Neuroscientists from Tübingen have discovered how our brain processes visual stimuli above and below the horizon differently. The researchers led by Dr. Ziad Hafed of the Werner Reichardt Centre for Integrative Neuroscience (CIN) at the University of Tübingen investigated non-human primates, ascertaining that different parts of the visual field are represented asymmetrically in the superior colliculus, a brain structure central to visual perception and behavior. More neural tissue is assigned to the upper visual field than to the lower. As a result, visual stimuli above the horizon are processed sharper, stronger, and faster: our brain is wearing bifocals, so to speak.
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