PS260 Chapter Notes - Chapter 3: Lateral Geniculate Nucleus, Ganglion Cell, Edge Enhancement
Document Summary
Akinetopsia is when one can only detect that an object now is in a position different from its position a moment ago; she reports seeing nothing in between. Two types of photoreceptors: rods are sensitive to low levels of light and are colorblind. Cones: need more incoming light to operate at all and are sensitive to colour differences. They also enable you to discern fine detail. Lateral inhibition: a pattern in which cells when stimulated, inhibit the activity of neighboring cells. Photoreceptors stimulate bipolar cells, which excite ganglion cells. Ganglion cells are spread across the retina but its axons form the bundle of nerve fibers, the optic nerve (carries info from the eye to the brain) This info is then sent to the lateral geniculate nucleus (lgn) then to the occipital lobe. Edge enhancement: a process created by lateral inhibition in which the neurons in the visual system give exaggerated responses to edges of surfaces.
