Which Sleep Stage Lasts About 20 Minutes and Includes Periodic

question 507

Multiple Choice

Which sleep stage lasts about 20 minutes and includes periodic sleep spindles?

• A) NREM-1 (N1)
• B) NREM-2 (N2)
• C) NREM-3 (N3)
• D) REM (R)

---

Definitions:

Social Unrest

A condition of discontent, disagreement, or disorder among a group of people, often leading to protests or conflicts.

Fraternalistic Deprivation

The feeling of injustice that arises when people perceive that members of their own group are disadvantaged compared to another group.

Egoistic Deprivation

A feeling of lacking or being deprived of something essential to one's self-image or well-being, often driven by personal interest.

Intergroup Relations

The interactions and relationships that occur between groups of people, which can include aspects of conflict, cooperation, and competition.