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Flashcards in Biological rhythms Deck (16):
1

What are circadian rhythms?

Biological rhythms that last aprox. 24 hours

2

Who spent six months in a cave and what did he find?

Siffre found that light was essential for the 24 hour sleep/wake cycle

3

What are endogenous pacemakers?

Rhythms from internal body systems that regulate biological rhythms

4

What are exogenous zeitgebers?

External cues from the environment that affect biological rhythms

5

What is the most influential endogenous pacemaker?

Suprachiasmatic nucleus

6

Where is the SCN and what does it do?

The middle of the brain, connected to the hypothalamus; controls biological rhythms

7

What suggests that the SCN has an evolutionary feature?

It is found in animals as well as humans

8

What is entrainment?

An adjustion of the body clock to fit with the environment

9

Who gave light-therapy to mothers of premature babies and found it improved their sleep quality?

Shih-Yu Li

10

What are infradian rhythms?

Biological rhythms that last longer than 24 hours

11

Who found that pheremones from a woman at the beginning or end of her menstrual cycle could lengthen or shorten another woman's cycle?

McClintlock

12

What are ultradian rhythms?

Biological rhythms lasting less than 24 hours

13

Give an example of a circadian rhythm

The sleep/wake cycle

14

Give an example of an ultradian rhythm

A sleep cycle

15

Give an example of an infradian rhythm

The menstrual cycle

16

Who found that people dream during REM sleep using an EEG?

Dement and Kleitman