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Updated: Monday, April 12, 1999 10:50:08 AM

Intro to Psych Perspectives History & People
 Epistemology Bettelheim's Autism Scientific Method & Experiments
Experimental Termonology Neurotransmitters Neurotransmission
Anatomy of the Brain Split Brain Brain Imaging
Neural Plasticity Auditory System Visual System

Section 1: Visual System

Key points on visual the visual system
  • Photoreceptors are not on the surface of the retina
  • There are blood vessels over the retina
  • There is a blind spot in the retina at the optic nerve
  • The retinal image is inverted

Inter-species Sensory Differences:

  • Cats do not taste sweet
  • Insects see infrared
  • Frogs only see what moves

Qualia are not properties of matter
    They are properties of mind

Examples of qualia are:

  • Smells
  • Feelings
  • Colors

Reality is not recorded directly, the mind makes a model of reality and stores them as representations.

Our perceptions and our dreams are strongly influenced by our mind's stored representations.

 Miller-lyer illusion:  >––––<    vs  <––––> is infact just as long as although both lines are the same length, we typically percieve the one on the left to be longer (if properly drawn.) this illusion partly culturally determined (societies that have little or no experience angular architecture are less susceptible than westerners to this phenonomon.

 

Note: Right visual field is being picked up by both eyes… but your retina is also split so …

Click here to go back to the brain section
if you are visiting from the split brain section

Stimulus -
Tactile vision substitute

A camera registers a picture, then converts it to a pixilated image map so that pins in the back of a chair are able to produce a relief of the image.

Binocular Cues - Detection with 2 eyes

Retinal disparity – retinas present an image that is different on each retina.
Convergence – measuring the muscle movements – determine distance of an object

Monocular Cue - Detection with 1 eye
  1. Relative Clarity
  2. Texture Gradient
  3. Relative size
  4. Relative motion
  5. Relative brightness
  6. Linear perspective-
Near sighted verse far sighted

Based on the shape of the eyeball

If the eyeball is too short, then the person is far sighted
If the eyeball is too elongated egg shaped, then the person is near

Ganglia are responsible for higher level processing of the integration of the image that one sees


 

 

 

 

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