In daylight vision, a spectrum of wavelengths of light is sampled by our photoreceptors; from this, we perceive a range of colors. However, the space of colors we perceive is different from the space of visible light wavelengths (e.g. 650 nm red and 400 nm violet appear more similar to each other than either does to 525 nm green). Furthermore, perceptual color space is similar across individuals with different retinal circuitry and those raised in different visual environments. Explaining how our perceptual color space arises is therefore an interesting scientific question, and may also help reveal general mechanisms for how the brain builds representations of the world. My project so far has focused on modeling how an organization for perceptual color space might emerge in primary visual cortex, based on optical and two-photon calcium imaging results from macaque monkey.
Related Publications and Presentations
- Christopher E. Ball, Julien B. Ciroux, and James A. Bednar, “Orientation-contingent color aftereffects (the McCollough effect) can arise through Hebbian synaptic adaptation of horizontal connections”, Society for Neuroscience (SfN), 2010.
- Christopher E. Ball, and James A. Bednar, “A self-organizing model of color, ocular dominance, and orientation selectivity in the primary visual cortex”, Society for Neuroscience (SfN), 2009.