BIO 3303 Lecture Notes - Lecture 13: Optic Chiasm, Lateral Geniculate Nucleus, Visual Cortex
30 Aug 2016
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Document Summary
Light of given wavelength induces responses in multiple cones: colours interpreted as ratio of responses of various cones. Depends on integration; each sends different intensities of signals and ic can figure out which wavelength is coming in. Every colour causes a certain activity on all three cones. Relative output of all types of cones processed to estimate colour. At any number of wavelengths, all three of your cones are firing. The ic is actually figuring out how much signal is coming from all the cones. They maximally see their own particular wavelengths, but they have a larger range so we can calculate the wavelengths coming in to perceive a specific colour in our brains. Lateral inhibition by horizontal cells also important for colour processing colour-contrast neurons excited by one colour and inhibited by the opponent colour: center-surround organization (red and green cones)
