The Nature of sleep and lifespan changes

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C K E P L E Y V N G R O D S J B F
T G E P S W O F N X S J C F X A B
B E V Y P Q T E Q T V H S E S J T
P R V T I O F W L S I E E T E T G
R U C V S E Y U E L N K N A C H S
J T R M I E D I D O P E S W H C R
O A U U R A B R M I C S E E E N Y
N M G C I A E R R S E V Y E D A V
H M R H B N O K E N I B W I U W S
B I L F X H N L L T G R L A T V L
Q U U M D T O L P I E A K T U G T
W Q I K L D I A P D B E D V U I N
Y F J G A P D O L R P M A Q M A V
R P H E H A M O Q A I J Q Y D O Y
H U M P H C Y P W Y I H O U Q U P
A Q O R V O I E E Y R V K S W J M
H T W P Y D K N V O A J O O T N G

Clues

  • _____ people still sleep 8 hours, 20% of their sleep is REM, SWS sleep decreased but other NREM sleep increases (5)
  • _______ sleep 9-10 hours, they sleep later and struggle to wake up early, (11)
  • ________ sleep 8 hours, 25% of their sleep is REM, sleep walking is rare but insomnia and sleep apnoea is more likely (6)
  • _____________ sleep approximately 12 hours, they have similar brain patterns to adults, 30% of their sleep is REM (8)
  • ______________ sleep 16 hours, SWS is quiet and REM is active sleep, they have shorter cycles than 90 minutes, approximately 50% of their sleep is active sleep. (6)
  • babies have an _________ brain. This could explain why babies have high levels of REM sleep because REM is associated with consolidating memories. Even more proof comes from the fact premature babies (even more immature brains) have 90% REM sleep (8)
  • Babies sleep patterns could have been what? This is because their parents could carry on with their usual activities and the babies could feed often (8)
  • Reduced sleep in old people could be because of other factors rather than physiological changes. These factors could include reduced SWS levels, sleep apnoea and ? (7)
  • Teenage what are released at night? This would disturb their sleep and make them moody and irritable. These are the symptoms associated with puberty. (8)
  • Who found that too much sleep makes the mortality rate increase? (6)

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