Consciousness

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Across
  1. 4. Theory of sleep's purpose.
  2. 6. Sleepwalking behavior.
  3. 8. Gland producing melatonin.
  4. 11. Stimulant drugs.
  5. 13. Sleep terror.
  6. 14. Mood disorder tied to seasons.
  7. 15. Natural body rhythm.
Down
  1. 1. Dream theory; brain activity.
  2. 2. Brain wave in waking.
  3. 3. Stimulant drug.
  4. 5. Sleep cycle period.
  5. 7. Dream's storyline.
  6. 9. Difficulty falling asleep.
  7. 10. Attending to one ear.
  8. 12. Inability to move when waking.