Multiple Choice Identify the choice that best completes the statement or answers
ID: 208843 • Letter: M
Question
Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Complex Cells in Area V1 respond best to bars of a particular orientation, and with similar strength to bars of any length no matter how much of the recptive field the bar covers. are Phase Sensitive respond similarly to preferred orientated lines and bars wherever they appear on their receptive fields. All the above describe accurately, some aspect of Complex Cells. a. b. c. d. 2. What is not true about llusory Contours? a. They are visual illusions that defy any explanation. b. Cells in the primary visual cortex are known to respond to these contours the same c. If the illusory contour is not enough in the excitatory part of the receptive field, it d. In the illusory contour, the illusory shape seems brighter than the background a. Magnocellular cells and Parvocellular cells are projected to different layers.in VI way they respond to faint real lines. will not be noticed. 3. AllL except the following statements about the primary visual cortex are true Input from the contralateral eye and the ipsilateral eye are combined before being sent to the primary visual cortex from the LGN Information is sent back to the LGN from layer 6 of Vi Different layers receive information from and transmit information to other areas of the brain b. c. d. 4. Cortical magnification a. refers to an overrepresentation of central visual regions b. creates an optical illusion. c. refers to an overrepresentation of peripheral visual regions. d. can explain perceptual distortions. 5. Simple Cells in Area V a. have receptive fields that are side by side elongated rectangles-all with one ON and b. show preference for lines of one orientation over others- with strongest response c. are cortical receptive fields that have either two inhibitory or two excitatory d. have receptive field ON and OFF regions very similar to the receptive fields found in one OFF region to detect bars and edges to vertical lines and bars. regions that respond best to bars of the correct orientation the LGN. The only difference is that the receptive fields in V1 do not repond to tilted linesExplanation / Answer
Answer 1 d. All the above describe accurately, some aspects of complex cells.
-Have no clear division of excitatory and inhibitory regions inside their RFs
-a bar with width about one third to one half of the width of the RF in the optimal orientation of the cell will evoke maximal response, independent of where it is placed inside the RF.
-a stimulus with uniform intensity covering the entire RF will evoke no response.
-The third type of cells found in the blobs in layer 3 are monocular and sensitive to color, and have color-opponent center-surround circular RFs. They are insensitive to orientation.
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