advertisement
Home » News » Effects of Childhood Trauma May Persist in Brain Connectivity of Depressed Patients
Effects of Childhood Trauma May Persist in Brain Connectivity of Depressed Patients

Effects of Childhood Trauma May Persist in Brain Connectivity of Depressed Patients

A study lead by Penn Medicine researchers found that childhood trauma is linked to abnormal connectivity in the brain in adults with major depressive disorder (MDD). The study is the first to show that childhood trauma is linked to symptom-specific, system-level changes in brain network connectivity in MDD.

“With estimates of approximately 10 percent of all children in the United States having been subjected to child abuse, the significance of child maltreatment on brain development and function is an important consideration,” said Yvette I. Sheline, M.D., Perelman School of Medicine at the University of Pennsylvania. The study appears in Proceedings of the National Academy of Sciences (PNAS).

“This study not only confirms the important relationship between childhood trauma and major depression, but also links patients’ experiences of childhood trauma with specific functional brain network abnormalities. This suggests a possible environmental contributor to neurobiological symptoms.”

MDD is a common mental disorder characterized by symptoms including persistently depressed mood, loss of interest, low energy, insomnia or hypersomnia, and more. These symptoms impair daily life and increase the risk of suicide. In addition, experiences of childhood trauma, including physical, sexual, or emotional abuse, as well as physical or emotional neglect, have been associated with the emergence and persistence of depressive and anxiety disorders.

Nevertheless, the neurobiological mechanisms underlying MDD are still largely unknown. To address this challenge, a team led by Sheline utilized functional magnetic resonance imaging (fMRI) to investigate the brain networks and patterns that underlie the disorder.

Researchers compared brain activity in 189 participants with MDD to activity of 39 healthy controls. First author Dr. Meichen Yu, a postdoctoral fellow, conducted statistical analyses to determine the associations between temporal correlations in connectivity within and between 10 well-established, large-scale resting state networks (RSNs) and clinical measures. This included a review of past history of trauma and current clinical symptoms, such as depression, anxiety, and suicidality — symptoms detected and measured by a 213 item-level survey questions.

The authors found that in patients with MDD, while the strongest correlations were with childhood trauma, abnormal network connectivity was also associated with current symptoms of depression. Even though participants in this study were not selected as participants based on a history of trauma, and the brain imaging took place decades after trauma occurred, prior trauma was evident in abnormal functional connectivity.

“These results suggest that resting-state network connectivity may point to some of the brain mechanisms underlying the symptoms of major depressive disorder,” Sheline explains.

“It may have the potential to serve as an effective biomarker, aiding in the development of depression biotypes and opening up the possibility of targeted diagnosis.”

Source: University of Pennsylvania School of Medicine

Effects of Childhood Trauma May Persist in Brain Connectivity of Depressed Patients

Rick Nauert PhD

Rick Nauert, PhDDr. Rick Nauert has over 25 years experience in clinical, administrative and academic healthcare. He is currently an associate professor for Rocky Mountain University of Health Professionals doctoral program in health promotion and wellness. Dr. Nauert began his career as a clinical physical therapist and served as a regional manager for a publicly traded multidisciplinary rehabilitation agency for 12 years. He has masters degrees in health-fitness management and healthcare administration and a doctoral degree from The University of Texas at Austin focused on health care informatics, health administration, health education and health policy. His research efforts included the area of telehealth with a specialty in disease management.

APA Reference
Nauert PhD, R. (2019). Effects of Childhood Trauma May Persist in Brain Connectivity of Depressed Patients. Psych Central. Retrieved on April 26, 2019, from https://psychcentral.com/news/2019/04/09/effects-of-childhood-trauma-may-persist-in-brain-connectivity-of-depressed-patients/144448.html
Scientifically Reviewed
Last updated: 9 Apr 2019
Last reviewed: By a member of our scientific advisory board on 9 Apr 2019
Published on Psych Central.com. All rights reserved.