Sleep Stages

Question 1

Stage 1 of sleep.

Answer 1

This stage occurs As soon as you doze off.

Features:

• Theta waves
• irregular waveforms with slower frequencies and higher voltages

Question 2

Stage 2 of sleep.

Answer 2

This stage occurs as you fall more deeply asleep.

Features:

• Theta waves
• Sleep spindles (small oscillating waves)
• K complex (big N waves)

Question 3

Stages 3 and 4 of sleep.

Answer 3

This stage occurs when your in an even deeper sleep.

Features:

• Delta waves
• Where most sleep disorders occur
• Non rapid eye movement
• cognitive recovery
• Memory consolidation
• Increased growth hormone release

Question 4

Rapid Eye Movement R.E.M. (Paradoxical) stage of sleep.

Answer 4

This stage occurs when individual is sound asleep.

Features:

• Rapid eye movement
• Body Paralysis
• Consolidating Procedural memories