Chapter 5 Definitions

Question 1

chronic sleep deprivation

Answer 1

not getting enough sleep over an extended period of time, long term sleep deprivation

Question 2

microsleep

Answer 2

a brief involuntary period of sleep that occurs in the midst of a wakeful activity - we tend to drift off and stop concentrating on what we are doing

Question 3

partial sleep deprivation

Answer 3

having some sleep in a 24 hour period but not getting enough to meet your needs; may occur for just during one night or for several nights and can lead to serious consequences

Question 4

REM rebound

Answer 4

the significantly larger amount of time spent in REM sleep than usual that follows a period of being deprived of REM sleep

Question 5

sleep debt

Answer 5

the difference between the amount of sleep you should be getting and the amount you actually get

Question 6

sleep deprivation

Answer 6

not getting the amount of sleep needed’ may involve partial or total loss of sleep

Question 7

sleepy deprivation psychosis

Answer 7

the experience of being depersonalised with a loss of sense of personal identity and increased difficulty with coping with other people and the environment, usually occurs at day 6 of total sleep deprivation

Question 8

the ‘hat’ phenomenon

Answer 8

a feeling of tightening around the head as though a hat that is too small is being worn that usually occurs during day 4 of total sleep deprivation

Question 9

total sleep deprivation

Answer 9

going without sleep for an entire 24 hour period; may occur of just during one night or for several nights and can lead to serious consequences