EEG Activity During Sleep Stages Quiz for AP Psychology

🧠 Topic Summary

Electroencephalography (EEG) is a neuroimaging technique that measures brain activity using electrodes placed on the scalp. During sleep, EEG patterns change predictably, reflecting different stages of sleep. These stages include NREM-1 (light sleep), NREM-2 (deeper sleep with sleep spindles and K-complexes), NREM-3 (deepest sleep with slow-wave activity), and REM sleep (brain activity similar to wakefulness, associated with dreaming). Understanding these patterns is crucial for diagnosing sleep disorders and understanding the neurobiology of sleep.

The different brain wave patterns associated with each sleep stage include alpha, beta, theta, and delta waves. Alpha waves are present during relaxed wakefulness, beta waves during alert wakefulness, theta waves during NREM-1 and NREM-2, and delta waves during NREM-3. REM sleep is characterized by a mix of brainwave patterns, including beta waves, similar to wakefulness.

🔬 Part A: Vocabulary

Match the terms with their definitions:

1. Terms:
• 1. Sleep Spindles
• 2. K-Complex
• 3. Delta Waves
• 4. REM Sleep
• 5. Theta Waves
2. Definitions:
• A. Large, slow brain waves associated with deep sleep (NREM-3).
• B. A burst of rapid, rhythmic brainwave activity during NREM-2 sleep.
• C. A single, large-amplitude negative wave followed by a slower positive wave, occurring during NREM-2 sleep.
• D. A stage of sleep characterized by rapid eye movements, dreaming, and brain activity similar to wakefulness.
• E. Brain waves associated with the early stages of sleep (NREM-1 and NREM-2).

Answer Key: 1-B, 2-C, 3-A, 4-D, 5-E

✍️ Part B: Fill in the Blanks

Complete the following paragraph with the correct terms:

During ________ sleep, brain activity resembles wakefulness, and most dreaming occurs. ________ are characteristic of NREM-2 sleep and are thought to play a role in memory consolidation. The deepest stage of sleep, ________, is dominated by ________ waves.

Answer Key: REM, Sleep Spindles, NREM-3, Delta

🤔 Part C: Critical Thinking

How might understanding EEG activity during sleep stages be beneficial in diagnosing and treating sleep disorders?