Visual images must reach the cerebral cortex to be perceived, but the data are often missing details when they are sent from the eyes to the visual cortex.
New Insight into Visual Perception Mechanism
Human brain may know which eye is receiving information and can turn around and tell the eye to work even harder, suggests study.
Human brain may know which eye is receiving information and can turn around and tell the eye to work even harder, suggests study.
‘The missed details of visual images are filled by the feedback from the brain at early stages of cortical processing.
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Visual images and other raw sensory data must reach the cerebral cortex to be perceived, but the data are often missing details when they are sent from the eyes to the visual cortex, the part of the brain responsible for seeing. Thus, our visual system regularly fills in extensive details to create enriched images that help us to understand and interpret what we see. A growing body of evidence suggests these "filled-in" visual signals are represented at early stages of cortical processing. The researchers used fMRI on study participants to explore the neural mechanisms underlying the reconstruction of these "filled-in" images. They found that "intermediate" object features, which aren't in the retinal signals but are inferred during kinetic transformation, are reconstructed in neural responses at early stages of cortical processing, presumably via feedback from high-level brain areas.
"Many human activities critically rely on extensive reconstruction of missing details of sensory information," says senior author Won Mok Shim, an assistant professor of Psychological and Brain Sciences at Dartmouth whose research explores how the human visual system gives rise to visual perception and experience. "Understanding the mechanisms of this reconstruction process and how to fill in gaps in our perception with internally reconstructed visual information has broad applicability to science and engineering that is impacted by the interface between sighted humans and machines of all types."
Superior Visual Ability in Infancy may Predict Emerging Autism Later
Enhanced visual search abilities in children who have autism are present early in their infancy before the onset of clinical symptoms of autism.
Enhanced visual search abilities in children who have autism are present early in their infancy before the onset of clinical symptoms of autism.
Source-Eurekalert
Visual Ability Can be Improved With Training
Thus far an impression of an irreparable limitation of human perception exists that people strain to perceive things in the extremely rapid succession of approximately less than half a second.
Thus far an impression of an irreparable limitation of human perception exists that people strain to perceive things in the extremely rapid succession of approximately less than half a second.
Declining Intelligence in Old Age Linked to Visual Perception Speed
Researchers have revealed one of the basic processes that may help to explain why some people's thinking skills decrease in old age.
Researchers have revealed one of the basic processes that may help to explain why some people's thinking skills decrease in old age.
