Sleep Stages and Circadian Rhythms
24 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary characteristic of sleep spindles?

  • They are solely associated with REM sleep
  • They help maintain a tranquil state during sleep (correct)
  • They promote waking from sleep
  • They increase cognitive processes during sleep

N3 sleep is associated with very fast brain waves.

False (B)

What is the purpose of K-complexes during sleep?

To suppress cortical arousal and aid in sleep-based memory consolidation.

During _____ sleep, most dreaming occurs.

<p>REM</p> Signup and view all the answers

Match the following stages of sleep with their characteristics:

<p>N2 = Stage with sleep spindles N3 = Slow-wave sleep with delta waves REM = Stage with rapid eye movement and muscle paralysis Hypnic Jerks = Sudden muscle contractions during falling asleep</p> Signup and view all the answers

What are delta waves primarily associated with?

<p>NREM sleep, specifically N3 (D)</p> Signup and view all the answers

Touching someone lightly during sleep cannot trigger K-complexes.

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

What physiological state occurs during REM sleep?

<p>Muscle paralysis.</p> Signup and view all the answers

What is the first stage of sleep, characterized by the transition between sleep and wakefulness?

<p>N1 (B)</p> Signup and view all the answers

What is REM sleep often referred to as, and why?

<p>Paradoxical sleep due to the brain's high activity while the body is inactive. (C)</p> Signup and view all the answers

Sleep spindles are associated with the N1 stage of sleep.

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

What phenomenon might a person experience during N1 stage due to repetitive activities?

<p>hypnagogic hallucinations</p> Signup and view all the answers

Circadian rhythms only affect sleep, not wakefulness.

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

The sudden muscle twitches that can occur as a person falls asleep are known as __________.

<p>hypnic jerks</p> Signup and view all the answers

What are the stages of non-REM (NREM) sleep in order?

<p>N1, N2, N3</p> Signup and view all the answers

Match the stages of sleep with their key characteristics:

<p>N1 = Lightest stage of sleep where hypnic jerks may occur N2 = Deeper sleep with sleep spindles and K-complexes N3 = Deep sleep with the lowest brain activity REM = Stage associated with vivid dreaming</p> Signup and view all the answers

If you want to remember your dreams, you can set your alarm to go off a little earlier than usual, like ______ minutes.

<p>15</p> Signup and view all the answers

Match the sleep stage with its characteristic:

<p>N1 = Light sleep where you can be easily awakened N2 = Sleep where eye movement stops and heart rate slows N3 = Deep sleep known for slow-wave activity REM = Dreaming occurs and the brain appears very active</p> Signup and view all the answers

What brain activity is primarily observed in the N2 stage of sleep?

<p>Theta waves, sleep spindles (C)</p> Signup and view all the answers

Circadian rhythms have no impact on sleep patterns.

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

How many times does a normal sleeper cycle through the stages of sleep in a night?

<p>About four to five times (D)</p> Signup and view all the answers

Hypnic jerks occur during the waking stages of sleep.

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

What are two common sensations experienced during the N1 stage of sleep?

<p>hypnagogic hallucinations and a feeling of falling</p> Signup and view all the answers

What determines how long each sleep stage lasts?

<p>Age and duration of sleep</p> Signup and view all the answers

Flashcards

Sleep Spindles

Brain waves that help inhibit certain cognitive processes and perceptions, promoting sleep.

K-Complexes

A type of brainwave thought to suppress cortical arousal, helping you stay asleep.

N3 Sleep

The third stage of non-REM sleep, also known as slow-wave sleep, characterized by slow delta waves.

Delta Waves

The slow brain waves that occur in N3 sleep, ranging from 0.5 to 2 hertz.

Signup and view all the flashcards

REM Sleep

A sleep stage characterized by rapid eye movement (REM) and muscle paralysis.

Signup and view all the flashcards

Sleep Paralysis

A state where muscles are paralyzed during REM sleep.

Signup and view all the flashcards

Memory Consolidation

The theory that memories are transferred into long-term memory during sleep.

Signup and view all the flashcards

N2 Sleep

A stage of non-REM sleep, preceding N3 sleep.

Signup and view all the flashcards

Hypnagogic Hallucinations

Strange sensations experienced during the transition from wakefulness to sleep, such as hearing or seeing things that aren't there.

Signup and view all the flashcards

Hypnic Jerk

A sudden muscle twitch or spasm that occurs as you fall asleep.

Signup and view all the flashcards

Tetris Effect

A type of hypnagogic hallucination where you see visual images related to something you did right before bed.

Signup and view all the flashcards

What are the four main stages of sleep?

The four main stages of sleep are N1, N2, N3, and REM.

Signup and view all the flashcards

Paradoxical Sleep

REM sleep is called paradoxical because your brain is active like when you're awake, but your body is paralyzed.

Signup and view all the flashcards

Sleep Cycle

The series of stages your body goes through during a night's sleep. A complete cycle includes stages N1, N2, N3, and REM, taking about 90 minutes.

Signup and view all the flashcards

What happens to sleep stages as the night progresses?

As the night goes on, you spend less time in deep sleep (N3) and more time in REM sleep, which is why you're more likely to dream right before waking up.

Signup and view all the flashcards

How to improve dream recall

To remember your dreams, you can set your alarm to wake you up 15 minutes earlier than usual, because you're most likely dreaming in REM sleep just before waking.

Signup and view all the flashcards

Circadian Rhythms

The natural, 24-hour cycle of your body that regulates your sleep-wake cycle and other bodily functions.

Signup and view all the flashcards

Why do you feel tired at the same time every day?

Your circadian rhythms influence when you feel tired and sleepy, making you naturally feel tired at a similar time each day.

Signup and view all the flashcards

Study Notes

Sleep Stages

  • Sleep occurs in ~90-minute cycles
  • Four main stages:
    • N1 (Non-REM): Transition between wakefulness and sleep; theta waves; hypnagogic hallucinations (e.g., seeing/hearing things that aren't there, feeling like you're falling).
    • N2 (Non-REM): Slightly deeper sleep; harder to wake up; theta waves, sleep spindles, and K-complexes. Sleep spindles may inhibit cognitive processing. K-complexes are different brain activity that may suppress stimuli.
    • N3 (Non-REM): Slow-wave sleep; delta waves (0.5-2 Hz); difficult to wake up; sleepwalking and talking occur in this stage.
    • REM (Rapid Eye Movement): Eyes move rapidly beneath lids; paralysis of most muscles; dreaming commonly occurs; called paradoxical sleep because the brain is active but the body is inactive.

Circadian Rhythms

  • Circadian rhythms are 24-hour bodily rhythms.
  • Body temperature rises during the day, dips in the afternoon, rises again in the evening, and falls at night.
  • Affect sleep and wake cycles .
  • Daylight is a primary cue for circadian rhythms.
  • Artificial light can impact circadian clocks (jet lag).
  • Biological clocks adapt to different time zones (e.g., adjusting to daylight savings).
  • Circadian rhythms change with age. Young adults often stay up later, older people typically go to bed and wake up earlier.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

Sleep Stages and Circadian Rhythms Transcript PDF

Description

Explore the intricate world of sleep with this quiz on sleep stages and circadian rhythms. Understand the various phases of sleep, from non-REM to REM, and learn how circadian rhythms influence bodily functions throughout the day. Perfect for students and anyone curious about sleep physiology.

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser