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Perception Without Awareness What Cruel Acts of Fate Teach Us About Brain Function

e world around them without any conscious knowledge of that perception. Studies of disorders such as blindsight, inverse Antons Syndrome, prosapagnosia, and blind touch, provide us with an opportunity to understand the complex process of perception.Blindsight is a pattern of behavior that is displayed by individuals who are blind due to a damaged striate cortex. In cases of blindsight, the patient claims not to see something within their field of view, but shows in their behavior that they are stimulated by this object that they claim not to be seeing (Natsoulas, 1997). Individuals with blindsight, despite their blindness, were able to look towards a stimulus in their field of view, and point to it, but not identify it. In one study, a patient with complete cortical blindness was presented with a large moving striped display. The patient was able to follow this moving stimulus with his eyes, but claimed that he could not see it. Research into cases of blindsight have shown that the striate cortex plays an essential role in the conscious experience of visual perception (Cowey & Stoerig, 1991). Inverse Antons syndrome describes a condition in which patients who are esentially cortically blind, but do have small areas of visual capability in the middle of their visual field, deny the ability to see. This is the opposite of Antons syndrome, in which patients who are cortically blind deny their blindness (Hartman et al., 1991). In a case study of inverse Antons syndrome, a 56 year old male was diagnosed with blindness due to bilateral cerebral infarction. The patient stated that he had no visual ability, but he was able to navigate an unfamiliar area without assistance. He attended meetings of the Society for the Blind, but he never applied for services. In a visual examination, he reported that a test stimulus (a cloth) was moving. When asked how he detected the movement, he insisted that he felt it. A test was done in which words were fla...

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