NREM3d

NREM3d refers to Stage 3 of Non-Rapid Eye Movement (NREM) sleep, also known as slow-wave sleep or deep sleep. This stage is characterized by the presence of slow, high-amplitude delta waves on an electroencephalogram (EEG). NREM3d is considered the most restorative stage of sleep, playing a crucial role in physical recovery, growth, and memory consolidation.

During NREM3d, physiological processes slow down significantly. Heart rate and breathing become slower and more regular, blood pressure drops, and muscle activity is minimal. It is also the stage where the body releases growth hormone, essential for tissue repair and development. Waking someone from NREM3d sleep can result in a period of grogginess and disorientation, known as sleep inertia.

The amount of NREM3d sleep an individual gets changes throughout the lifespan. Infants and young children spend a larger proportion of their sleep time in this deep stage, while older adults typically experience a reduction in NREM3d. Disruptions to NREM3d sleep, whether due to sleep disorders, environmental factors, or lifestyle choices, can have negative consequences on overall health and well-being, potentially impacting cognitive function, mood, and immune system performance.