How Many Types Of Visual Agnosia Are There?

Visual agnosia is the inability to blemish objects or faces, despite heart processes working correctly in a tolerant. It is non due(p) to problems caused by age, public lecture to or mental deterioration, but is unremarkably caused by metamorphose to the area below the occipital gussy up in the brain, and to the areas bordering the occipital region such as the parietal area, which are answerable for projection in vision. (Gleitman, Fridlund & Reisberg 2001: 29¬) Neuropsychologists principally distinguish ocular agnosias as either associative agnosias or apperceptive agnosias, impairment created by Lissauer (1890). Associative agnosia, according to Lissauer, occurs when a person cannot differentiate an object or face, but appears to mother fully in operation(p) opthalmic perception. Apperceptive agnosia is characterised by a diligent with shamed visual perception, and therefore they are futile to see objects or faces correctly, and so leads to a lack of recogni tion. (Farah 2004: 4)This undertake will research apperceptive and associative agnosias using human face studies, as well as defining other poor son types of visual agnosias, and finally determining how many forms of agnosia exist. Associative visual agnosia can be defined by Rubens and Bensons 1971 patient study into a middle ages man who had brain impairment due to a sharp blood pressure drop.

Whilst linguistic process and most mental abilities had not been damaged, he seemed unable to jazz almost all visually presented objects. The patient, however, could identify the object by and by touching it, and co uld name geometrical forms such as squares a! nd circles. He was diagnosed with associative visual agnosia, as while he could not identify a visual object, he was tranquillise sure-footed of drawing them very well. He was able to recognise dispirited details in drawings, such as complex nonobjective patterns, ad how these patterns differed. His inability to recognise objects was caused by a lesion in the left hemisphere, on the surface of the brain below the occipital bone, and also...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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