Chapter 7: Importance of sleep to mental wellbeing

• Sleep Deprivation


  Inadequate quantity and/or quality of sleep.
• Full Sleep Deprivation 


  No sleep within a 24-hour period.
• Partial Sleep Deprivation 


  Sleeps for some duration within a 24-hour-period, but the the quantity is low and the quality is poor.
• Affective Effects 


  The changes in emotions and emotional responses that arise from sleep deprivation.
• Cognitive Effects


  The changes in mental process that arise from sleep deprivation.
• Behavioural Effects


  The changes in actions and the ability to control them that arise from sleep deprivation.
• Blood alcohol concentration (BAC) 


  A measure of how much alcohol is in a person's bloodstream.
• Sleep Disorder


  Disturbances to typical sleeping and waking patterns.
• Circadian Rhythm Sleep Disorders 


  Sleep disorders that interfere with the typical regulation of the circadian rhythm of sleep, leading to change in the sleep-wake cycle.
• Delayed sleep phase syndrome (DSPS)

  A type of circadian rhythm sleep disorder in which sleep and waking occur later than usual.
• Advanced sleep phase disorder (ASPD)

  Type of circadian rhythm sleep disorder in which sleep and waking occur earlier than usual.
• Shift Work 


  An occupations that involves working at unsual hours, such as working overnight.
• Bright light therapy 


  A method used to adjust a person's circadian rhythm through exposure to a high-intensity light source.
• Sleep Hygience


  The practices and habits that promotes an individual's sleep patterns.
• Mental Wellbeing 


  Individual's psychological state, involving their ability to think, process information, and regulate emotions.
• Blue Light 


  Type of light that can be emitted both naturally and artificially.
• Daylight 


  The typical light an individual is exposed to during the day, and is mostly natural blue light.
• Temperature


  Degree of external heat in the environment that can influence the quality and quantity of sleep.
• Eating and drinking patterns

  What, when, and how much food and drink is consumed by an individual.
• Zeitgebers


  External cues from the environment that influences the circadian rhythm.