L3Vision.6slides - Will cover: 1-2 (History/Methods,...

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1 Page 1 1 Will cover: Lectures 1-2 (History/Methods, Perception) Chapter 1 and pp. 75-100 See Exam 1 review sheet for topics 2 Issues: (a) What is the basic visual anatomy? (b) How is visual information coded? (c) How is visual information processed? 1. Overview 2. The eye Retina, ganglion cells 3. The thalamus 4. Visual cortex Simple, complex & hypercomplex cells 5. Two visual pathways: What vs. where 4 Light is emitted from a light source. Some frequencies of light are absorbed by a distal stimulus. Other frequencies of light are reflected. Some of this light reaches your eyes.
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2 Page 2 7 Light Neural signals To Brain 8 Rods and cones are photo-receptors. A photo-chemical reaction takes place inside these cells when exposed to light. Rods detect brightness. Cones are concentrated in the fovea. Most people have three types of cones: Blue, green, red 9 Rods & Cones Bipolar Cells Ganglion Cells 10 Light Neural signals To Brain Difference in charge inside vs. outside axon: Potential Potential
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3 Page 3 Resting Potential Action Potential Resting Potential Potential 14 1. Threshold : Potential must get above a threshold level for neuron to fire Firing = generating an action potential
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L3Vision.6slides - Will cover: 1-2 (History/Methods,...

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