The world would have been colorless, is the brain's "palette" self-determined "color label"

light waves are electromagnetic waves and do not have color, we can identify thousands of different shades because the brain labels visible light information in different bands. Recently, the international academic journal Neuron published a research paper entitled "The hierarchical color processing mechanisms of macaques V1, V2 and V4", which revealed the neural mechanisms of cognitive color space formation.At present, in the abdominal pathway of primate vision brain, color-coded neurons have been found in various visual brain regions from the primary visual cortical layer, through the cortical cortical layer, to the temporal cortical layer. The study, conducted by Wang Wei of the Center for Brain Science and Intelligent Technology Excellence and Innovation of the Chinese Academy of Sciences in collaboration with Tang Shiming Laboratory of the School of Life Sciences of Peking University, detailed the tonal structure of the different visual brain regions of hierarchy using endoensomy signal optical imaging, dual photon imaging and electrophysiological recording.The study found that from primary to middle-level three continuous visual brain regions, there are many different sizes, discrete distribution of color reaction speckle regions, used to encode different light wave band neurons gather in these speckle regions, forming a "tone map." These "tonal maps" are like rainbows of varying sizes scattered across the surface of the visual brain. The tonal map (palette) of the three different levels of the visual cortical layer matches the spatial position of our subjectively perceived hues, which increases significantly with the improvement of the visual cortical level.Combined with other more advanced brain region functions, the visual brain as a whole produces neuronal reactions sensitive to a variety of discrete tones and brightness, and forms a complex neural computing network that encodes the changing light of the outside world, creating colorful "color labels" in the brain. (China Women's Daily)