Can EMDR Improve Sleep?

Poor sleep and psychological distress are closely bound together. Among people with PTSD, difficulty falling and staying asleep is close to universal, with estimates suggesting around nine in ten are affected. Even where nightmares are absent, sleep problems are the complaint people raise most often. Sleep disturbance is not simply a side effect either; it appears to play a part in keeping psychiatric difficulties going.This raises a practical question. If EMDR successfully processes the trauma driving the distress, does sleep improve as well?A study published in *Scientific Reports* (2021) examined this in soldiers with PTSD, measuring sleep in a laboratory before and after EMDR treatment rather than relying on self-report alone. After symptoms went into remission, several sleep measures improved. The researchers also found that the increase in rapid eye movement density after remission was linked to greater symptom reduction, and that the number of EMDR sessions needed to reach remission was related to how disrupted a person's sleep had been beforehand, hinting at a possible way of predicting treatment length.There is a neat theoretical connection here. REM sleep is when the brain naturally processes emotional memories, and some researchers have suggested that EMDR may emulate or compensate for REM-sleep mechanisms that are not working properly in PTSD, which would help explain why nightmares are so common in the condition.Two honest limits are worth stating. First, this study looked at what happened after symptoms remitted, and the authors are explicit that further work is needed to establish whether the sleep effect is specific to EMDR rather than a general consequence of recovery. Second, for chronic nightmares specifically, professional sleep guidance points to imagery rehearsal therapy as the first-line treatment, with EMDR better regarded as an alternative or complement when nightmares are clearly tied to unresolved traumatic memories.The realistic summary, then, is this. EMDR is not a treatment for insomnia in general. But where sleep is being disrupted by unprocessed trauma, treating the trauma appears to help the sleep too, and there is objective evidence rather than only patient report behind that.*Source: Marchand, W. R., et al. Sleep parameters improvement in PTSD soldiers after symptoms remission. (2021). Scientific Reports, 11, 8600.*