march 11 - Cortical blindness: dont respond to visual...

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Cortical blindness: don’t respond to visual stimuli Docs found out which part of brain responds to where from world war where soldiers had wounds on different parts of skull. Retinotopic map Receptive fields The area of the world which a neuron responds to is the neuron receptive fields. In the visual field (properties): Location, size, preferred stimulus properties General principle As we move forward (higher up from initial to later processing) into the visual system, receptive fields become larger and preferred stimulus properties more complex. Off-center on surround pics… with dots of light or darkness, etc. the optimal stimulus for the neuron is obviously the condition which shows the neuron firing the most. The pic with neuron and the graph shows peak at optimal conditions when receptors 3-5 are activated. When you activate more receptors, like 2-6, they inhibit the optical receptors and the overall registers as a lower response Edge detectors are neurons with receptors that respond to bars or edges of light. Tuning curves in the visual system show which angle of orientation is best received by a
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march 11 - Cortical blindness: dont respond to visual...

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