Navigation Links
Stress-related disorders affect brain’s processing of memory
Date:12/2/2008

CHICAGO Researchers using functional MRI (fMRI) have determined that the circuitry in the area of the brain responsible for suppressing memory is dysfunctional in patients suffering from stress-related psychiatric disorders. Results of the study will be presented today at the annual meeting of the Radiological Society of North America (RSNA).

"For patients with major depression and other stress-related disorders, traumatic memories are a source of anxiety," said Nivedita Agarwal, M.D., radiology resident at the University of Udine in Italy, where the study is being conducted, and research fellow at the Brain Imaging Center of McLean Hospital, Department of Psychiatry at Harvard Medical School in Boston. "Because traumatic memories are not adequately suppressed by the brain, they continue to interfere with the patient's life."

Dr. Agarwal and colleagues used brain fMRI to explore alterations in the neural circuitry that links the prefrontal cortex to the hippocampus, while study participants performed a memory task. Participants included 11 patients with major depression, 13 with generalized anxiety disorder, nine with panic attack disorders, five with borderline personality disorder and 21 healthy individuals. All patients reported suffering varying degrees of stressful traumatic events, such as sexual or physical abuse, difficult relationships or "mobbing" a type of bullying or harassment at some point in their lives.

After reviewing a list of neutral word pairs, each participant underwent fMRI. During imaging, they were presented with one of the words and asked to either recall or to suppress the memory of its associated word.

The fMRI images revealed that the prefrontal cortex, which controls the suppression and retrieval of memories processed by the hippocampus, showed abnormal activation in the patients with stress-related disorders compared to the healthy controls. During the memory suppression phase of the test, patients with stress-related disorders showed greater activation in the hippocampus, suggesting that insufficient activation of the prefrontal cortex could be the basis for inadequate suppression of unwanted traumatic memories stored in the hippocampus.

"These data suggest that the mechanism for memory suppression is dysfunctional in patients with stress-related disorders primarily because of an alteration of the prefrontal cortex," Dr. Agarwal said. "These patients often complain of poor memory, which might in part be attributed to this altered circuitry," she added.

According to Dr. Agarwal, fMRI is an important tool in understanding the neurobiological basis of psychiatric disorders and in identifying imaging markers to psychiatric disease, helping clinicians target specific parts of the brain for treatment.


'/>"/>

Contact: Linda Brooks
lbrooks@rsna.org
630-590-7762
Radiological Society of North America
Source:Eurekalert

Related medicine news :

1. Stress-Related and Emotional Eating Can Be Curbed With the Vitamin Code(TM) Perfect Weight Formula
2. Chiropractic Can Offer Relief from Stress-Related Pain, Health Problems
3. Gene Variant Boosts Risk for Stress-Related Ischemia
4. Few Young Adults Seek Treatment for Psych Disorders
5. Low Childhood IQ Tied to Risk of Later Mental Disorders
6. Documentary Examining Deadly Blood Disorders and Lifesaving Research to Premiere on Discovery Health
7. Hyperion Therapeutics Completes Phase 2 Data Analysis and Schedules End of Phase 2 Meeting With FDA for HPN-100 in the Chronic Treatment of Urea Cycle Disorders
8. Documentary Examining Deadly Blood Disorders and Lifesaving Research to Premiere on Discovery Health
9. Rural women are at higher risk of blood pressure disorders during pregnancy
10. First Study of War-Related Mental Disorders Among Iraqis 10 Years Post-Gulf War Published by Researchers at Wayne State University and Basrah University, Iraq
11. Psychiatric Congress Focus on Depressive Disorders Continues Through the Weekend
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/26/2016)... Knoxville, TN (PRWEB) , ... May 26, 2016 ... ... professional fitness education and products recently hosted the first PowerWave Instructor Certification Course ... Fouts, who lead a group of fitness professional through the 8 hour interactive ...
(Date:5/26/2016)... ... May 26, 2016 , ... OncLive® , a ... Cancer Institute-designated University of Virginia (UVA) Cancer Center to its quickly ... and marketing teams will publicize and promote public awareness of UVA Cancer Center’s ...
(Date:5/26/2016)... Redwood City, CA (PRWEB) , ... May 26, 2016 , ... ... time, Silicon Valley-based startup, The Dough Bar, has ignited an undeniable buzz ... shake -- a doughnut. But not just any doughnut.  These doughnuts are packed with ...
(Date:5/26/2016)... ... May 26, 2016 , ... Workrite ... sales leadership and to further develop their rapidly expanding portfolio of customer and ... with a concentration in Marketing and an M.B.A. with concentration in management from ...
(Date:5/26/2016)... ... May 26, 2016 , ... Saint Francis ... several years, and the efforts have paid off. Since implementation of these ... of care to enhance perioperative patient experiences and reduce costly complications. Since implementation ...
Breaking Medicine News(10 mins):
(Date:5/24/2016)... 24, 2016 Open Access Journal ... Neurophysiology  Elsevier , a world-leading provider ... today announced the launch of Clinical Neurophysiology ... that focuses on clinical practice issues in clinical neurophysiology. ... series, normal values and didactic reviews. It is an ...
(Date:5/24/2016)... 2016 Een app die artsen ... collectief patiënten kunnen behandelen, hun kennis kunnen delen en ... de nieuwe en revolutionaire MDLinking App, ontwikkeld door een ... dr. Hans Flu en oncologisch chirurg dr. Gijs ... is, wordt op dinsdag 24 mei officieel gepresenteerd op ...
(Date:5/23/2016)... , May 23, 2016 Global ... 163 pages, profiles 12 companies and the Paclitaxel analysis ... figures on the industry and its players. ... comprehensive in nature, details the current state of the ... including definitions, classifications, applications and industry chain structure. The ...
Breaking Medicine Technology: