During which sleep stage are body and brain functions generally characterized by low amplitude brain waves?

The correct stage characterized by low amplitude brain waves is Stage 2 sleep. During this phase, which occurs after the initial transition into sleep, brain activity becomes slower with occasional bursts of rapid waves known as sleep spindles. These low amplitude brain waves indicate a deeper stage of sleep than Stage 1, where the brain is barely awake and can be easily disrupted.

In Stage 2 sleep, the body continues to relax further, and it is more challenging to awaken someone. This stage is crucial for memory consolidation and overall sleep quality, serving as a bridge to deeper sleep stages. Understanding these characteristics helps clarify the importance of various sleep stages in regulating our overall health and cognitive functions.