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Consciousness Lost and FoundA Neuropsychological Exploration$
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Lawrence Weiskrantz

Print publication date: 1999

Print ISBN-13: 9780198524588

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780198524588.001.0001

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Attributes and possible pathways of residual visual capacity

Attributes and possible pathways of residual visual capacity

(p.127) 6 Attributes and possible pathways of residual visual capacity
Consciousness Lost and Found

Lawrence Weiskrantz

Oxford University Press

In the absence of striate cortex, it is in no sense completely deprived of visual information, although it may be reduced quantitatively. This chapter examines how the residual information is processed qualitatively, and whether any particular pathways or their targets, or interactions with other targets or further projections, have a responsibility for any particular visual attribute. Further, this chapter explores whether the absence of striate cortex eliminates any particular attribute and, in particular, whether it eliminates visual awareness. A detailed assessment of the visual system is presented, including the retina, to relate various subtypes of residual capacity to the known or putative properties of specific subparts of the extra-striate visual pathways and cortical areas. Two questions are also addressed regarding the ‘blind’ aspect of blindsight by the chapter.

Keywords:   striate cortex, visual information, residual information, visual awareness, visual system, visual pathways, cortical areas

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