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Sensation and Perception: Vision, Hearing, and other senses

Sensation and Perception: Vision, Hearing, and other senses. Unit 4B. Vision. 1. What is energy that we see as visible light? The Stimulus Input: Light Energy Using your book, define the words below. Transduction (transform) Wavelength Hue (color) Wavelength Intensity Wave amplitude.

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Sensation and Perception: Vision, Hearing, and other senses

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  1. Sensation and Perception: Vision, Hearing, and other senses Unit 4B

  2. Vision

  3. 1. What is energy that we see as visible light?The Stimulus Input: Light EnergyUsing your book, define the words below • Transduction (transform) • Wavelength • Hue (color) • Wavelength • Intensity • Wave amplitude

  4. Electromagnetic Energy SpectrumWe see only a small portion of the spectrum of electromagnetic energy

  5. The Eye: 2. How does the eye transform light energy into neural messages?Define the following terms • Light enters the Cornea • Passes the: Pupil • And the: Iris • Goes to the: Lens which • Accommodationfocuses the image on the: • Retina

  6. The Structure of the Eye

  7. The Structure of the Eye Cornea = outer covering of the eye.

  8. The Structure of the Eye Pupil = the adjustable opening in the center of the eye through which light enters.

  9. The Structure of the Eye • Iris = a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening. • The iris dilates/constricts in response to changing light intensity

  10. The Structure of the Eye Lens = the transparent structure behind the pupil that changes shape to help focus images on the retina.

  11. The Structure of the Eye Retina = the light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information.

  12. The EyeThe Retina • Rods and Cones Cones: Color & Detail Rods: Black & White Peripheral detection

  13. Rods versus Cones

  14. The Retina’s Reaction to Light

  15. The Retina’s Reaction to Light

  16. The Retina’s Reaction to Light

  17. The Retina’s Reaction to Light

  18. The Retina’s Reaction to Light2. How does the eye transform light energy into neural messages?

  19. Visual Information ProcessingFeature Detection • Feature detectors: cells that activate and respond to specific features

  20. Visual Information ProcessingParallel Processing • Parallel processing: the brain divides a scene into sub dimensions such as color, movement, form and depth • Blind sight

  21. Visual information processing

  22. Color Vision • Young-Helmholtz trichromatic (three color) theory: • The eye has 3 color receptors • Red, green, blue • When the cones are stimulated in combination, we see diffrerent colors • Ex, yellow = green + red cones

  23. Color Vision • Opponent-process theory: • We see one color because the other is off. • Three sets of opposite colors • Red-green • Blue-yellow • Black-white • Afterimage

  24. After image: stare at the center for 1 min.

  25. This slide is intentionally left blank.

  26. Summary: • Color Processing happens in two stages: • Retina’s green, red and blue cones respond to stimuli • Then signals are processed by nervous systems opponent (opposite) process cells. • How we see color - Colm Kelleher

  27. Define all the key terms from pages 124 – 133 (18 total) 2. What is energy that we see as visible light? 3. How does the eye transform light energy into neural messages? 4. How does the brain process visual information? 5. What process takes place when we recognize a face? 6. What two theories help us understand color vision?

  28. Hearing: Define key terms pg 134-150 (15)

  29. 2. How does the ear transform sound energy into neural messages? Read page 135, F 4.19

  30. Hearing Loss and Deaf Culture:3. What are the two types of common hearing loss? And how do cochlear implants help? (Read pg 138) • Hearing loss • Conduction hearing loss • Sensorineural hearing loss • Cochlea implant • Cochlear Controversy

  31. Living in a Silent World • 4. Describe the challenges faced by deaf people who have been separated from a supportive society. • Read Close Up on page 139

  32. Biopsychosocial approach to pain:5. Outline the Biopsychosocial approach to pain. (pgs 143-145)

  33. Taste:6. List the survival functions of Basic Taste. • Sweet, sour, salty and bitter • Umami • Taste buds • Chemical sense • Age and taste

  34. Smell (olfaction): 7. Ho do we experience smell?

  35. Summary • Define key terms pg 134-150 (14) • How does the ear transform sound energy into neural messages? • How does the ear transform sound energy into neural messages? • Describe the challenges faced by deaf people who have been separated from a supportive society. • Outline the Biopsychosocial approach to pain. • List the survival functions of Basic Taste.

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