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Chapter 16 - PowerPoint PPT Presentation

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Chapter 16
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  1. Chapter 16 The Special Senses

  2. Smell

  3. Taste

  4. Effects of Different tastes on neurons

  5. Eye terminology • Lacrimal apparatus • Lysozymes • Meibomian glands • Extrinsic eye muscles

  6. Tunics Fibrous tunic • Cornea (cover) • Sclera (white Vascular Tunic • Choroid (vascular) • Iris (colored) • Ciliary body (muscle) • Pupil (light regulation) Retina • Photoreceptor layer • Rods and cones • Fovea centralis • Optic disc

  7. Responses of Pupil to Light

  8. Normal Retina

  9. Refraction of Light Rays

  10. Rods and ConesRods for B & W vision (120 million)Cones for color vision (6 million)Most in the Fovea

  11. Image Formation • Refraction of Light Rays • Accommodation of the Lens • Constriction of the Pupil • Convergence

  12. Image Problems • Cataracts • Age-related macular disease • Presbyopia (loss of lens elasticity) • Color Blindness • Light and dark adaptation

  13. Hearing and Equilibrium

  14. Otoliths

  15. Words to Know • Cataracts Conjuctivitis • Glaucoma Keratitis • Deafness Otalgia • Meniere’s syndrome Tinnitus • Otitis media Vertigo • Anosmia Myopia • Blepharitis Hypermetropia • Astigmatism Presbyopia

  16. More Words • Hyposmia • Gustation • Taste aversion