QuestionSBA
QuestionChoice
The phenomenon described is a sleep disorder known as sleepwalking or somnambulism. Sleepwalking usually occurs during the deepest stage of non-rapid eye movement (NREM) sleep, in N3 (slow-wave sleep), rather than during the initial sleep onset (N1) stage, which is a lighter stage of sleep.
10025302
c
Stage 1 of NREM
QuestionChoice
The phenomenon described is a sleep disorder known as sleepwalking or somnambulism. Sleepwalking typically occurs during non-rapid eye movement (NREM) sleep, specifically in the stage of N3, which is also referred to as slow-wave sleep. N3 is the deepest stage of NREM sleep and is associated with reduced arousal thresholds, making it more likely for sleepwalking episodes to occur during this phase.
10025300
a
Stage 3 of NREM
QuestionChoice
The phenomenon described is a sleep disorder known as sleepwalking or somnambulism. During wakefulness, the brain is in a state of consciousness. By contrast, sleepwalking is a disorder in which individuals engage in complex behaviours during sleep without conscious awareness. Therefore, sleepwalking usually occurs during the deepest stage of non-rapid eye movement (NREM) sleep, in N3 (slow-wave sleep). The reduced arousal thresholds make it more likely for sleepwalking episodes to occur during this phase.
10025304
e
Wake stage
QuestionChoice
The phenomenon described is a sleep disorder known as sleepwalking or somnambulism. Sleepwalking usually occurs during the deepest stage of non-rapid eye movement (NREM) sleep, in N3 (slow-wave sleep), rather than the N2 stage, which is relatively lighter.
10025303
d
Stage 2 of NREM
QuestionChoice
The phenomenon described is a sleep disorder known as sleepwalking or somnambulism. Sleepwalking typically occurs during non-rapid eye movement (NREM) sleep, specifically in the stages of N3. By contrast, REM sleep is a distinct phase characterised by rapid eye movements, vivid dreaming, and temporary large muscle paralysis to prevent acting out dreams.
10025301
b
REM
Concept
Chapter
2693
4310
Phases of sleep
Topic
152
Neuroscience
17458
A 66 year old man attends his GP surgery with his wife due to a concerning pattern of behaviour. The patient's wife reports that he has started getting out of bed at night and walking around the house without seeming to wake up. These episodes are becoming extremely disruptive to the rest of the household, and they are worried that he may fall down the stairs. The patient has no memory of these episodes upon waking, but notes he does feel very tired.

In which of the following sleep phases is this phenomenon most likely to occur?
a