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Understanding Your Visual and Auditory Systems

Learn how the nervous system processes light and sound through the electromagnetic spectrum, sensory receptors, rods, cones, chemicals, and hair cell transduction. Discover how visual and auditory information is transmitted to the brain.

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Understanding Your Visual and Auditory Systems

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  1. What is your nervous system?

  2. Neurons

  3. Sight & Sound Processing the Electromagnetic Spectrum

  4. What is the Electromagnetic Spectrum???

  5. Sensory Receptors Got it!!! Rod Cone Chemicals Hair Cell Transduction

  6. Our visual system detects light energy….. …in the Electromagnetic Spectrum.

  7. Our eyes are designed to focus light on our retina. Our retina is in the back of your eye.

  8. Rods & Cones transduce electromagnetic energy… Rod Cone rhod opsin “cone” opsin • Color - “cone”opsin • Light • Dark } rhodopsin …using a photopigments.

  9. The photopigments help to trick us by making you “see” things that are not there!!!

  10. This is called an after-image, and it happens because your cones get “tired”. Cone “cone” opsin “Tired” really means you have broken all your photopigment.

  11. The info is brought to our occipital lobe… Rod Got it!!! Chemicals Occipital Lobe rhod opsin …after making a few stops along the way.

  12. Our auditory system detects energy….. 1.7 centimeter and 17 meters or 20 – 20,000 Hz (waves per second). …in the Electromagnetic Spectrum.

  13. Our ears are designed to catch moving air molecules which causes fluid in our inner ear to move. Inner Ear The hair cells are in the inner ear.

  14. When the fluid in the inner ear moves the cilia on the hair cells bend... …and it pulls on the tip links.

  15. Pulling on the tip links….. …opens the “door” for chemicals.

  16. Bending the “hair” on the hair cells… Got it!!! Chemicals Chemicals …lets the hair cells “talk” to the brain .

  17. The brain then gets the info… … about the sounds.

  18. Sight ???

  19. = Sound Dogs Rule!!! …People & Chickens Drool!!!

  20. Sight & Sound Processing the Electromagnetic Spectrum

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