation needed] Other pathological events that may result in brain ischemia include cardiorespiratory arrest, stroke, and severe irreversible brain damage.
While dubbed "silent" due to the immediate lack of classic stroke symptoms, SLIs can cause damage to the surrounding brain tissue and can affect various aspects of a person's mood, personality, and cognitive functioning. A SLI or any type of silent stroke places an individual at greater risk for future major stroke. [7] [8]