REM Sleep, Stress Hormones, and the Overactive Amygdala: How Stress Disrupts Sleep
Sleep is essential for overall health, but stress can significantly impact its quality—especially REM sleep , the stage associated with vivid dreams, memory consolidation, and emotional processing. When stress hormones like adrenaline, cortisol, and ACTH are elevated, they can disrupt REM sleep and overactivate the amygdala , the brain’s emotional center. This imbalance may lead to restless nights, frequent awakenings, and even nightmares. Understanding REM Sleep and Its Role in Brain Function REM ( Rapid Eye Movement ) sleep is one of the most important sleep stages, characterized by: Increased brain activity (similar to wakefulness) Vivid dreaming Muscle paralysis (atonia) to prevent acting out dreams Memory processing and emotional regulation REM sleep plays a crucial role in emotional well-being, but it is also highly sensitive to stress-related hormones. How High Cortisol, ACTH, and Adrenaline Disrupt REM Sleep 1. Cortisol: The Stress Hormone That Disrupts Sleep Cycles Cortisol...