6) What is NOT TRUE about Lesioning? 6) A) Temporary Lesioning stops aactivity i

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6) What is NOT TRUE about Lesioning? 6) A) Temporary Lesioning stops aactivity in part of the brain with the help of Cooling Plates B) Lesioning is perfectly safe because the surgeon can easily see the distinct boundaries of C) Lesioning is a surgical procedure that removes target area in the visual system and D) There is strong evidence that the brain changes in response to lesioning and there can be places on the surface or inserted into the brain. the brain areas. compares vision before and after surgery rerouting of nerves. 7) What is NOT TRUE about the Lateral Geniculate Nucleus? A) The strongest input into the LGN is from the retina, rather than the cortex to which the LGN sends its output. B) The strongest input to the LGN comes "top-down" from the visual cortex, rather than "bottom-up" from the retina. C) Properties of the LGN cells look very much like the properies of the retinal ganglio cells D) The LGN might be important in filtering what information gets trhough to the cotex 8) The visual illusion called the Hermann Grid 8 A) has no explanation based on retinal processes. B) is explained by "top down, bottom up" processing. C) can be explained by lateral inhibition. D) is explained by"dark adaption. 9) Which is NOT true of the lens? 9 A) It does the majority of focusing. C) It has curved surfaces. B) It is denser than surrounding materials. D) It slows light upon entry

Explanation / Answer

6. C) Lesioning is a surgical procedure that removes target area in the visual system and compares vision before and after surgery

This option is not a part of leisoning since, the process of leisoning is such that there would be no removal of tissues, rather tissues will only be destroyed.

7. B) the strongest input to the LGN comes “top down” from the visual cortex, rather than “bottom up” from the retina

This is incorrect since, the relay cent-re of the lateral geniculate nucleus is present inside the thalamus. Her, most of the sensory input comes from the retina.

8. C) is explained by lateral inhibition

This is an optical illusion that is explained by the process of lateral inhibition. This is because at a single point, the visual system might not be because of one receptors, but as a result of a number of receptors which would be responding to these stimuli and their presentations.

9. B) it is denser than surrounding materials.

The lens is not denser than the sclera.

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