Sleep

2. This is the deepest sleep stage (4)
3. These waves are medium amplitude medium frequency waves found mainly in adults who are meditating or very relaxed; very drowsy or sleeping (5)
5. What are we most likely to do during REM sleep? (5)
9. This measures electrical activity of the eyes (3)
10. These waves are high amplitude low frequency waves found mainly in adults who are in a deep sleep (5)
11. Stages 1 - 4 are known as …… (4)
13. What happens to our muscles in REM sleep? (9)
14. We spend approximately ……. of our lives sleeping (3 5)
16. In the hypnagogic state we may feel like we are … (7)
17. These waves are medium to low amplitude medium frequency waves found mainly in adults who are awake but relaxed (5)

1. The rhythms which lasts approximately 24 hours (9)
4. A process within an organism (10)
6. The rhythms which are shorter than 24 hours e.g. sleep-cycle (9)
7. It is in this stage that people may experience sleep talking sleep walking or night terrors (5)
8. These waves are low amplitude high frequency waves found mainly in adults who are awake & alert (4)
9. This measures electrical activity of the muscles (3)
12. During Stage 2 there are short bursts of brain activity called ….. (8)
15. This measures changes in electrical activity in the brain and consists of electrodes attached to the scalp (3)