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Special Senses

Special Senses. Chemical Senses. Olfaction. Nasal Cavity. Nasal Bones: Models. Nasal Bone: Drawings. Nasal Cavity Lining. Olfactory Epithelium Location. Olfactory Mucosa. Olfactory Receptor Cells (OC) Basal Cells (BC) Sustentacular Cells (SC). Olfactory Bulb. Olfactory Modalities.

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Special Senses

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  1. Special Senses Chemical Senses

  2. Olfaction

  3. Nasal Cavity

  4. Nasal Bones: Models

  5. Nasal Bone: Drawings

  6. Nasal Cavity Lining

  7. Olfactory Epithelium Location

  8. Olfactory Mucosa Olfactory Receptor Cells (OC) Basal Cells (BC) Sustentacular Cells (SC)

  9. Olfactory Bulb

  10. Olfactory Modalities • Aromatic • Fragrant • Repulsive • Ethereal • Resinous • Spicy • Burned • Putrid Gaseous or Volatile Liquids 16 Chemical Elements produce Odor Sensation

  11. Smell Physiology

  12. Olfactory Tract

  13. CN I and Rhinencephalon

  14. CN 1 entering Base of brain at Olfactory Gyrus

  15. Olfaction and the Limbic System

  16. Gustation

  17. Tongue Anatomy

  18. Tongue Papilla

  19. Taste Bud Histology

  20. Taste Bud Stimulus

  21. Taste Maps • Sweet • Responds to sugars • Responds to AA • Sour • Responds to H+ • Salty • Responds to NaCl, salts • Responds to metal ions • Bitter • Responds to alkaloids

  22. Areas of Innervation

  23. Temperature Concentration Order Interaction Taste Sensations

  24. Nerves for Taste: CN VII, IX, XII • Chorda tympani of CN 7 • Lingual Branch of CN 9 • Pharyngeal Branch of CN 10 • Myelinated Delta A fibers go to the Nucleus Tractus Solitarius  Thalamus  Parietal Lobe

  25. Gustatory Pathway • CN VII, IX, X • Medulla • Thalamus • Parietal Lobe: Gustatory Cortex

  26. Effects on Taste • Smell • Temperature of food • Texture of food • Visual appearance of food

  27. Problems Glossitis Cancer of the Tongue

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