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Identify the structure that allows light to first enter the eye.

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Which of the following is false about primate vision? a. V1 receives visual input from the LGN.b. Most of the retinal output feeds directly to the LGN.c. The LGN receives its greatest input from the cortex.d. In the primary visual pathway the number of synaptic sites between, but not including the retina and the initial cortical destination, is one.e. All visual input to the visual cortex is via V1.

. Which of the following statements is true? a. It is not possible for experimenters to map out the inhibitory lobes of receptive fields because cells cannot fire negatively.b. A simple cell with a single excitatory lobe and a single inhibitory lobe cannot be made to respond to a light bar stimulus.c. Complex cells are needed to encode contour orientation because simple cells cannot perform this job on their own.d. A simple cell cannot distinguish between a low contrast contour at the cell's preferred orientation and a higher contrast contour at a slightly different orientation. e. Most simple cells respond to a range of contour orientations including the one that is orthogonal to the cell's preferred orientation

Which of the following is true about primate vision? a. The major output from V1 is feedback to the retina.b. The LGN receives its greatest input from the retina.c. In the primary visual pathway the number of synaptic sites between, but not including the retina and the initial cortical destination, is one.d. Most of the output from the LGN goes to the pulvinar. e. The majority of retinal output feeds directly to the primary visual cortex.

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