Effects of Fragmented REM Sleep on Emotional Consolidation in Individuals with Nightmare Disorder

Frequent nightmares disrupt the brain's consolidation of emotional memories during REM sleep. REM sleep normally provides a neurobiological environment for integrating emotionally charged experiences, but nightmares fragment or shorten this stage, impairing emotional regulation and memory clarity. This literature review synthesizes findings from neuroscience, sleep medicine, and psychology, showing that recurrent nightmares can reinforce threat-related associations and hinder adaptive emotional processing. These insights highlight the potential of targeted interventions, such as imagery rehearsal therapy and memory reactivation, to restore healthy REM function and improve emotional resilience.

Study at a glance

Abstract

Nightmares, especially when frequent, can significantly disrupt the brain’s process of consolidating emotional memories during rapid eye movement (REM) sleep. REM provides a unique neurobiological environment for integrating emotionally charged experiences, but nightmares fragment or shorten this stage, impairing emotional regulation and memory clarity. This literature review synthesizes findings from neuroscience, sleep medicine, and psychology, showing that recurrent nightmares can reinforce threat-related associations and hinder adaptive emotional processing. These insights highlight the potential of targeted interventions, such as imagery rehearsal therapy and memory reactivation, to restore healthy REM function and improve emotional resilience.