class+18+lecture_posted+_olfaction2_

class+18+lecture_posted+_olfaction2_ - The Neurobiology of...

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The Neurobiology of Smell: From Synapses to Perception (Part 2)
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Identification of Odor Components in  Mixtures n Three or four components seems to be the limit for mixture decomposition q Even for wine and perfume professionals q Training does not help
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Discrimination of Odor Mixture  Component Quality n Familiarity with odors helps to discriminate “contaminants” in known odors n Discrimination depends on what the contaminant is
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Pheromones
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What is a pheromone? n Originally conceptualized as an external hormone q Specialized detection system n Specialized receptors n Vomerulonasal organ n Accessory olfactory bulb
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Rodent pheromone system
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What is a pheromone? n Originally conceptualized as an external hormone q Specialized detection system n Specialized receptors n Vomeronasal organ n Accessory olfactory bulb
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What is a pheromone? n Originally conceptualized as an external hormone q Specialized detection system n Specialized receptors n Vomeronasal organ n Accessory olfactory bulb q Compels behavior n Insect scent trails n Mate selection in lower mammals n Suckling behavior in lower mammals
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Do humans have pheromones? q Do humans have a specialized detection system? n Specialized receptors? q maybe one…
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Do humans have pheromones? q Do humans have a specialized detection system? n Specialized receptors? q maybe one… n Vomerulonasal organ? q 25% have vestigial VNO q 75% have none
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A Human VNO
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Do you humans have pheromones? q Specialized detection system? n Specialized receptors? q maybe one… n Vomerulonasal organ? q 25% have vestigial VNO q 75% have none
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Do you humans have pheromones? q Specialized detection system? n Specialized receptors? q maybe one? n Vomerulonasal organ? q 25% have vestigial VNO q 75% have none n Accessory olfactory bulb? q nope q Compels behavior? n None found yet
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Evidence for olfactory cues influencing  behavior n McClintock’s work showing women’s menstrual cycles synchronize n Pause’s startle modulation study n Major histocompatibility complex info communicated through olfactory cues
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Odor Receptors
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This note was uploaded on 11/17/2011 for the course PSYCHOLOGY 830:301 taught by Professor Staff during the Spring '10 term at Rutgers.

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class+18+lecture_posted+_olfaction2_ - The Neurobiology of...

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