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Olfaction and Taste

Olfaction and Taste

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Olfaction and Taste

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Presentation Transcript

  1. Olfaction and Taste Haythum Tayeb, PGY-4 McGill Neurology Residency Program Academic Half Day

  2. Our “chemical” senses • Olfactory system “rhinencephalon” • Taste (gustation) • Somatosensory component

  3. The Olfactory System - outline • Signal reception • The olfactory epithelium, olfactory receptor neurons • Signal transduction • Pathway: • Olfactory bulbs • tracts • Cortical areas • Disorders of olfaction

  4. Your nose

  5. Receptors & Transduction

  6. Olfactory bulb and tracts

  7. Disorders of olfaction • Anosmia vs olfactory agnosia • Causes of anosmia • What’s specific anosmia? • What are the causes of hyperosmia? • Parosmia (dysosmia) • Cacosmia (uncinate) • Phantosmia (olfactory hallucinations)

  8. Taste…

  9. Taste - outline • Receptor apparatus: • Taste buds and Papillae • Receptors and transduction • Peripheral pathway • Central pathway and cortical areas • Clinical notes

  10. Taste buds • Extra-lingual • Lingual

  11. Taste Buds

  12. Disturbances of taste • Ageusia • Hypogeusia • Parageusia (dysgeusia) • Cacogeusia • Gustatory hallucinations

  13. Wake up! Finished!