NEUROSCI 101 Lecture Notes - Lecture 8: Olfactory Bulb, Olfactory Nerve, Neural Pathway

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17 May 2016
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Auditory System:
1. How is it similar to the visual system?
2. How is it different?
3. What is the external energy?
4. What/where is the receptor?
5. How does transduction occur
6. Wjat os the neural pathway?
7. How does coding for frequency/pitch and location and intensity occur?
8. Evidence that the auditory system “interprets” incoming sounds - not a digital recording.
Olfactory System:
1. Is olfaction important?
2. Where are the receptors?
a. very back of olfactory bulb, dangling neuron’s dendrites sticks through bones in
back of skull (cribiform bone plate) at end of olfactory nerve
3. How do the receptors transduce smells into action potentials?
a. Odorants are complex chemicals with multiple receptor bindings making up each
odor. Different features attach to different receptors. Odors act as metabotrophic
receptors that indirectly bind to chemical messengers to open ion gates; the
changes in ion flow that yield action potentials is the same as that for
neurotransmitters.
4. What is the neural pathway to the cortex?
5. Coding:
a. how do we code for diff. odors?
b. the pleasantness of odors?
c. intensity?
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