1 / 17

Consciousness & Sleep

This exploration covers the fundamental concepts of consciousness and sleep. Consciousness encompasses various levels, including awareness, preconscious, nonconscious, and unconscious states. We also delve into the circadian rhythm, regulated by the suprachiasmatic nucleus, which governs our biological clock. The sleep cycle features distinct stages, primarily NREM (75% of sleep) and REM (25% of sleep), each crucial for bodily restoration and brain activity. Understanding EEG patterns, brain waves, and their correlation with different sleep stages aids in grasping the complexities of consciousness and sleep.

zohar
Télécharger la présentation

Consciousness & Sleep

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Consciousness & Sleep Today’s Goal: Define the levels of consciousness and the stages of the sleep cycle.

  2. Consciousness • Awareness of ourselves & environment • Preconscious • Nonconscious • Unconscious • Dual processing

  3. Circadian Rhythm • Biological clock – regular bodily rhythms of 24-hour cycle • Suprachiasmatic nucleus (SCN) – regulates gland production of melatonin

  4. Sleep Cycle/Stages • EEG – brain wave activity • Stages 1-4 = NREM sleep • REM sleep

  5. Electrooculograms – eye movement • Electromyograms – muscle tension

  6. Today’s Goal: Define the levels of consciousness and the stages of the sleep cycle.

  7. NREM/REM Sleep • NREM (non-rapid-eye-movement) • 75% of sleep • Restores the body • REM (rapid-eye-movement • 25% of sleep • Restores brain • Vivid dreams • Body immobile

  8. Awake & alert – Beta waves • Faster, irregular waves • 15-45 peaks per second • Awake but relaxed – Alpha waves • Smooth, regular waves • 10 peaks per sec.

  9. NREM Stage 1 • Theta waves • ~10 min. • Transition from wakefulness to sleep • Hypnagogic state – brief dreamlike experience • Hypnic jerks (body shutting down)

  10. NREM Stage 2 • Theta waves • Sleep spindles – brief bursts in wave frequency • K Complexes – brief bursts in wave amplitude

  11. Stages 3 & 4 • Delta waves ~30-40 min. of cycle • Blood pressure drops • Slowed breathing • Tissue growth, repairs • Growth hormone

  12. REM Sleep • Paradoxical sleep • Brain is active but body is immobile • Vivid dreams • Cortisol drops • Helps immune system

  13. Sleep Cycle

  14. Sleep Cycle

More Related