You mention that dark acts as a stimulus for rods and cones. So my question is whether the ganglion cells that send info via the optic nerve are activated by dark rather than light?
The off centre cells (i.e. those activated by a black dot on a white page) are. The on center cells are not. We have not covered why. But FYI, the on center ganglion cells have an inhibitory connection between the center receptor and the bipolar cell. The off center ganglion cells have an excitatory connection. L2 Visual Cortex Question. In Session 2, the sentence reads: “The LGN is composed of 6 layers. 3 receive info from one eye, 3 from the other.” I don’t really understand how each LGN (one on each lobe of the thalamus) receives input from BOTH eyes, since the optic tracts from each eye aren’t supposed to recombine until they reach the primary visual cortex. Answer: They do not combine onto the same neuron until they reach the binocular cells in primary visual cortex. These cells are located above and below layer 4 and are responsible for stereopsis. Question. Does the medial temporal motion area typically have more complex cells than the V1 area to allow for accurate detection of
