The Sleep Impact Quiz

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Questions and Answers

What type of waves are characteristic of alert waking activity and are characterized by sleep spindles on an EEG?

  • Theta waves
  • Beta waves (correct)
  • Alpha waves
  • Delta waves

Which type of waves are associated with sleep onset and light sleep (N1) on an EEG?

  • Delta waves
  • Theta waves (correct)
  • Alpha waves
  • Beta waves

What is the key characteristic of N2 sleep on an EEG?

  • Presence of alpha waves
  • Presence of delta waves
  • Presence of K-complexes (correct)
  • High amplitude but low frequency waves

Which theory argues that sleep keeps us safe from predators?

<p>Enhance survival/adaptation (inactivity theory) (C)</p> Signup and view all the answers

Which theory suggests that sleep is designed to restore the body of things that build up during the day?

<p>Restoration theory (D)</p> Signup and view all the answers

Which theory struggles to explain why humans need sleep, as humans have the capacity for relaxed wakefulness?

<p>Energy conservation theory (A)</p> Signup and view all the answers

What is the typical duration of sleep needed by humans?

<p>8 hours (C)</p> Signup and view all the answers

What is the characteristic of beta waves on an EEG?

<p>High frequency and low amplitude (C)</p> Signup and view all the answers

When do sleep spindles occur?

<p>N2 sleep (B)</p> Signup and view all the answers

What helps to stage REM sleep by looking at body movement on an EEG?

<p>Electromyogram (EMG) (B)</p> Signup and view all the answers

What are common issues that result from inadequate sleep?

<p>Impaired cognition (B)</p> Signup and view all the answers

What does sleep look like over the night?

<p>More N3 sleep at start of night and more REM sleep towards end of night (D)</p> Signup and view all the answers

What are the different measures of a polysomnography?

<p>Provides sleep onset latency, total sleep time, sleep efficiency, awakenings, WASO, sleep architecture (D)</p> Signup and view all the answers

What are some subjective ways of measuring sleep?

<p>Sleep diary (C)</p> Signup and view all the answers

What are the primary functions of N3 - deep sleep?

<p>Useful for memory &amp; cognition, physically restorative, synaptic plasticity, brain 'cleaning' (A)</p> Signup and view all the answers

What is the typical duration of one sleep cycle?

<p>60-90 minutes (B)</p> Signup and view all the answers

What is the role of REM sleep?

<p>Memory consolidation, emotional processing (A)</p> Signup and view all the answers

What did early work on wake prompting systems find?

<p>Mid brain (reticular formation) + parts of hypothalamus are involved in sleep + wake (D)</p> Signup and view all the answers

What is the thalamocortical loop?

<p>An ascending activating system maintains an activated cortex -&gt; runs from reticular formation to thalamus to cortex; arouses/awakens the brain' cortex projects back to thalamus forming thalamocortical loop (D)</p> Signup and view all the answers

What is the ascending (reticular) activation system?

<p>It involves two main branches: 1. cholinergic inputs (PPT and LDT) and 2. monoaminergic inputs (norepinephrine, serotonin, histamine, dopamine) (B)</p> Signup and view all the answers

What is the orexinergic system?

<p>The orexin/hypocretin pathway plays an essential role in stabilisation of wakefulness - i.e., these fire exclusively during wake (A)</p> Signup and view all the answers

What causes narcolepsy?

<p>Low waking levels of orexin i.e., caused by a reduction of orexin neurons (C)</p> Signup and view all the answers

What else does orexin control?

<p>Appetite and energy balance (C)</p> Signup and view all the answers

What part of the brain is associated with slow wave sleep?

<p>Temporal lobe (B)</p> Signup and view all the answers

Which neurotransmitter is NOT part of the ascending (reticular) activation system?

<p>GABA (B)</p> Signup and view all the answers

What is the role of the thalamus in the thalamocortical loop?

<p>Receiving input from the cortex and projecting back to the cortex (C)</p> Signup and view all the answers

What is the primary function of the midbrain reticular formation?

<p>Controlling wakefulness and arousal (D)</p> Signup and view all the answers

What is the main function of the ventro-lateral preoptic area (VLPO) in the brain?

<p>To promote inhibitory neurotransmitters during sleep (C)</p> Signup and view all the answers

What is the synaptic homeostasis hypothesis?

<p>Synaptic connections are strengthened during wake and downscaled during sleep (B)</p> Signup and view all the answers

Who first described the ascending reticular activating system?

<p>Moruzzi &amp; Magoun (A)</p> Signup and view all the answers

Where do cholinergic neurons originate from in the brain?

<p>The laterodorsal tegmental (LDT) and pedunculopontine nuclei (PPT) (A)</p> Signup and view all the answers

Where do monoaminergic neurons project to in the brain?

<p>The lateral hypothalamus (LH) (D)</p> Signup and view all the answers

Where do monoaminergic neurons come from in the brain?

<p>Norepinephrine - the locus coeruleus (D)</p> Signup and view all the answers

What is the primary role of the median preoptic nucleus (MnPO) in the brain?

<p>To be highest during sleep onset and dissipate across the night (D)</p> Signup and view all the answers

What are the main functions of the parafacial zone (PFZ) in the brain?

<p>To send upward sleep signals via GABA and switch off areas related to alertness (D)</p> Signup and view all the answers

What is the known function of orexin in the brain?

<p>Stimulates wake, feeding, and reward (D)</p> Signup and view all the answers

What is the meaning of Zeitgeber in the context of circadian rhythm?

<p>It represents the 'outer' day, usually referring to the light cycle (A)</p> Signup and view all the answers

What is the difference between phase delay and phase advance in relation to circadian rhythm?

<p>Light pulse at the beginning of night causes phase delay, while closer to morning causes phase advance (A)</p> Signup and view all the answers

What is the significance of Circadian Time (CT) in the context of circadian rhythm?

<p>It refers to the 'inner' day of an organism, usually activity onset (C)</p> Signup and view all the answers

What are some non-photic causes of phase shifting in circadian rhythm?

<p>Running (on a wheel) (C)</p> Signup and view all the answers

Which gender has a longer intrinsic period in relation to circadian rhythm?

<p>Men have a longer intrinsic period than women (D)</p> Signup and view all the answers

What does the term 'phase angle' refer to in the context of circadian rhythm?

<p>It signifies the difference between intrinsic time and external time (C)</p> Signup and view all the answers

What is the effect of being on a light cycle on the internal clock in circadian rhythm?

<p>Being on a light cycle will pull the internal clock towards its time (D)</p> Signup and view all the answers

What is the 'free running' period of the circadian clock?

<p>Slightly different from the external cycle being measured (A)</p> Signup and view all the answers

What does phase shift refer to in the context of circadian rhythms?

<p>A rapid change in an oscillation from one phase to another (A)</p> Signup and view all the answers

What is the role of zeitgebers in regulating circadian rhythms?

<p>They are external cues that entrain the internal clock (C)</p> Signup and view all the answers

What is the significance of phase angle in circadian biology?

<p>It represents the difference in time between reference points on two oscillations (B)</p> Signup and view all the answers

What is the role of tau in the context of circadian rhythms?

<p>It refers to the length of the endogenous rhythm (B)</p> Signup and view all the answers

Where does melanopsin sit in the eye?

<p>Ganglion cell layer (D)</p> Signup and view all the answers

What are eclosion rhythms related to?

<p>Emerging from the larva (in insects) (B)</p> Signup and view all the answers

What is the core clock in mammals?

<p>Suprachiasmatic nucleus (SCN) (C)</p> Signup and view all the answers

How do we know the SCN is the clock in mammals?

<p>Ablation - removing the clock eliminates rhythms (B)</p> Signup and view all the answers

What is the function of melanopsin in the circadian system?

<p>Provides light input information (A)</p> Signup and view all the answers

What happens when a SCN is transplanted into an arrhythmic animal?

<p>Brings back rhythms (C)</p> Signup and view all the answers

At what age do toddlers typically experience a drop in sleep duration compared to infancy?

<p>3 years (D)</p> Signup and view all the answers

What sleep architecture starts to resemble adults at around 4/5 years of age?

<p>Sleep spindles (A)</p> Signup and view all the answers

What is associated with reduced slow wave sleep in older age?

<p>Prefrontal atrophy (C)</p> Signup and view all the answers

At what age does diurnal preference start to develop?

<p>6 years (B)</p> Signup and view all the answers

What characterizes quiet sleep in foetal sleep?

<p>Precursor to NREM sleep (A)</p> Signup and view all the answers

What is the precursor to REM sleep in foetal sleep?

<p>Active sleep (D)</p> Signup and view all the answers

At what age do newborns start to experience day/night entrainment?

<p>16 weeks (C)</p> Signup and view all the answers

At what age do sleep spindles and K-complexes typically develop in newborns?

<p>6 months (B)</p> Signup and view all the answers

What is the expected sleep duration for newborns?

<p>16 hours (B)</p> Signup and view all the answers

At what age do toddlers typically drop their daytime nap?

<p>3 years (A)</p> Signup and view all the answers

What is the primary sleep issue commonly experienced by children between 4-10 years of age?

<p>Difficulty falling asleep (D)</p> Signup and view all the answers

How is delayed phase sleep disorder diagnosed?

<p>By assessing the individual's subjective account (B)</p> Signup and view all the answers

What is non-24 hour sleep wake disorder characterized by?

<p>Peak melatonin falling at random points in the day (C)</p> Signup and view all the answers

What is acrophase in the context of circadian rhythms?

<p>The peak time for melatonin (C)</p> Signup and view all the answers

How is DLMO (Dim light melatonin onset) used?

<p>To measure entrainment to a 24-hour light/dark cycle (B)</p> Signup and view all the answers

What is the primary characteristic of shift work disorder?

<p>Impaired sleep and impaired wake (B)</p> Signup and view all the answers

What is the significance of measuring melatonin?

<p>To determine the suppression of melatonin by light (C)</p> Signup and view all the answers

What is the typical duration of sleep needed by humans?

<p>7-9 hours (D)</p> Signup and view all the answers

What percentage of people in Australia have sleep complaints?

<p>20-30% (B)</p> Signup and view all the answers

What is a protective factor for sleep issues before bed?

<p>Time with family (A)</p> Signup and view all the answers

What results in increases in sleep latency?

<p>Pre-sleep arousal (e.g., social media) (B)</p> Signup and view all the answers

Who is a particularly vulnerable population to sleep disturbances?

<p>Adolescents (C)</p> Signup and view all the answers

What sleep efficiency percentage is considered good?

<p>85% (B)</p> Signup and view all the answers

Which population has highly variable sleep?

<p>Adolescents (B)</p> Signup and view all the answers

How common is insomnia?

<p>1 in 3 people (A)</p> Signup and view all the answers

What are the components considered in CBT-I?

<p>Stimulus control (C)</p> Signup and view all the answers

What is a risk factor for sleep issues before bed?

<p>Playing video games (A)</p> Signup and view all the answers

What is a common protective factor for sleep issues before bed?

<p>Spending time with family (D)</p> Signup and view all the answers

Which factor is associated with an increase in mortality, especially in terms of cardiometabolic activity?

<p>Disrupting clock with light (D)</p> Signup and view all the answers

What hormonal signal is lower when individuals get less sleep, impacting their ability to feel satiated?

<p>Leptin (B)</p> Signup and view all the answers

What is the primary impact of sleep restriction on glucose tolerance?

<p>Impaired ability to clear glucose from the system (B)</p> Signup and view all the answers

What determines an individual's ability to sleep according to circadian time?

<p>Circadian rhythms (A)</p> Signup and view all the answers

What is the primary association between sleep duration and BMI?

<p>Less sleep leads to higher BMI (B)</p> Signup and view all the answers

What is the impact of light at night on glucose tolerance?

<p>Reduces glucose tolerance (C)</p> Signup and view all the answers

What is the primary function of the sleep/wake homeostat?

<p>Building of sleepiness as one stays awake (C)</p> Signup and view all the answers

What happens when an individual goes to bed a few hours earlier or later than their circadian clock dictates?

<p>They experience much more wakefulness during sleep (B)</p> Signup and view all the answers

What is a potential consequence of circadian misalignment?

<p>Increased risk of obesity (A)</p> Signup and view all the answers

What effect does light exposure have on melatonin and cancer risk?

<p>Light decreases melatonin, increasing cancer risk (A)</p> Signup and view all the answers

What is the impact of shift work on cancer risk, according to the text?

<p>Shift work is associated with increased cancer risk (C)</p> Signup and view all the answers

What is the relationship between circadian rhythm disturbance and cardiovascular disease?

<p>Circadian rhythm disturbance is associated with increased cardiovascular disease (D)</p> Signup and view all the answers

How does light sensitivity differ in bipolar disorder and depression?

<p>Light sensitivity is increased in bipolar disorder but decreased in depression (B)</p> Signup and view all the answers

What is the impact of SSRIs on light sensitivity in individuals with depression?

<p>SSRIs increase light sensitivity in individuals with depression (C)</p> Signup and view all the answers

When are heart attacks most common, according to the text?

<p>Most common in the morning (B)</p> Signup and view all the answers

What is the impact of circadian phase on seasonal affective disorder (SAD) severity?

<p>Moving off an ideal circadian phase increases SAD severity (B)</p> Signup and view all the answers

What is the impact of delayed melatonin secretion on Major Depressive Disorder (MDD) symptoms?

<p>Delayed melatonin secretion correlates with increased MDD symptoms (D)</p> Signup and view all the answers

What is the term for the sleep pattern of having one sleep period per day?

<p>Monophasic (B)</p> Signup and view all the answers

What distinguishes human sleep from that of other mammals?

<p>Shorter duration (C)</p> Signup and view all the answers

What is the evolutionary advantage of sentinel behavior?

<p>Protecting the tribe during sleep (D)</p> Signup and view all the answers

What does the evidence against segmented sleep suggest?

<p>Segmented sleep is a modern phenomenon (A)</p> Signup and view all the answers

What is the term for animals that are active primarily during the night?

<p>Nocturnal (D)</p> Signup and view all the answers

What is the term for animals that are active primarily during the day?

<p>Diurnal (C)</p> Signup and view all the answers

What is the term for animals that are active primarily during twilight?

<p>Crepuscular (C)</p> Signup and view all the answers

What type of sleep pattern is not suited to human adults according to the text?

<p>Polyphasic sleep (A)</p> Signup and view all the answers

What type of light exposure has a larger impact on the circadian system according to the text?

<p>White LEDs (B)</p> Signup and view all the answers

What has enabled humans to reshape sleep patterns at will according to the text?

<p>Electricity (B)</p> Signup and view all the answers

What does spending less time outdoors in sunshine and brighter light at night lead to according to the text?

<p>Worse sleep and phase delay (A)</p> Signup and view all the answers

What is the primary impact of white LEDs on the circadian system according to the text?

<p>Larger impact on melanopsin (A)</p> Signup and view all the answers

What was used by prehistoric humans to see at night, which did not disrupt sleep as much according to the text?

<p>Fire (A)</p> Signup and view all the answers

What type of sleep pattern do humans almost always favor in lab settings according to the text?

<p>Monophasic sleep (A)</p> Signup and view all the answers

What is not adapted to the reshaped sleep patterns enabled by electricity according to the text?

<p>Our physiology (B)</p> Signup and view all the answers

What is a characteristic of rapid entry to REM sleep according to the text?

<p>Sign of REM sleep deprivation (A)</p> Signup and view all the answers

What is sleep insufficiency defined as?

<p>When sleep is insufficient to support adequate alertness, performance, and health (A)</p> Signup and view all the answers

What cognitive domains does sleep loss affect?

<p>Attention, Executive function, and Emotional regulation (D)</p> Signup and view all the answers

What is the definition of alertness?

<p>Non-specific brain activation in relation to sleep and wake (A)</p> Signup and view all the answers

What are some determining factors of alertness?

<p>Chronic sleep restriction, Time of day (phase), Sleep inertia, Presence of sleep disorder (B)</p> Signup and view all the answers

What is a common subjective measure of alertness?

<p>Karolinska Sleepiness Scales (B)</p> Signup and view all the answers

What are objective measures of alertness?

<p>Pupil size, EEG, Self-reported questionnaires (A)</p> Signup and view all the answers

What percentage of Australians report suffering from insufficient sleep?

<p>40% (A)</p> Signup and view all the answers

What is the most common subjective measure of alertness?

<p>Karolinska Sleepiness Scales (D)</p> Signup and view all the answers

What is the primary impact of sleep insufficiency?

<p>Decreased productivity (C)</p> Signup and view all the answers

What are potential work-related issues resulting from sleep insufficiency?

<p>Stroke, Workplace injuries, Depression (C)</p> Signup and view all the answers

What is the impact of chronic sleep restriction on alertness?

<p>Alertness degrades cumulatively with each day that sleep is inadequate (A)</p> Signup and view all the answers

What is the impact of time of day on alertness?

<p>Alertness is worse during the night (B)</p> Signup and view all the answers

What is measured in the Multiple Sleep Latency Test (MSLT)?

<p>Time taken to fall asleep during scheduled naps (C)</p> Signup and view all the answers

What is the main outcome measured in Ocular Derived Alertness Outcomes?

<p>Blink rate (D)</p> Signup and view all the answers

What does EEG derived alertness outcomes measure?

<p>Number of microsleeps (B)</p> Signup and view all the answers

What is attention control networks of the brain affected by sleep insufficiency?

<p>Dorsal - fronto-parietal network reduced control (B)</p> Signup and view all the answers

How does sleep deprivation impact planning?

<p>It impairs planning time (A)</p> Signup and view all the answers

What is the impact of sleep deprivation on decision making?

<p>It is compromised (C)</p> Signup and view all the answers

What is the effect of sleep insufficiency on cognitive flexibility?

<p>It is impaired (C)</p> Signup and view all the answers

What is the primary measure in Psychomotor Vigilance Task (PVT)?

<p>Reaction time to visual stimuli (B)</p> Signup and view all the answers

What part of the brain do the executive functions rely on?

<p>Prefrontal cortex (B)</p> Signup and view all the answers

What is the primary outcome of sleep deprived performance?

<p>Unstable performance (A)</p> Signup and view all the answers

What is the impact of sleep deprivation on amygdala activation?

<p>60% increase in activation (B)</p> Signup and view all the answers

What role does age play in vulnerability to sleep loss in the context of driving performance?

<p>Young drivers are more affected (A)</p> Signup and view all the answers

What are the cons of using averages to measure sleep regularity?

<p>They overlook regularity and variability (A)</p> Signup and view all the answers

What are the three traditional measures of sleep regularity?

<p>Standard deviation, social jetlag, and interdaily stability (D)</p> Signup and view all the answers

What are the pros and cons of using standard deviation to measure sleep regularity?

<p>Pro: Measures intraindividual variability; Con: Does not consider the ordering of days (C)</p> Signup and view all the answers

What is the primary disadvantage of using averages to measure sleep regularity?

<p>They do not capture regularity and variability (A)</p> Signup and view all the answers

What is the purpose of using interdaily stability to measure sleep regularity?

<p>To compare the pattern of activity on each day to the average across days (C)</p> Signup and view all the answers

What does social jetlag measure in the context of sleep regularity?

<p>Difference in average midsleep timing between work/school days and days off (A)</p> Signup and view all the answers

What is the drawback of using standard deviation to measure sleep regularity?

<p>It overlooks the ordering of days (D)</p> Signup and view all the answers

What is the limitation of using social jetlag to measure sleep regularity?

<p>It does not account for intraindividual variability (C)</p> Signup and view all the answers

What is the advantage of using interdaily stability to measure sleep regularity?

<p>It compares the pattern of activity on each day to the average across days (D)</p> Signup and view all the answers

What is the primary limitation of using averages to measure sleep regularity?

<p>They overlook regularity and variability (B)</p> Signup and view all the answers

What does interdaily stability score of 1 indicate?

<p>Super regular pattern of activity (A)</p> Signup and view all the answers

What is the main drawback of using social jetlag to measure sleep regularity?

<p>It does not account for intraindividual variability (B)</p> Signup and view all the answers

What is the primary function of melanopsin in the eye?

<p>Regulating circadian rhythm (A)</p> Signup and view all the answers

What is the impact of light exposure on the human habenula?

<p>Inhibition by light leads to increased optimism (C)</p> Signup and view all the answers

What is the relationship between light exposure and amygdala activation?

<p>Light suppresses amygdala activation (D)</p> Signup and view all the answers

What impact does SSRIs (Selective Serotonin Reuptake Inhibitors) have on light sensitivity?

<p>SSRIs greatly increase light sensitivity (A)</p> Signup and view all the answers

What is the recommended approach to enhance the effectiveness of SSRIs?

<p>Combining light therapy with SSRI treatment (B)</p> Signup and view all the answers

What is the impact of evening light exposure on humans?

<p>Humans are 3-4x more sensitive to evening light than previously thought (D)</p> Signup and view all the answers

What is the impact of blue light on slow wave sleep?

<p>Blue light suppresses slow wave sleep in the frontal brain regions (A)</p> Signup and view all the answers

What is the potential impact of healthy light behaviors on socioeconomic status?

<p>Healthy light behaviors may relate to socioeconomic status (D)</p> Signup and view all the answers

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