Flashcards in physiology of vision Deck (14):
what is the direct/vertical pathway for signal transmission?
photoreceptors- biploar cells-ganglion cells
what do horizontal cells do?
get input from photoreceptors and project with other photoreceptors and bipolar cells
what do amacrine cells do?
get input from bipolar cells and project to ganglion and bipolar cells and other amacrine cells
what are the 2 types of photorecptors?
rods and cones
when is there more glutamate? in the dark or in the light?
in the dark...
hyperpolarization occurs in response to>>>?
rods help seeing in..?
cones help seeing in..?
normal day light
more convergence on rods or cones?
what deals with colour, rods or cones?
what are the differences between rods and cones?
rods- ahcromatic, peripheral retina, high convergence, high light sensitivity, low visual acuity
cones- chromatic, central retina, low convergence, low light sensitivity, high visual acuity
where are the first binolcular neurones?
what does lateral inhibiton do?
exaggerates the difference in stimulus intensity detetced by adjacent neurones and aids localisation
also modifies the receptive fields of ganglion cells to have centre surround organization. ( ephasizes areas of contrast)