Blindsight: A Case Study and Implications
The author and his collaborators were among the first to describe blindsight, the phenomenon in which patients who are blind due to damage to the neocortex can nevertheless discriminate certain types of visual events within their blind fields, even though they believe they are only guessing. This book gives a detailed account of the research conducted over ten years on an individual case of blindsight, together with a discussion of the historical and neurological background of the patient. It also reviews cases reported by other investigators and discusses the theoretical and practical issues and implications of this fascinating occurrence for psychologists, neuroscientists, and philosophers.
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Clinical history and early testing
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20 trials acuity Aimark perimeter ambient illumination animal apparatus artefact background Barbur blank blind field blindsight block cells cent correct chance Chapter clinical Cowey curved cycles/degree detection diameter duration eccentricity experience eye movements field defect fixation point flashed forced-choice form discrimination grating guessing hemifield high contrast horizontal meridian impaired field intact field lateral geniculate nucleus Latin square left field light level light value log ft lamberts log units lower left masking measured method midbrain monkey moving msec normal occipital lobe off-horizontal optic disc Pasik pathways patients Perenin performance perimeter arc perimetry peripheral possible presented procedure projected projector psychophysical rectangle region reported residual capacity residual function residual vision retina saccadic scored scotoma scotomata screen sensitivity spatial frequency square standard situation stimuli straight triangles stray light striate cortex superior colliculus Table tachistoscope task test quadrant Verbal commentaries vertical visual events visual field waves Zihl