How is alexia caused

Alexia is an acquired deficit in the ability to interpret written language;In neuropsychology, a distinction is made between central alexia (commonly seen in aphasia) and peripheral alexia (a perceptual or attentional deficit).Alexia refers to a reading disorder caused by some form of acquired brain pathology, most commonly a stroke or tumor, in a previously literate subject.Also called optic alexia, sensory alexia, visual alexia, to differentiate from motor alexia (anarthria), in which there is loss of the power to read.Alexia with agraphia results from lesions of the left angular gyrus or the left posteroinferior temporal lobe.

While it's caused by damage to the brain, it can mistakenly appear to be associated with motor function or visual.Also called optic alexia, sensory alexia, visual alexia, to differentiate from motor alexia (anarthria), in which there is loss of the power to read aloud even though the significance of what is written or printed is understood.In japanese or korean persons, lesions of the latter cause alexia with agraphia for.Alexia without agraphia is a rare disorder that occurs after a posterior cerebral artery lesion of the dominant hemisphere with involvement of the splenium of the corpus collosum, characterized by the ability to write but inability to read.Loss of the ability to read or understand the written word, due either to brain damage that disconnects these functions or to temporary dysfunction caused by abnormal electrical or chemical activity in the brain.

The most common cause of alexia is a stroke (embolic or ischemic cerebral vascular accident) affecting the dominant cerebral hemisphere, although it may be caused by other etiologies resulting in a disruption to that area such as lesions, injury, or trauma.Pure alexia almost always involves an infarct to the left posterior cerebral artery (which perfuses the splenium of the corpus.The curious thing is that they can still walk, talk.