Notes nov 28th
- 1. Transduction • Transforming signals into neural impulses. • Information goes from the senses to the thalamus , then to the various areas in the brain. Remember Ethan in Sky High. He changes his body to slime. Solid form to liquid form. Change from one form of energy to another.
- 2. Energy vs. Chemical senses Energy Senses Chemical Senses Vision Touch Hearing Taste Smell
- 3. Vision • Our most dominating sense. • Visual Capture
- 5. Chapter 4
- 6. 6 Chapter 4
- 7. Chapter 4
- 8. A Journey Through the Human Eye: How We See • http://www.youtube.com/watch?v=gvozcv8pS 3c
- 9. THE EYE AND VISION • Light enters the eye and then is projected onto a surface • The amount of light that enters the eye is determined by the size of the pupil which adjusts automatically to the amount of light entering the eye • Once light enters the eye, it encounters the lens which adjusts to the distance of objects by changing its thickness
- 10. Question: How does the eye enable vision? • These changes project a clear image of the object onto the retina, which consists of neurons that are sensitive to the light called photoreceptors • Once the light hits the photoreceptors, a nerve carries the visual input into the brain where the information is relayed to the visual area of the occipital lobe THE EYE AND VISION
- 11. 11 Chapter 4
- 13. Phase One: Gathering Light • The height of a wave gives us it’s intensity (brightness). • The length of the wave gives us it’s hue (color). • The longer the wave the more red. • The shorter the wavelength the more violet.
- 14. Phase Two: Getting the light in the eye
- 16. Transduction Continued • Order is Rods/Cones to Bipolar to Ganglion to Optic Nerve. • Sends info to thalamus- area called lateral geniculate nucleus (LGN). • Then sent to cerebral cortexes. • Where the optic nerves cross is called the optic chiasm.
- 18. Phase Four: In the Brain • Goes to the Visual Cortex located in the Occipital Lobe of the Cerebral Cortex. • Feature Detectors. • Parallel ProcessingWe have specific cells that see the lines, motion, curves and other features of this turkey. These cells are called feature detectors.
- 19. Cornea, iris, pupil, lens, retina, optic nerve