These results came as a surprise to the subjects who would often insist they were simply 'guessing.' This phenomenon is known as blindsight
. Below we describe two of the classic case studies.
is a phenomenon in which patients who are cortically blind can respond to visual stimuli that they do not consciously see.
Consciousness of the first order in blindsight
. Proceedings of the National Academy of Sciences of the United States of America --PNAS, 107(49), 21217-21222.
Unconscious vision: New insight into the neuronal correlate of blindsight
using diffusion tractography.
Each chapter describes a unique perceptual phenomenon: attention; automatic mechanisms, including aftereffects for color, motion, and tilt; singularity and multiplicity; forced seeing; looking without seeing; damage to brains, including visual agnosias and deficits such as scotomas, blindsight
, and problems in allocating attention correctly, as in neglect, extinction, and Balint's syndrome; and evolutionary influences.
In agreement with this interpretation, a recent fMRI study in monkeys demonstrates that direct LGN projections to the extrastriate cortex have a critical functional contribution to blindsight
with V1 lesions ; a human study shows a direct anatomical connection between the thalamus and the hMT+ complex, that would directly convey motion information to the hMT+, thereby bypassing the V1 .
We're looking inward now, not because we've grown small and timid, but because at long last we have the tools to look inward; and we see multitudes there."--Peter Watts, author of Starfish, Maelstrom, Behemoth, and Blindsight
Some of these choices will surely be read a century from now--assuming anything is--but others are already forgotten, and the best sf novel of 2006, Peter Watts's astonishing Blindsight
, isn't represented.
En fenomenos como la vision ciega o blindsight
, al estar danada la via comun que permite la experiencia visual , resulta extrana la presencia en algunas personas de reactividad respecto a estimulos, lo que permite concluir la existencia de vias distintas de asociacion visual, que permiten, en un grado mayor o menor, la conciencia de estimulos externos, en ausencia de experiencias visuales complejas.
Anne Bloom and Paul Steven Miller, Blindsight
: How Te See Disabilities in Tort Litigation, 86 WASH.
For instance, an interesting study by Dutch psychologists indicates that when no relevant conscious knowledge is available, a person's behavior is sensitive to unconsciously registered emotion (as in so-called "affective blindsight
1974 yilindaki bu olgu ile "kor gorme" ("blindsight
") ilk defa bilimsel olarak tanimlanmistir.