reviewexam2

reviewexam2 - 1 Define sensation and perception 2 Provide...

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1. Define sensation and perception. 2. Provide specific examples that prove that perception is not perfect copy of the physical world. 3. Is it possible to have sensation without perception-provide evidence. Is it possible to have perception without sensation-provide evidence. 4. Be sure you can identify the 6 senses, their receptors, the process by which the receptors turn physical stimuli into graded or action potentials, the path to the cortex (indicating where synapses occur) and some indication of how coding occurs for some aspect of the stimuli. Know vision, olfaction, and somatosensation in more detail than the others. 5. Know the general properties of sensory systems and be able to give at least 2 examples (from at least 2 sensory systems) for each general principle. • Law of specific nerve energies also called labeled lines • Sensory systems respond best to change and stop responding (adaptation or habituation) when stimulus is unchanging. • Some coding is done at lower (prior to cortex) levels of processing • Representations of the sensory world are mapped in an organized fashion (topographically) in the pathway and in the cortex (somatotopic, retinotopic, etc.) • Reorganization of cortex after loss of input. Adjacent neurons sprout and make new synapses after damage. • Parallel paths within a sensory system • Neural “tuning” of perception/pathway during development 6. What is synesthesia and what common property does it violate? How might it occur? 7. Why might odors evoke such vivid autobiographical memories? 8. What is the secondary olfactory system? How does it differ from the primary system? 9. How does coding occur in the olfactory bulb for different odors? 10. How is olfaction similar to other sensory systems? Different? 11. What do visual receptors respond to? 12. How do rods and cones differ? Where are they located in the retina? How is color vision coded in the retina and later in the cortex? 13. How can a hyperpolarizing graded potential stimulate the release of neurotransmitters? 14. What’s lateral inhibition, how does it work and what is it good for? 15. How is the visual field distorted as it moves along the visual pathway? What is expanded, and what is condensed? What is foveal vision and what is the blind spot?
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This note was uploaded on 05/31/2009 for the course PSYCH 91 taught by Professor Williams during the Spring '07 term at Duke.

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reviewexam2 - 1 Define sensation and perception 2 Provide...

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