Biological rhythms research

Question 1

Siffre

Answer 1

Role of light as EZ in sleep wake cycle
Stayed in cave for 6mths with no cues of time of day/light- monitored cycle- was erratic at first but regulated to 25hrs due to EPs.

Question 2

Bovin

Answer 2

Research into shift work found at 6am there was a lack of concentration and high levels of mistakes made by workers- shows how workers should be managed

Question 3

Knutton

Answer 3

Research foun night shift workers were 3x more likely to develop heart disease and health problems due to poor sleep schedule/quality

Question 4

Aschoff and weaver

Answer 4

Small group of pps in WW2 bunker- no light/social cues- sleep wake cycle between 24-27hrs.

Question 5

Duffy

Answer 5

Found morning people go to bed and rise early (6am+10pm) whilst evening people go to bed and ride late (10am and 1am) meaning they had different image rhythms

Question 6

Ralph

Answer 6

Mutant hamsters bred to have 20 hr sleep wake cycle- SCN removed and transplanted into normal Hamsters- sleep wake changed from 24 to 20 hrs

Question 7

Campbell and murphy

Answer 7

Pps woken up at various points in night and had light pad shone on back of knees causing sleep wake cycle to deviate by 3 hrs

Question 8

Miles

Answer 8

Young man blind from birth had sleep cycle of 24.9 hrs- failed to change it to 24 using social cues so had to take sedatives to regulate it to world

Question 9

Dement and Klietman

Answer 9

9pps monitored by EEG- found 5 distinct sleep stages with different levels of brain activity- 79% dreams during REM