sample_midterm_3_2005

sample_midterm_3_2005 - YOUR NAME Student ID MIDTERM 3...

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YOUR NAME__________________________ Student ID#_________________ 1 NPB 100 MIDTERM 3 SPRING, 2005 Your signature______________________ Question Score Total 1 15 2 9 3 12 4 5 5 6 6 4 7 18 8 14 9 17 TOTAL 100
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YOUR NAME__________________________ Student ID#_________________ 2 Question 1 (15 points) In class you saw the Hermann Grid illusion shown below on the left . When you looked at the black squares separated by white spaces you saw illusory dark spots at the white intersections. 1a. (5 points) Using center-surround OFF-center receptive fields, illustrate on the figure below on the right how OFF-center receptive fields can cause this illusion. THIS IS THE ILLUSION YOU SAW DRAW YOUR RECEPTIVE FIELDS HERE BLACK BLACK BLACK BLACK Illusory dark spot BLACK BLACK BLACK BLACK 1b. (10 points) Explain your answer. GO ON TO THE NEXT PAGE!
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YOUR NAME__________________________ Student ID#_________________ 3 Question 2 (9 points) The following diagram shows 3 possible lesions through the visual pathway. Lesion 1 represents a cut all the way through the right optic nerve. Lesion 2 represents a cut all the way through the right optic tract. Lesion 3 represents a cut through the optic chiasm which cuts contralaterally projecting axons from each eye, and does not cut ipsialterally projecting axons from either eye. Left eye Right eye 1 2 3 2a. (3 points) If you lesion the optic nerve only at location 1, and you close your left eye, how will you perceive the world only using your right eye? a) Normal vision through the right eye b) No vision (blind in the right eye) c) Only perceive left visual field through the right eye d) Only perceive right visual field through the right eye 2b. (3 points) If you lesion the optic tract only at location 2, and you close your left eye, how
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sample_midterm_3_2005 - YOUR NAME Student ID MIDTERM 3...

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