After reading this chapter, you will be able to

15.1 Summarize the characteristics of the rhythms that occur during sleep and waking.
15.2 Describe the neural controls of sleep and waking rhythms.
15.3 Examine the functions of sleep and shorter rhythms.
15.4 Assess the causes of sleep disorders.
15.5 Explain how researchers are approaching the issue of consciousness.
15.6 Indicate the neural processes that contribute to consciousness.