Visual perception: sunny side up.
Illumination, both natural and artificial, typically comes from above. Neurons in visual area V4--part of the object-processing pathway in the primate brain--may rely on this anisotropy to infer three-dimensional structure from shading cues.
Connor
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Johns Hopkins University, 338 Krieger Hall, 3400 North Charles Street, Baltimore, Maryland 21218, USA. connor@jhu.edu
D000818:Animals; D006801:Humans; D010775:Photic Stimulation; D014793:Visual Cortex / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*