Unit 3: Sleep Flashcards
What is a Beta Wave?
Beta waves are the typical brainwave pattern during normal waking consciousness associated with being alert, active, anxious and paying (selective) attention. They have a high frequency and low amplitude
What is Cataplexy?
Cataplexy (or Muscle Atonia) is the total relation of muscles to the point of paralysis in REM sleep.
What is a Circadian Rhythm?
Circadian Rhythm is a biological rhythm that occurs approximately once every 24 hour, for example the sleep wake cycle and body temperature cycle
What is Deep Sleep?
Deep sleep is stage 3 and 4 NREM sleep collectively
What are Delta Waves?
Delta waves are the typical brainwave pattern associated with deep NREM sleep. They have a steady pattern of low frequency and high amplitude.
What are Hypnogogic or Hypnic Jerks?
Hypnogogic jerks are involuntary muscle twitches that cause us to jolt. They are commonly experienced during stage 1 NREM sleep.
What is a Hypnogogic State?
Hypnogogic state is a relaxed state that occurs during the transition from being awake to being asleep, often considered to be a part of stage 1 NREM sleep.
What is a Hypnopompic State?
Hypnopompic state is the period between being asleep and waking up, a time when brainwaves are predominantly alpha waves. Vivid images (Hypnopompic images) are often seen during this time.
What are K-Complexes?
K-complexes are brainwave patterns that consist of a sharp rise and fall in amplitude, lasting for about 2 seconds on the EEG. Indicative of stage 2 NREM sleep, occurring about once a minute although can be triggered by external stimuli (such as a loud noise).
What is Muscle Atonia?
Muscle Atonia (or Cataplexy) is the total relaxation of muscles to the point of paralysis that occurs during REM sleep.
What is Non-Rapid Eye Movement Sleep (NREM sleep)?
NREM sleep is characterised by little or no rapid eye movement, and often divided into four stages that are determined predominantly by brainwave patterns.
What is Rapid Eye Movement Sleep?
REM sleep is a stage of sleep characterised by rapid movement of the eyes and dreaming.
What is the Restorative Theories of Sleep?
The restorative theory of sleep proposes that sleep allows us to recharge our bodies, recover from the physical and psychological work during the day and allow our body’s growth processes to occur.
What are Sawtooth Waves?
Sawtooth waves are associated with REM sleep. They are a special type of brainwave pattern that resemble the blade of a saw and may be found amongst the random and fast beta-like waves, especially when there is bursts of rapid eye movement.
What are Sleep Spindles?
Sleep spindles are a brainwave pattern that consist if rapid bursts of high frequency waves that are often associated with stage 2 NREM sleep but can be found in stage 3 and 4 NREM sleep.
