Search Results for "Visual Ambiguity"
Original Source: Visual perception: ambiguity involving parietal cortex.
Our brain is constantly interpreting ambiguous sensory input to deliver a stable perceptual representation of the environment. Two new studies suggest that superior parietal cortex plays a causal role in resolving perceptual ambiguity. Ironically, their results are somewhat ambiguous as to what that role might be.
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Visual acuity (VA) is acuteness or clearness of vision, which is dependent on the sharpness of the retinal focus within the eye and the sensitivity of the interpretative faculty of the brain. Visu...
Ophthalmology is the branch of medicine that is devoted to the study and treatment of eye diseases. As well as mild visual defects correctable by lenses, ophthalmology is concerned with glaucoma,...
Macular degeneration in the elderly (AMD) is a major cause of blindness. Its prevalence increases to 30% in patients 75 to 85 years of age. AMD occurs in two forms: dry and wet AMD. Central geograph...
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Electrocorticography links human temporoparietal junction to visual perception
The authors found that subdural electrical stimulation of visual cortex only produced a visual percept if high-frequency gamma oscillations were evoked in the temporoparietal junction (TPJ). Furthermo...
Cortico-cortical projections in mouse visual cortex are functionally target specific
Tuning of neurons in higher visual cortices is less diverse than in primary visual cortex (V1), but the mechanisms underlying this specialization are unknown. In this paper, Glickfeld and colleagues u...
Attention deficits without cortical neuronal deficits
The ability to process relevant stimuli selectively is a fundamental function of the primate visual system. The best-understood correlate of this function is the enhanced response of neurons in the vi...
Sensory substitution devices provide visual information to the blind via existing senses
Common wisdom has it that if the visual cortex in the brain is deprived of visual information in early infanthood, it may never develop properly its functional specialization, making sight restoration...
Responses of pulvinar neurons reflect a subject's confidence in visual categorization
Here the authors report evidence for the neural correlates of confidence in the primate pulvinar, a visual thalamic nucleus. Data from electrophysiological recordings, functional silencing and theoret...
The visual information from eyes is sent into the brain unconsciously even if you are not aware. One example of unconscious seeing is a phenomenon called "blindsight" [Subjects have no awareness, but...
Object tracking in motion-blind flies
In response to the movement of its visual world, Drosophila is capable of optomotor response in head and body turning, as well as a visual fixation response. This study shows that blocking the visual...
Parietal brain cells sort visual information into categories: Study
A region of the brain known to play a key role in visual and spatial processing has a parallel function: sorting visual information into categories, according to a new study by researchers at the Univ...
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Feature priming and the capture of visual attention: Linking two ambiguity resolution hypotheses.
Visual search for a unique stimulus is often faster when the feature defining this target is repeated. Recent research has related this feature priming to ambiguity: priming effects appear stronger wh...
Visual perception: ambiguity involving parietal cortex.
Our brain is constantly interpreting ambiguous sensory input to deliver a stable perceptual representation of the environment. Two new studies suggest that superior parietal cortex plays a causal role...
OBJECTIVE: To examine the effects of communicating uncertainty regarding individualized colorectal cancer risk estimates and to identify factors that influence these effects. METHODS: Two Web-based ex...
Beyond risk and ambiguity: Deciding under ignorance.
In this study, we examined the neural basis of decision making under different types of uncertainty that involve missing information: ambiguity (vague probabilities) and sample space ignorance (SSI; u...
Chimpanzees and bonobos distinguish between risk and ambiguity.
Although recent research has investigated animal decision-making under risk, little is known about how animals choose under conditions of ambiguity when they lack information about the available alter...
