Exogenous Zeitgebers Flashcards
What is an exogenous zeitgeber?
An environmental cue, such as light, that helps to regulate the biological clack in an organism.
What are exogenous zeitgebers responsible for?
Entraining the biological clock of an organism.
What is the most important zeitgeber for most
Light.
What does light do each day?
Resets the internal biological clack each day, keeping it on a 24-hour cycle.
As well as light, what other exogenous zeitgebers are there?
Social cues.
What are some examples of social cues that are examples of exogenous zeitgebers?
Mealtimes and social activities.
What is the general point to use as evaluation for exogenous zeitgebers?
Practical application: using light exposure to avoid jet lag.
What is the point to use when evaluating exogenous zeitgebers?
By understanding the role that exogenous zeitgebers have on our sleep makes up able to decrease the impacts jet lag has on our sleepwalk cycle.
Who did eat research into jet lag and exogenous zeitgebers?
What did he find?
What happened within the 3 volunteer groups?
What were the three shifts their circadian rhythm?
Burgess.
Found that exposure to bright light poor to an East to West flight decreased the time needed to readjust to local time on arrival.
1 - Continuous bright light - 2.1 hours.
2 - Intermittent bright light. - 1.5 hours.
3 - Dim light. - 0.6 hours.
