AQA PSYA3 - Biological Rhythms - Restoration Theory of Sleep

HideShow resource information

Restoration Theory

States that the function of sleep is to restore physiological systems that are active in the day time - especially the brain. Two restoration theories are Oswald and Horne.

Oswald, (1980)

States that REM is for restoration of the brain and NREM is for restoration of the body

  • Evidence for: 
    • Damage to the brain results in an increase in the amount of REM
    • Skin cells grow more quickly in NREM
    • Growth hormone is secreted during SWS.
    • Marathon runners have more NREM after a race (Shapiro et al 1981)
    • Babies spend more time in REM (brains are developing) and release more growth hormone in SWS (bodies are growing rapidly).
  • Evidence against:
    • Horne and Minardi (1985) found that we fall asleep faster after exercise, but do not sleep for longer.
    • Body repair in NREM would depend on nutrients from evening meal, however they're only available for 6 hours after eating.

Horne (1998)

States that both REM and stage 3 & 4 of NREM (SWS) are for brain restoration.

He also suggests that REM and SWS NREM make up 'core sleep', and that light NREM is 'optional sleep', with the…

Comments

No comments have yet been made

Similar Psychology resources:

See all Psychology resources »See all Sleep resources »