Examlex
A positively charged ion is formed when an atom gains electrons.
Centre-surround
A principle often used in neurophysiology and vision science, describing how certain neurons in the visual system have receptive fields with a center region that responds one way (e.g., to light) and a surround region that responds in the opposite way.
Receptive Field
The specific physical area within the sensory space (such as visual or auditory) that can elicit a response from a sensory neuron when stimulated.
Visual Cell
A type of cell in the retina that responds to light, aiding in the process of vision.
Opponent Process Theory
A psychological and neurological model that explains how the perception of colors results from opposing responses between two sets of color receptors in the eyes.
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