MIT9_14S09_prob21

MIT9_14S09_prob21 - 9.14 MIT Spring 2009 Class#21-23...

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9.14, MIT, Spring 2009 Class #21-23 Questions based on Schneider chapters and lectures: 1. The last major retinal projection to be discovered was the retinohypothalamic projection. It was probably the first to evolve. Why is this connection so important? 2. The pineal gland received direct visual input early in vertebrate evolution. Describe the much less direct connection to this gland from the retina in present-day mammals. 3. What was very likely the first important function of visual image detection? It is likely that this function resulted in a change from bilateral visual inputs to a dominance of inputs from the contralateral side. What descending connection to the motor system made this change adaptive? 4. The pretectal nuclei are involved in some protective responses to visual inputs, but orienting responses required greater acuity. What midbrain structure controls such responses? What kinds of plasticity occur in this structure? 5. Name the five main optic-tract termination areas in the order they are reached by the optic tract. What additional areas receive sparse retinal projections?
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MIT9_14S09_prob21 - 9.14 MIT Spring 2009 Class#21-23...

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