receptive field of visual neurons Flashcards
what is a visual receptive field?
the area of the retinal that when stimulated with light changes the cells activity
-comes in different forms like circular and rectangular
-
Hubel and Wiesel
activity patters of visual neurons determine the location of the stimulus in space and what it is
-neuronal firing rate is proportional to the strength of light intensity
is the V1 rectangular or circular?
rectangular
how many areas does a receptive field have?
a center and a surround that produce opposite responses
On center is ___ surround
off
off center is ____ surround
on
when does the cell fire most?
when there is contrast between receptive fields
what is the effect if light is simultaneously shown in both areas?
weak or no effect.
receptive fields in the fovea are (bigger/smaller)
compared to those in the periphery?
smaller