PSYC 2390 Chapter Notes - Chapter 2: Visual Acuity, Eye Strain, Presbyopia
27 Jan 2015
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Chapter 2: electrical signals in neurons: sensory receptors are neurons specialized to respond to environmental stimuli. Recording electrical signals in neurons: two electrodes: a recording electrode, with the tip inside the neuron, and a reference electrode, located some distance away so it is not affected by the electrical signals, the action potential lasts about a millisecond, physiology of perception, nervous system is a system of communication. It allows one structure to be able to communicate to another structure. It is also an electrical system because it uses electricity to communicate. The cell body in mammals is small and there is genetic info that tells the cell how to become a nerve cell. We"re going to spend more time talking about dendrites and axons though. Dendrites receive information and the axon sends information. Can travel from 2 mph to 224 mph. The perpetual system makes use of this because it"s a way of prioritizing information.
