9.1.1 Stages of Sleep

• What is the definition of sleep as described in the study material?

  Reduced consciousness and rest
• Sleep involves four stages of NREM sleep and one stage of REM sleep.EEG
• Match the stage of sleep with its corresponding brain wave pattern:

  NREM Stage 1 ↔️ Theta waves

  NREM Stage 2 ↔️ Theta waves with sleep spindles

  NREM Stage 3 ↔️ Delta waves

  REM ↔️ Beta waves
• Beta waves are associated with dreaming during REM sleep.
• Order the stages of sleep from lightest to deepest based on EEG wave patterns:

  1️⃣ NREM Stage 1: Theta waves

  2️⃣ NREM Stage 2: Theta waves with sleep spindles

  3️⃣ NREM Stage 3: Delta waves

  4️⃣ NREM Stage 4: Delta waves
• What type of brain waves are dominant during deep sleep in NREM Stage 3?

  Delta waves
• Sleep stages are characterized by unique brain wave patterns measured by an EEG
• REM sleep is characterized by beta waves and dreaming.
• Match the sleep stage with its key feature:

  NREM Stage 1 ↔️ Transition to sleep

  NREM Stage 2 ↔️ Light sleep

  NREM Stage 3 ↔️ Deep sleep

  NREM Stage 4 ↔️ Deepest sleep

  REM ↔️ Dreaming
• Which sleep stage is associated with the transition to sleep and theta waves?

  NREM Stage 1
• NREM Stage 2 is characterized by theta waves and sleep spindles
• What is the deepest stage of NREM sleep characterized by delta waves?

  NREM Stage 4
• REM sleep involves beta waves and dreaming.
• Order the stages of sleep in terms of depth, starting from lightest to deepest:

  1️⃣ NREM Stage 1

  2️⃣ NREM Stage 2

  3️⃣ NREM Stage 3

  4️⃣ NREM Stage 4
• What are the five stages of sleep as described in the study material?

  Four NREM, one REM
• Match the stage of sleep with its key EEG wave pattern:

  NREM Stage 1 ↔️ Theta waves

  NREM Stage 2 ↔️ Theta waves with sleep spindles

  NREM Stage 3 ↔️ Delta waves

  REM ↔️ Beta waves
• What type of brain waves characterize NREM Stage 1 sleep?

  Theta waves
• NREM Stage 2 is characterized by theta waves with sleep spindles.
• NREM Stage3 is associated with delta waves and deep sleep.
• Which stage of sleep is referred to as the deepest sleep?

  NREM Stage 4
• Dreaming primarily occurs during REM sleep, characterized by beta waves.
• The stages of sleep show a progression from light to deep sleep and back to a dreaming stage.
• What is the key function of NREM Stage 3 sleep?

  Deep physical recovery
• REM sleep is essential for cognitive processing, particularly memory consolidation and emotional regulation.
• Sleep enhances cognitive functions such as memory consolidation and decision-making.
• What is the physiological measure used to characterize sleep stages?

  EEG
• Match the stage of sleep with its muscle tone:

  NREM 1 ↔️ Relaxed

  NREM 3 ↔️ Very relaxed

  REM ↔️ Atonia
• What are the two main types of sleep stages?

  NREM and REM
• Sleep is characterized by unique brain wave patterns measured by an EEG
• Sleep involves four stages of NREM sleep and one stage of REM sleep.
• What type of EEG waves are present in NREM Stage 1 sleep?

  Theta waves
• What is a key feature of NREM Stage 2 sleep?

  Light sleep
• Delta waves are characteristic of NREM Stage 3
• Arrange the sleep stages in the order they typically occur.

  1️⃣ NREM Stage 1

  2️⃣ NREM Stage 2

  3️⃣ NREM Stage 3

  4️⃣ NREM Stage 4

  5️⃣ REM
• Match each sleep stage with its corresponding key feature:

  NREM Stage 1 ↔️ Transition to sleep

  NREM Stage 2 ↔️ Light sleep

  NREM Stage 3 ↔️ Deep sleep

  NREM Stage 4 ↔️ Deepest sleep

  REM ↔️ Dreaming
• What EEG wave patterns are present during NREM Stage 1 sleep?

  Theta waves
• What is a key feature of NREM Stage 3 sleep?

  Deep sleep
• Which sleep stage is characterized by beta waves and dreaming?

  REM
• The four stages of NREM sleep are followed by one stage of REM
• What physiological change occurs during NREM Stage 1 sleep?

  Transition to sleep