Brain-Stimulation Induced Blindsight: Unconscious Vision or Response Bias?
نویسندگان
چکیده
منابع مشابه
Brain-Stimulation Induced Blindsight: Unconscious Vision or Response Bias?
A dissociation between visual awareness and visual discrimination is referred to as "blindsight". Blindsight results from loss of function of the primary visual cortex (V1) which can occur due to cerebrovascular accidents (i.e. stroke-related lesions). There are also numerous reports of similar, though reversible, effects on vision induced by transcranial Magnetic Stimulation (TMS) to early vis...
متن کاملExtrageniculate mediation of unconscious vision in transcranial magnetic stimulation-induced blindsight.
The proposed neural mechanisms supporting blindsight, the above-chance performance of cortically blind patients on forced-choice visual discrimination tasks, are controversial. In this article, we show that although subjects were unable to perceive foveally presented visual stimuli when transcranial magnetic stimulation over the visual cortex induced a scotoma, responses nonetheless were delaye...
متن کاملBlindsight: A conscious route to unconscious vision
One way to study how the brain works is to look at the behaviour of individuals who have been unlucky enough to have suffered brain damage. This neuropsychological approach to the study of brain function has a long history, dating back to at least the early part of the last century. Even today, at a time when neuroscience has become increasingly dominated by molecular biology at one end of the ...
متن کاملRepression of unconscious information by conscious processing: evidence from affective blindsight induced by transcranial magnetic stimulation.
Some patients with a lesion to the primary visual cortex (V1) show "blindsight": the remarkable ability to guess correctly about attributes of stimuli presented to the blind hemifield. Here, we show that blindsight can be induced in normal observers by using transcranial magnetic stimulation of the occipital cortex but exclusively for the affective content of unseen stimuli. Surprisingly, acces...
متن کاملUnconscious influences on decision making in blindsight.
Newell & Shanks (N&S) argue that an explanation for blindsight need not appeal to unconscious brain processes, citing research indicating that the condition merely reflects degraded visual experience. We reply that other evidence suggests blindsighters' predictive behavior under forced choice reflects cognitive access to low-level visual information that does not correlate with visual conscious...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: PLoS ONE
سال: 2013
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0082828