Delta waves are primarily associated with which stage of sleep?

Delta waves are primarily associated with NREM Stage 3 sleep, which is often referred to as slow-wave sleep or deep sleep. During this stage, the brain exhibits high-amplitude, low-frequency delta waves, which are crucial for restorative processes in the body. This stage of sleep is characterized by minimal brain activity, making it difficult to awaken someone who is sleeping deeply.

In NREM Stage 3, the body is engaged in repair and growth functions, including tissue repair, muscle growth, and immune system strengthening. The predominance of delta waves indicates a state of deep relaxation and contributes significantly to overall health and well-being. The presence of these slow waves distinguishes this stage from other stages of sleep, where higher frequency brain waves are observed.