Sleep Flashcards
Which brainwaves indicate high levels of awareness?
Beta waves
Which brainwaves indicate a relaxed yet alert state?
Alpha
Which brainwaves indicate low levels of awareness?
Theta
Which brainwaves indicate the lowest levels of alertness?
Delta waves
What are the frequency and amplitude of Beta waves?
High frequency
Low amplitude
What are the amplitude and frequency of Delta waves?
Low frequency
High amplitude
What is a circadian rythm?
A biological cycle with a duration of 24 hours.
Which part of the brain regulates the sleep wake cycle?
Superchiasmatic nucleus (SCN) - Hypothalamus
What is an ultradian rhythm?
A biological rhythm that has a frequency of less than 24 hours (e.g. pulse, blinking)
In terms of stages, what does a single sleep cycle look like?
123432REM23432REM
What percentage of our time as adults is spent in NREM sleep?
80%
What percentage of our time as adults is spent in REM sleep?
20%
What is a parasomnia?
An event which occurs during sleep that is considered abnormal
(sleep walking, movement, nightmares etc)
What is dysomnia?
A disorder of sleep cycles which cause problems getting to or maintaining sleep.
(insomnia etc)
What is the role of cognitive behavioural therapy?
encourages individuals to substitute unhealthy thoughts and behaviours with healthier ones
What are examples of sleep disorders?
Jetlag
shift work disorder
What is one key difference in sleep between adults and adolescence?
During adolescence, the timing of melatonin secretion peaks later in the 24 hour cycle 1-2 hours later than normal
What is a symptom of REM deprivation?
- poor concentration
- poor memory
- irratability
- hallucinations
what percentage of an infants REM/NREM cycle is REM
50%
