Soloman Flashcards
What is the parvocellular pathway good for
Spatial resolution-higher spatial density
What is the parvocellular pathway not good for
Temporal resolution
What patheway is used to see motion
magnocellular
What is mengnocellualr pathway good for
temporal resolution
What is the magnocellular pathway not good for
Spatial resolution - lower spatial density
What is responsible for motion
rods
What are the first neruons to respond with an action potential in retina
ganglion cells
What affests the neural response of ganglion cells?
photoreceptors, horizontal cells, bipolar cells, amacrine cells
For most positions on the surface of the retina, flashing a spot of light has …….
absolutely no effect on the cell’s response (that is, it continues responding at its spontaneous firing rate).
Within a particular region, called the…… ……flashing the spot affects the………..
1.receptive fields
2.RGCs response
Defention of receptive field
Region of the visual field in which light stimuli evoke responses in the ganglion cell
Describe coverage of ON/OFF cells
There is complete coverage: ON-center and OFF-center receptive fields each completely cover the visual field
Where do the ON/OFF nerual signals of the RGC converge?
The neural signals originating in the ON- and OFF-center retinal ganglion cells remain segregated in the retina and the LGN, then merge completely in the complex cells in primary visual cortex (V1).
why is stimuli presented on grey screen
Extreme contrasts (white or black) can create edge effects interfere with accurate stimulus perception.
Gray allows better control over stimulus luminance-easier to define contrast changes.
Why use a camera to track an animals eye movements
To ensure they actually saw the stimulus instead of an artifact (bizley)
