1. What is the last dream you remember that is school appropriate?
Bell Work

2. SENSES AND PERCEPTIONS!!!!!
The basis of experience!

3. Definitions Sensation: Perception:
Stimulation of sensory receptors and the transmission of sensory information to the CNS
Perception:
Interpretation of sensory information

4. The Basics: Senses

5. Absolute Threshold
Weakest stimulus sensed.

6. Difference Threshold
Minimum amount of difference that can be detected between two stimuli
Difference in paint chips

7. Sensory Adaptation
Process of becoming more sensitive to weak stimuli and less sensitive to unchanging stimuli
Blind, use other senses
Furniture moving prank
Traffic sounds

8. Vision

9. Light Electromagnetic Energy Wavelengths We don’t see all
Rainbows = visual of spectrum

10. The Eye Light enters through Pupil
Controls amount of light
Adjusts automagically
The Lens is encountered once light enters
Adjusts to the distance of objects by changing thickness.
Hold finer out, then bring it slowly to your nose. Follow the finger with your eyes.
What do you feel?

11. The Eye
The Retina is the surface that consists of neurons that is sensitive to light.
Neurons sensitive to light are Photoreceptors

12. Blind Spot

13. More Eye Goodness The Blind Spot Rods and Cones
Where the optic nerve travels to the brain, cannot receive
Rods and Cones
Rods – sensitive to brightness of light (Black and White)
Cones – Color Vision
Dark and Light Adaptation
Adapting between light and dark environments

14. Afterimages in Color Vision

15. Color Blindness Partially or totally unable to distinguish color
Absence/Malfunction in Cones
Total Colorblindness is rare

16. Color Blindness

17. Color Blindness

18. Color Blindness

19. Color Blindness

20. Hearing

21. Pitch – Aca-Excuse Me! Sound waves Depends on frequency Rubber bands?
Some animals have better hearing

22. Loudness
Higher waves are louder
Decibels

23. The Ear
Shaped to catch sound waves
Eardrum
Vibrates to transmit sound

24. Locating Sounds
Using ears to locate sounds
Turn head
Vision

25. Hearing
Teenager Hearing Loss
Hearing Test

26. Other Senses

27. Smell Weak Taste Odors detected by receptor neurons
Adaptation to smell
Stinky smells
Dangerous

28. Taste Sweetness Sourness Bitterness Saltiness
Flavor: odor, texture, temperature, taste

29. Le Tongue

30. The Skin Senses Not “Touch” Pressure Temperature Hair cells
Structures sensitive: fingertips, lips, nose, cheeks vs. calves, thighs, and shoulders
Temperature
Temperature sensors beneath skin

31. Skin Senses Pain Adaptive Not all areas equally sensitive
Origin at point of contact
CNS – spinal cord to thalamus – cerebral cortex
Rubbing/scratching
Gate theory
Use different sensations to distract brain

32. Phantom Limb
Amputees

33. Body Senses Vestibular Sense Kinesthesis
Physical alignment (upright, laying down, etc.)
You know without thinking/looking
Kinesthesis
Close your eyes.
Touch your nose.
Sense that informs people about position/motion
Joint, tendons, and muscles

34. Divide into six groups. Two groups may have more than five people

35. Groups:
Vision
Hearing
Smell
Taste
Skin Senses
Body Senses

36. Define, Draw, Describe
Define your term simply and draw an image for the front of a postcard.
On the back, put each persons name and a description of how sensory information is relayed to the brain