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PSY 200: Neuroscience - 2
prefrontal cortex has to do with: |
attention
planning
interpersonal and emotional behaviors |
the two hemispheres are connected by ___ |
the corpus callosum |
split brain |
severing of the corpus callosum so that the two hemispheres cannot communicate |
would you know if you were talking to someone with a split brain? |
essentially not |
right hemisphere focuses on |
taking in the global (like seeing the "L" made out of 's'
gestures |
left hemisphere focuses on: |
taking in the local (seeing the 's' that make up the "L")
speech |
it's less clear to identify hemisphere specialization in ___ |
lef-handers and women |
____ photoreceptors respond to light |
126 million |
___ retinal ganglion cells carrying messages to the brain |
1 million |
lots of neural convergence: many photoreceptors signal the same ____ |
ganglion cell |
ganglion |
a nerve cell cluster or a group of nerve cell bodies located in the peripheral nervous system. |
retinal ganglion cell's receptive field |
the group of photoreceptors that connect to that cell
or
the region in space that the cell "sees" |
retinal ganglion cells are wired in a ___ and called ___ |
center vs. surround way
lateral inhibition |
why have lateral inhibition? |
makes the system preferentially respond to edges/changes
creates efficiency |
cells in V1 like ___ |
oriented edges or bars of light |
specificity coding |
a single cell (grandmother cell) signals a single perceptual property |
___ has a cell tuned to just one object |
specificity coding |
distributed coding |
it is the pattern of activity across a number of cells that is important for perception |
we use ___ coding |
distributed |
distributed coding creates ___ |
efficiency
allows for fine discrimination along a dimension (ex. orientation) using only few 'detector' neurons |
____ is a form of distributed coding |
color vision |
___ contains many wavelengths |
whit light (the light from the sun) |
color matching |
subject can match any color by adjusting the intensity of three primary lights |
3 cone types: |
short wave length light: s-cone - blue
m-cone : green
l-cone: red |
we can see so many colors because of ____ |
distributed coding |