Resoration Theory Flashcards

1
Q

Growth hormone

A

This is secreted during SWS. It enables protein synthesis and cell growth. Sassin found that when sleep-wake cycles are reversed. Showing GH is controlled by neural mechanisms. Further evidence comes from research which found that the amount of GH correlates with the amount of SWS. And the decline of GH also has been associated with reduced SWS.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Oswald said what?

A

That all sleep is essential for repair and restoration. With REM enabling brain recovery and memory consolidation. SWS releasing growth hormone that stimulates growth. And NREM is a time for replenishing the body. Sleep is an ideal time to remove waste and to restock/replenish its levels of neurotransmitters and to synthesize proteins.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Body weight

A

Oswold’s theory is supported by correlational research conducted by Adam who found there was a correlation between sleep time and body mass. If you have more body mass, you are likely to have higher sleep time. However, this research is correlational and doesnt account for a third variable which may be apparent.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Oswolds theory is also supported by Rechtschaffen

A

who found that rats who were spun on a turntable to prevent them from sleeping often dies of at least suffered ulcers and internal bleeding. However, this could be due to other factors sch as the stress of it.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Oswold is also supported by Lugaressi

A

who studied a man who could hardly sleep due to damage in the brain. He couldn’t function properly and eventually died. However, anxiety could cause the lack of sleep due to his condition.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Shaprio also supported Oswold

A

He provided further support. He studied marathon runners. It was found they slept for 90 minutes longer over the next 2 nights because more repair work was needed on their bodies. NREM sleep increased while REM decreased.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

There is a lack of support for lack of exercise reducing the amount of deep sleep

A

The model would predict this but there is a lack of support. A study by Ryback and Lewis got students to spend 6 weeks in bed and observed no change in their sleep patterns

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the main difference between Oswold and Horne?

A

Horne believes that body restoration is not the only function of sleep but instead this occurs during periods of wakefulness, leaving core sleep to provide for the restoration of brain systems,

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is a limitation of Oswold using amino acids?

A

Amino acids stay in out bodies for 4 hours after we consume them as protein. So why do we need to sleep for so long if proteins are only used for 4 hours. For more than restoration purposes?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How is Peter Tripp used as a strength of Oswold?

A

He stayed awake for 8 days and nights, he experienced a drop in body temperature, hallucinations,losing hold on reality, hearing voices and being unable to recover his sense of gravity. However, demand characteristics could have played a part which him conforming to side effects hes been told he might experience and because it is a case study, you cannot generalise.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the link between Oswold and Horne?

A

Randy Gardner spent 11 days with no sleep and suffered nowhere near the same effects Tripp did. His symptoms were only psychological. Horne build off Oswold’s theory to include REM restoration where neurotransmitters are replenished. During deprivation, problems in perception, memory and attention would be explained by loss of these neurotransmitters. However, highly motivated individuals act differently and so this might account for the differences in Tripps and Gardners studies.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Horne

Core and Optional sleep

A

Horne distinguishes between core and optional sleep. Core sleep appears to be present and essential in all species whereas optional appears to not be so vital.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Horne

REM sleep is essential

A

Dement deprived volunteers either of REM sleep or NREM sleep and observed the consequences, He found that REM deprivation was most dramatic with participants becoming more aggressive ans having poor concentration. He also reported REM rebound effects e.g. going straight into REM sleep when given the chance. By the 26th night, thy were averaging 26 attempts per night to enter REM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Horne REM sleep is essential-cats

A

Jouvet placed cats on an upturned flower pot in water. When the cats fell into REM sleep, their muscles would relax and they would fall in the water waking them up. After numerous times, the cats became conditioned. On reaching REM, they would wake up before falling into the water. Eventually all the cats died. However, could thus just be due to lack of REM sleep or stress due to falling in the water?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Horne- baby’s sleeping patterns

A

A baby spends around 50% of its sleep in REM sleep, consistent with the uses its needed for brain development and growth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Horne- antidepressants

A

Those who suffer from depression have an imbalance of neurotransmitters in the brain. Anti-depressants are used to replenish the amount of neurotransmitters which means an increase in dopamine and serotonin is apparent. If this theory were true, it would mean the person would have no REM sleep supporting REM is where neurotransmitters are replenished

17
Q

Horne-brain injury

A

Following brain damage, patients spend longer in REM sleep for an average of 6 weeks. Suggesting time is being spend repairing.

18
Q

Further criticism

A

A woman reporting to have 1hr of sleep per day and a man reporting to have just 15 minutes with little REM report no ill effects

19
Q

Issue, approaches and debates

A

Even though sleep is universal throughout the animal kingdom, studies of dolphins have shown no REM sleep. If it is valid to sleep, why don’t Dolphins need it?

20
Q

What are 5 supporting research of Oswold?

A
Body mass-Adam
Rats-Rechtschaffen 
Brain damage-Lugaressi
Marathon runners-Shapiro 
Peter Tripp
21
Q

What are 2 limitations of Oswold?

A

Lack of exercise reducing sleep

Amino acids

22
Q

What are 3 strengths of Horne

A

Core and optional sleep
REM sleep is essential
REM sleep is essential-cats

23
Q

What are 2 criticisms of Horne?

A

Women and man reporting 1 hour/15 mins of sleep

Ida