ultradian rhythms Flashcards
1
Q
ultradian rhythms
A
- biological rhythms that last less than 24 hours
- sleep stages, each cycle lasts between 90-100 mins, has a distinctive EEG wave pattern
2
Q
sleep stages - stage 1
A
- 4-5%
- light sleep
- muscle activity slows
- occasional muscle twitching
3
Q
sleep stages - stage 2
A
- 45-55%
- breathing pattern and heart rate slows
- slight decrease in body temp
4
Q
sleep stages - stage 3
A
- 4-6%
- deep sleep
- brain generates slow delta waves
5
Q
sleep stages - stage 4
A
- 12-55%
- very deep sleep
- rhythmic breathing
- limited muscle activity, brain produces delta waves
6
Q
sleep stages - stage 5
A
- 20-25%
- rapid eye movement
- brainwaves speed up, dreaming occurs, muscles relax, heart rate increases
- breathing rapid and shallow
7
Q
evaluation - tucker et al
A
- pps studied over 11 days in strictly controlled lab environment
- consistent individual differences found in sleep duration, time to fall asleeo and amount of time in each stage
- differences were not driven by environmental setting, biologically determined `
8
Q
evaluation - ericson et al
A
- studied elite performers
- violinists limit practice to 90 mins and frequently nap to recover
- finding consistent with view that fatigue is a characteristic at the end of the BRAC cycle
- finding replicated in other elite performers
