O21009SciAmerHWClocks

O21009SciAmerHWClocks - Homework due 2/10/09 Name _ Wright,...

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Homework due 2/10/09 Name _________________________________ Wright, K. (2004). Times of our lives. Sci. Amer. 42-49. 1. How long a period of time would be timed by an endogenous interval timer. Name some behaviors that are timed by such an endogenous clock. 2. What exactly is the striatum (look it up with Google). How do the cortex, striatum, substantia nigra, and thalamus participate in the workings of the interval timer? How is dopamine involved in the initial learning of the interval being timed and in the subsequent timing after the interval is learned? 3. Describe how the following situations are thought to affect the workings of the interval timer and why a. Parkinson’s Disease b. Marijiuana intoxication c. Cocaine or Amphetamine intoxication d. Sympathetic arousal in a dangerous situation e. Attention Deficit Disorder 4. Are there workarounds when the endogenous interval timer is not working properly? Describe the flexibility and accuracy of the endogenous interval timer. 5.
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O21009SciAmerHWClocks - Homework due 2/10/09 Name _ Wright,...

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