1. Figure 28.1 The duration of sleep

2. Figure 28.1 The duration of sleep (Part 1)

3. Figure 28.1 The duration of sleep (Part 2)

4. Figure 28.2 Circadian rhythmicity of core body temperature and growth hormone & cortisol levels

5. Box 28A Sleep Styles in Different Species

6. Box 28A Sleep Styles in Different Species (Part 1)

7. Box 28A Sleep Styles in Different Species (Part 2)

8. Figure 28.3 Consequences of total sleep deprivation in rats

9. Figure 28.3 Consequences of total sleep deprivation in rats (Part 1)

10. Figure 28.3 Consequences of total sleep deprivation in rats (Part 2)

11. Figure 28.4 Rhythm of waking and sleeping in isolation, with and without day–night cycle cues

12. Figure 28.5 Photoreceptors responsible for signaling circadian light changes

13. Figure 28.5 Photoreceptors responsible for signaling circadian light changes (Part 1)

14. Figure 28.5 Photoreceptors responsible for signaling circadian light changes (Part 2)

15. Figure 28.5 Photoreceptors responsible for signaling circadian light changes (Part 3)

16. Box 28B Molecular Mechanisms of Biological Clocks

18. Figure 28.6 EEG recordings during the first hour of sleep

19. Box 28C(1) Electroencephalography

20. Box 28C(2) Electroencephalography

21. Box 28C(3) Electroencephalography

22. Figure 28.7 Physiological changes during the various sleep states

23. Figure 28.7 Physiological changes during the various sleep states (Part 1)

24. Figure 28.7 Physiological changes during the various sleep states (Part 2)

25. Figure 28.7 Physiological changes during the various sleep states (Part 3)

26. Figure 28.8 Circuitry involved in decreased sensation and muscle paralysis during REM sleep

28. Figure 28.9 Activation of specific neural circuits triggers sleep and wakefulness

29. Figure 28.10 Cortical regions whose activity changes during REM sleep

30. Figure 28.11 Important nuclei in regulation of the sleep–wake cycle

31. Figure 28.11 Important nuclei in regulation of the sleep–wake cycle (Part 1)

32. Figure 28.11 Important nuclei in regulation of the sleep–wake cycle (Part 2)

33. Figure 28.11 Important nuclei in regulation of the sleep–wake cycle (Part 3)

34. Figure 28.11 Important nuclei in regulation of the sleep–wake cycle (Part 4)

35. Box 28E Drugs and Sleep

36. Figure 28.12 Thalamocortical neuron activity in sleep and awake states

37. Figure 28.13 Thalamocortical feedback loop and the generation of sleep spindles

38. Figure 28.13 Thalamocortical feedback loop and the generation of sleep spindles (Part 1)

39. Figure 28.13 Thalamocortical feedback loop and the generation of sleep spindles (Part 2)

40. Figure 28.14 Summary scheme of sleep–wake states

41. Figure 28.15 Sleep pattern of a patient with obstructive sleep apnea