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Sleep Deprivation May Help Prevent PTSD

a person with disturbed sleepWe commonly think of sleep as a healing process that melts away the stresses of the day and prepares us to deal with new challenges. Research has also shown that sleep plays a crucial role in the development of memories. Now researchers believe that sleep deprivation may help prevent maladaptive memory formation after experiencing a disturbing event, and noted that these findings have obvious implications for the treatment of posttraumatic stress disorder (PTSD).

An important component of anxiety disorders, including PTSD, is the formulation of memories associated with fear. Therefore, researchers hypothesized that sleep deprivation after exposure to an aversive event might eliminate the associated fear, due to the lack of memory consolidation that would typically occur during sleep.

Researchers evaluated healthy volunteers who were shown video clips of both safe driving and unexpected motor vehicle accidents. Half of the volunteers were then deprived of sleep while the other half received a normal night’s sleep.

Later testing sessions revealed that sleep deprivation eliminated the fear-associated memories through both fear recognition and physiological fear reactions, suggesting a possible therapy for individuals with PTSD or other anxiety disorders.

Dr. Kenichi Kuriyama, corresponding author, explained: “Sleep deprivation after exposure to a traumatic event, whether intentional or not, may help prevent PTSD. Our findings may help to clarify the functional role of acute insomnia and to develop a prophylactic strategy of sleep restriction for prevention of PTSD.”

“It would be nice if the benefits of sleep deprivation upon fear learning could be produced more easily for survivors of extreme stress,” noted John Krystal, M.D., Editor of Biological Psychiatry and Professor and Chair of Psychiatry at Yale University. “New insights into the neurobiology of sleep dependent learning may make it possible for these people to take a medication that disrupts this process while leaving restorative elements of sleep intact.”

Further research is necessary, but these findings indicate that sleep deprivation is a promising avenue for the possible treatment and prevention of PTSD.

Material adapted from Elsevier.

Reference
The article is “Sleep Deprivation Facilitates Extinction of Implicit Fear Generalization and Physiological Response to Fear” by Kenichi Kuriyama, Takahiro Soshi, and Yoshiharu Kim. The authors are affiliated with the Department of Adult Mental Health, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan. The article appears in Biological Psychiatry, Volume 68, Number 11 (December 1, 2010), published by Elsevier.

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