Researchers explain that, like fingerprints, the ridges and grooves on the surface of the brain
With the help of functional magnetic resonance imagingCT scans, researchers at New York University have mapped the primary visual cortex of more than two dozen people. For each of them, the researchers measured the amount of neural tissue dedicated to processing information in different parts of the visual field.
After this, study participants completeda task designed to assess the quality of vision. Participants studied the orientation of patterns displayed on a computer screen, which were used to measure "contrast sensitivity."
The results of the experiment showed that the abilityimage recognition differs depending on the size of the V1 zone: the larger this part of the brain, the higher the “contrast sensitivity”. In addition, researchers have shown that individual differences in the amount of tissue in different areas of the visual cara influence the perception of the visual field. Depending on the “development” of individual sections of V1, the participants in the experiment differently perceived information located to the left, right or above the point where their gaze was fixed.
“We have found that we can predict how muchwell someone can see based on the unique structure of their primary visual cortex,” says Mark Himmelberg, a research fellow at the Center for Neural Science and the Department of Psychology at New York University.
Neuroscientists say that researching how brain structure relates to differences in visual function will help understand differences in how people perceive and interact with their visual environment.
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