Sleep Flashcards
What is consciousness?
The level of awareness a person has of their thoughts, feelings, perceptions and existence.
What is the consciousness continuum?
A visual representation of the different states of consciousness that progress from lower levels of awareness to high levels.
What is normal waking consciousness?
A state of consciousness when the person is awake and aware.
What is altered states of consciousness?
Any state of consciousness that is distinctively different from normal waking in terms of quality of experience and level of awareness.
What is a hypnogram?
A graph that represents the time period of each stage of sleep and the transitions between each stage.
What is sleep?
A regular and naturally occurring altered state of consciousness that involves a loss of awareness and disengagement with eternal and internal stimuli.
What is a sleep cycle?
A around 90 minute sleep episode where a person progresses in stages of REM and NREM before repeating.
What is Rapid Eye Movement? (REM)
REM is a type of sleep that is categorized by rapid eye movement, high levels of brain activity and low levels of physical activity.
What is Non-rapid Eye Movement? (NREM)
NREM is a type of sleep that is categorized by a lack of rapid eye movement, and subdivided into three different stages.
What is a Electroencephalograph? (EEG)
A device that detects, amplifies and records the electrical activity of the brain.
What is a Electromyograph? (EMG)
A device that detects, amplifies and records the electrical activity of the body’s muscles.
What is a Electro-oculograph? (EOG)
A device that detects, amplifies and records the eletrical activity of the muscles responsible for eye movement.
What is a sleep diary?
A record that contains self reported descriptions of their sleeping periods, including an estimation of time spent sleeping and judgments they make about quality and nature of sleep.
What is video monitoring?
The use of camera and audio technologies to record a person as they sleep.
What are biological rhythms?
Repeated biological processes that are regulated by internal mechanisms.
What are circadian rhythms?
Biological and behavioral changes that occur as part of a cycle that lasts around 24 hours.
What are ultradian rhythms?
Biological and behavioural changes that occur as part of a cycle that under 24 hours
What is the sleep-wake cycle?
A 24 hour cycle that is made up of time spent sleeping and time spent awake and alert.
What is melatonin?
A hormone that is released by the pineal gland, typically released at night to induce sleep.
What is suprachiasmatic nucleus? (SCN)
A structure in the hypothalamus that regulates an individuals sleep-wake patterns.
What is the pineal gland?
A gland in the brain that is responsible for the production and release of melatonin.
What is sleep deprivation?
The inadequate quality and/or quality of sleep.