SnPStudyGuide2-2 - EXP 3202 Sensation and Perception Study...

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EXP 3202 Sensation and Perception Study Guide for Exam 2 Lecture study questions: 1. Compare a neuron-to-neuron synapse to a hair cell-to-neuron synapse. Draw a typical synapse. If an action potential reaches the terminal of the presynaptic cell, what sequence of events happens to result in a synaptic potential in the postsynaptic cell (be sure to use proper terms and the proper sequence of events)? Draw a typical hair cell. What happens when the stereocilia are deflected and then what sequence of events happens to result in an action potential being sent to the brain? 2. What is a cochlear implant and how does it work. What principle of cochlear function/neural coding does it taking advantage of? 3. What is tinnitus? What are some of the causes of tinnitus? What evidence suggests that some forms of tinnitus are not generated by the ear? What does tinnitus tell us about how perception relates to physical changes in the world around us? 4. How is information about sound frequency coded in the brain? How is information about the intensity of a sound coded in the brain? 5. What are the cues that we use for determining where a sound is located? Which one works best for high frequency sounds and which works best for low frequency sounds? Where does coding of interaural time differences begin in the brain? What is meant by “phase locking” and why is it important for coding time differences?
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