PSY 111 Lecture Notes - Lecture 4: David H. Hubel, Torsten Wiesel, Visual Cortex
30 Sep 2016
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Document Summary
Seeking information is a basic human need (paanskep, 2004) Our prior observations influence our current expectations. Update our priors when we get new information. Our prior experience changes how we see. Light enters eye, passes through arteries, veins, and sensory neurons, and then finally reacts with our photoreceptors. Blue field entoptic phenomenon aka blue sky sprites . Less sensitive overall, but sensitive to color. Retinal rods and cones are connected by bipolar cells. These cells actively inhibit information from neighboring cells. Fires when light hits center, inhibited when light hits surround. Fires when light hits surround, inhibited when light hits center. Firing rate changes depending on how much of the receptive field is illuminated. When whole area is illuminated, firing rate only increases slightly. Information travels from the eye to optic chiasm where it is separated into left and right parts of the scene. Then to lateral geniculate nucleus (part of thalamus) Then to occipital lobe in back of brain.
