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20 Cards in this Set

  • Front
  • Back
What is the lateral geniculate nucleus (LGNs)?
Located in the thalamus and receives input from the retinal ganglion cells and has inputs and outputs connections to the visual cortex
What are the magnocellular layers?
the larger neurons located in the bottom 2 layers of the LGN
What is the parvocellular layer?
The smaller 4 layers of neurons in the LGN
Where does the magnocellular layer receive input from?
parasol ganglion cells
Where does the parvocellular layer receive input from?
midget ganglion cells
What do the magnocellular layers respond to?
large, fast moving objects
What does the parvocellular layers respond do?
process details of stationary targets
What kind of maping does our visual field use?
What part of the brain is responsible for processing visual input
primary visual cortex or VI
What is orientation tuning?
the tendency of neurons to respond optimally to certain orientations
What are simple cells?
cells with clearly defined excitatory and inhabitory regions
What are complex cells?
cells whose receptive-field characteristics cannot be easily predicted
What is end stopping and which cells contain this property?
Its the process by which firing increases as a bar length increases and fills the receptive field and firing decreases as the bar lengthens past the receptive field. Striate cortex cells have this property.
All preferences for certain orientations can be found in ___ of a column
Each section of the cortex is a ________________
What is a hypercolumn?
A 1mm block of striate cortex that contains every preference responsible for the visual world
What is the tilt aftereffect?
the illusion of tilting from adaption to a pattern of a given orientation
What is faurier analysis?
breaking down complex pattern into sine waves
Neurons that respond te same way are call....
What are sine waves?
stripes with fuzzy edges