Importance of sleep to mental wellbeing chap 8

• Partial sleep deprivation: the experience of achieving inadequate sleep in terms of quality or quantity
• Affective functioning: a persons experience of their emotions
• Behavioural functioning: a persons observable actions
• Cognitive functioning: a persons mental processing
• circadian rhythm sleep disorders: a category of sleep disorders in which sleep is disrupted because the circadian rhythm and a persons sleep-wake schedule are misaligned
• Bright light therapy: a therapy to treat a sleep disorder in which the person is exposed to a bright light to reset the sleep-wake cycle
• Delayed sleep phase syndrome (DSPS): a Circadian rhythm sleep disorder characterised by a delay in the timing of sleep onset and awakening compared with the timing that is desired
• Advanced sleep phase disorder (ASPD): a circadian rhythm sleep disorder characterised by an advance in the timing of sleep onset and awakening compared to the timing that is desired
• Shift work: work that regularly takes place outside of normal business hours, particularly at night and the very early morning; can cause a circadian rhythm sleep disorder
• Sleep hygiene: the sleep related behaviours and environmental conditions that are beneficial for sleep
• Zeitgeber: an environmental cue such as light, temperature, and eating water patterns that can synchronise and regulate the body’s circadian rhythm
• Blue light: a part of the visible light spectrum that is emitted from smartphone screens, computers, monitors, tvs, LED and fluorescent light bulbs, as well as sunlight
• Daylight: all direct and indirect sunlight during the daytime