Lecture 1: 9/27
How does the brain create what we see?
Seeing is hard (calculus is easy for computer, hard for use; seeing is hard for computer, easy for
What is the sense of distance?
o Being able to act on the object
o Being able to communicate thi
Midterm due 10/30
Shift and flip order matters
Cortical cell activity experiment- spontaneous response, almost give up but then notice
o Realize cortical cells dont respond to spots, but respond to edges and lines
o Test with bars i
Lecture 8: 10/23/2012
Perceptual consequence of color opponent cells part II
Either red wins or green wins can't perceive reddish green
Same with blue and yellow
Red and green light together (equal amount of signal) see yellow (+l + m -s). L and M
Lecture 7: 10/18/2012
All information from the right of center of gaze goes to left LGN (lateral geniculate nucleus).
If info is on left side of visual field goes to right LGN (both eyes see both sides)
LGN regulates info flow from retinal ganglion cell
Lecture 6: 10/16/2012
Creating Light and Dark:
o Red - excited, putting out lots of spikes per second. Black- no change/spontaneous
response, blue- inhibition
o On center and off center pair. When on center sees light spot, more activation than off
Lecture 4: 10/9/2012
Brain can turn off awareness of something that is there all the time. Ex: the cells and blood
vessels on top of the photoreceptors.
Eyes are never steady, everything you see is constantly moving so they don't disappear.
Lecture 5: 10/11/2012
100 billion in brain.
Dendrites- receive signals from other neurons or sensory receptors. Other neurons transmit
Axon hillock- either yes or no. ignore input, or transmit it to other neurons. If the sum of all
o Lens- caused by congenital, eye disease, eye injury, old age. Solution- remove and
Fluid Pressure problems
o Aqueous humor- in front of lens
o Vitreous humor- see floaters. Gelatinous humor gets wrinkled/dry, s
Lecture 2: 10/2
Psychophysics = quantitative relationship between stimulus and perception
o Measure how much light is coming off of light circle versus dark circle (physical
luminance) but also perceived li
Lecture 9: 10/25/2012
o RVF goes to LH, LVH goes to right LGN/RH
o If on left side of fixation, goes to right side of retina, goes to right LGN. Then goes to
specific place in R visual cortex
o 6 different complete maps
o If there are