Deaf adults have distinctly superior peripheral vision, finds new study
Neuroscientists have discovered that deaf adults develop superior peripheral vision through a neurological trade-off that redistributes brain resources. The primary visual cortex reallocates processing power from the central field to far-peripheral vision to compensate for sensory loss.
Why it matters
This research provides deeper insight into neuroplasticity and how the human brain adapts to sensory deprivation to enhance environmental awareness.
In a remarkable example of the human brain’s adaptability to sensory loss, scientists have found that people with deafness develop superior peripheral vision, which is vision outside the eyes’ central focus.
Researchers from the Universities of York and Sheffield used MRI scans along with visual stimuli among 16 hearing adults and 16 deaf adults and compared them. They found that the latter group responded to objects and movements even in the far-reaches of their eyesight, granting them an extra advantage in sensing their environment and detecting danger.
The brain is rewired, with a redistribution of neural resources: among the deaf, there was a greater neural weightage given to far-peripheral vision in the primary visual cortex (the part of the brain responsible for deconstructing visual input) and the lateral geniculate nucleus (a visual relay centre situated deep within the brain).
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