Unit III, Sensation & Perception: The Other Senses

1. Unit III, Sensation & Perception: The Other Senses

2. Smell & Taste • Smell & taste are chemical senses • We sense molecules of substances as opposed to waves • Smell • Odors of substances are detected by receptor neurons high in each nostril • The receptors send information about the odors to the brain via the olfactory nerve • Adapts quickly to the smells around you

3. Smell & Taste

4. Smell & Taste

5. Smell & Taste • Taste • Dogs vs. Cats • Four basic qualities: • Sweetness • Sourness • Saltiness • Bitterness • Taste is sensed through receptor neurons located on taste buds on the tongue • Sensitivities to different tastes can be inherited • “Taste Blind”

6. Smell & Taste

7. Smell & Taste

8. Smell & Taste

9. Smell & Taste

10. The Skin Senses • Touch is a combination of pressure, temperature, & pain. • Pressure • Receptors located around root of hair cells and beneath the skin • Some body parts are more sensitive than to pressure than others • Temperature • Neurons located just beneath the skin • Hot & Cold Sensory Neurons

11. The Skin Senses • Pain • Not all areas of the body are equally sensitive to pain. • Depends on the number of pain receptors in a particular area • Women are more sensitive to pain than men • Gate Theory – Brain can only process a certain amount of info at a time

12. The Skin Senses

13. The Skin Senses

14. Body Senses • Vestibular Sense (Balance) – Tells you whether you are physically upright without having to use your eyes. • Sensory organs in middle ear monitor motion, position, & gravity (Semicircular Canal) • Kinesthesis sense(Movement) • Informs people about the position and motion of their bodies. • Info. fed to brain via sensory organs in joints, tendons, and muscles.

15. Body Senses