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Touch, Taste and Smell 170-177

Touch, Taste and Smell 170-177. Touch. Types of touch Pressure = large nerves Warmth Cold Pain = small nerves **Specialized receptors for each. Touch. Rubber hand illusion – touch is psychological as well as physical. Understanding Pain. Biological Influences Nociceptors under skin

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Touch, Taste and Smell 170-177

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  1. Touch, Taste and Smell 170-177

  2. Touch • Types of touch • Pressure = large nerves • Warmth • Cold • Pain = small nerves **Specialized receptors for each

  3. Touch • Rubber hand illusion – touch is psychological as well as physical

  4. Understanding Pain • Biological Influences • Nociceptors under skin • Gate-control theory • Sensation of pain is the result of “gates” that open and close in spinal chord • Gates open = pain experienced • Endorphins • Phantom limb sensations (9)http://www.youtube.com/watch?v=1mHIv5ToMTM&list=LPh0FXDTLNg5o&index=1&feature=plcp

  5. The pain circuit

  6. The pain circuit

  7. The pain circuit

  8. The pain circuit

  9. The pain circuit

  10. Pain Circuit • Step on tack → activates nociceptors →spinal chord → substance P released • Message goes to Somatosensory cortex in brain

  11. Biopsychosocial approach to pain

  12. Biopsychosocial approach to pain

  13. Biopsychosocial approach to pain

  14. Biopsychosocial approach to pain

  15. Taste = Gustation • Chemical sense • Results from stimulation of special receptors in the mouth → thalamus • Saliva activates taste buds (papillae) on tongue, cheeks, roof of mouth

  16. Taste categories- sweet, salty, bitter, sour and also…

  17. Umami! The unique flavor of protein rich foods (14) http://www.youtube.com/watch?v=Hd_mxyMAJJY

  18. Smell = Olfaction • Chemical sense • Odor molecules • Olfactory bulb • Olfactory nerve

  19. Smell • Stinky room? • Receptor cells in nasal cavity send message to the olfactory bulb in brain • From here go on to memory and emotion areas of the brain

  20. Smell (olfaction)

  21. Pheromones – can you smell the difference?

  22. Pheromones • Chemical signals that affect the behavior of animals of the same species. • Women living together and menstrual cycles • Unclear if they really exist in humans

  23. Kinesthetic/Vestibular Sense • Kinesthetic – feedback about body position and orientation of specific body parts Vestibular – how body is oriented in space; balance. Comes from inner ear.

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