Functional connectivity reveals inefficient working memory systems in post-traumatic stress disorder

2009 ◽  
Vol 172 (3) ◽  
pp. 235-241 ◽  
Author(s):  
Marnie E. Shaw ◽  
Kathryn A. Moores ◽  
Richard C. Clark ◽  
Alexander C. McFarlane ◽  
Stephen C. Strother ◽  
...  
Keyword(s):  
Working Memory ◽  
Functional Connectivity ◽  
Post Traumatic Stress Disorder ◽  
Traumatic Stress ◽  
Stress Disorder ◽  
Memory Systems ◽  
Post Traumatic Stress ◽  
Post Traumatic

scholarly journals Altered resting-state dorsal anterior cingulate cortex functional connectivity in patients with post-traumatic stress disorder

2018 ◽  
Vol 53 (1) ◽  
pp. 68-79 ◽  
Author(s):  
Hui Juan Chen ◽  
Li Zhang ◽  
Jun Ke ◽  
Rongfeng Qi ◽  
Qiang Xu ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Anterior Cingulate Cortex ◽  
Post Traumatic Stress Disorder ◽  
Traumatic Stress ◽  
Stress Disorder ◽  
Cingulate Cortex ◽  
Anterior Cingulate ◽  
Post Traumatic Stress ◽  
Dorsal Anterior Cingulate Cortex ◽  
Post Traumatic

Objective: The brain functional alterations at regional and network levels in post-traumatic stress disorder patients are still unclear. This study explored brain functional alterations at regional and network levels in post-traumatic stress disorder patients with resting-state functional magnetic resonance imaging and evaluated the relationship between brain function and clinical indices in post-traumatic stress disorder. Methods: Amplitude of low-frequency fluctuation and seed-based functional connectivity analyses were conducted among typhoon survivors with ( n = 27) and without post-traumatic stress disorder ( n = 33) and healthy controls ( n = 30) to assess the spontaneous brain activity and network-level brain function. Pearson correlation analyses were performed to examine the association of brain function with clinical symptom and social support. Results: Both the post-traumatic stress disorder group and the trauma-exposed control group showed decreased amplitude of low-frequency fluctuation in the dorsal anterior cingulate cortex relative to the healthy control group. The post-traumatic stress disorder group showed increased dorsal anterior cingulate cortex functional connectivity with the right paracentral lobule and bilateral precentral gyrus/postcentral gyrus relative to both control groups. Both traumatized groups exhibited decreased dorsal anterior cingulate cortex functional connectivity with the right hippocampus and left cerebellum relative to the healthy control group. More decreased dorsal anterior cingulate cortex functional connectivity with the right hippocampus was found in the post-traumatic stress disorder group. The Checklist-Civilian Version score positively correlated with functional connectivity between the dorsal anterior cingulate cortex and the right paracentral lobule as well as between the dorsal anterior cingulate cortex and the right precentral gyrus/postcentral gyrus. The social support was associated with functional connectivity between the dorsal anterior cingulate cortex and the bilateral precentral gyrus/postcentral gyrus as well as the dorsal anterior cingulate cortex and the left middle frontal gyrus. Conclusion: Trauma exposure may result in aberrant local and network-level functional connectivity in individuals with or without post-traumatic stress disorder. Altered amplitude of low-frequency fluctuation in the dorsal anterior cingulate cortex may be a predisposing risk factor for post-traumatic stress disorder development following trauma exposure. More prominent decreased dorsal anterior cingulate cortex functional connectivity with the right hippocampus might be specific in the post-traumatic stress disorder group. Improvement of social support might possibly be significant for post-traumatic stress disorder patients.

Effects of cortisol on memory in women with borderline personality disorder: role of co-morbid post-traumatic stress disorder and major depression

2012 ◽  
Vol 43 (3) ◽  
pp. 495-505 ◽  
Author(s):  
K. Wingenfeld ◽  
M. Driessen ◽  
K. Terfehr ◽  
N. Schlosser ◽  
S. Carvalho Fernando ◽  
...  
Keyword(s):  
Working Memory ◽  
Personality Disorder ◽  
Autobiographical Memory ◽  
Post Traumatic Stress Disorder ◽  
Traumatic Stress ◽  
Memory Retrieval ◽  
Stress Disorder ◽  
Borderline Personality ◽  
Post Traumatic Stress ◽  
Post Traumatic

BackgroundStress and cortisol administration are known to have impairing effects on memory retrieval in healthy humans. These effects are reported to be altered in patients with major depressive disorder (MDD) and post-traumatic stress disorder (PTSD) but they have not yet been investigated in borderline personality disorder (BPD).MethodIn a placebo-controlled cross-over study, 71 women with BPD and 40 healthy controls received either placebo or 10 mg of hydrocortisone orally before undertaking a declarative memory retrieval task (word list learning) and an autobiographical memory test (AMT). A working memory test was also applied.ResultsOverall, opposing effects of cortisol on memory were observed when comparing patients with controls. In controls, cortisol had impairing effects on memory retrieval whereas in BPD patients cortisol had enhancing effects on memory retrieval of words, autobiographical memory and working memory. These effects were most pronounced for specificity of autobiographical memory retrieval. Patients with BPD alone and those with co-morbid PTSD showed this effect. We also found that co-morbid MDD influenced the cortisol effects: in this subgroup (BPD + MDD) the effects of cortisol on memory were absent.ConclusionsThe present results demonstrate beneficial effects of acute cortisol elevations on hippocampal-mediated memory processes in BPD. The absence of these effects in patients with co-morbid MDD suggests that these patients differ from other BPD patients in terms of their sensitivity to glucocorticoids (GCs).

scholarly journals Working memory, cortical dopamine tone, and frontoparietal brain recruitment in post-traumatic stress disorder: a randomized controlled trial

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Andrew J. Westphal ◽  
Michael E. Ballard ◽  
Nicholas Rodriguez ◽  
Taylor A. Vega ◽  
Mark D’Esposito ◽  
...  
Keyword(s):  
Working Memory ◽  
Post Traumatic Stress Disorder ◽  
Traumatic Stress ◽  
Stress Disorder ◽  
Controlled Trial ◽  
Memory Task ◽  
Post Traumatic Stress ◽  
Double Blind ◽  
Cortical Responses ◽  
Post Traumatic

AbstractPost-traumatic stress disorder (PTSD) leads to impairments in both cognitive and affective functioning. Animal work suggests that chronic stress reduces dopamine tone, and both animal and human studies argue that changes in dopamine tone influence working memory, a core executive function. These findings give rise to the hypothesis that increasing cortical dopamine tone in individuals with greater PTSD symptomatology should improve working memory performance. In this pharmacological functional magnetic resonance imaging (fMRI) study, 30 US military veterans exhibiting a range of PTSD severity completed an emotional working memory task. Each subject received both placebo and the catechol-O-methyl transferase inhibitor tolcapone, which increases cortical dopamine tone, in randomized, double-blind, counterbalanced fashion. Mnemonic discriminability (calculated with d′, an index of the detectability of working memory signals) and response bias were evaluated in the context of task-related brain activations. Subjects with more severe PTSD showed both greater tolcapone-mediated improvements in d′ and larger tolcapone-mediated reductions in liberally-biased responding for fearful stimuli. FMRI revealed that tolcapone augmented activity within bilateral frontoparietal control regions during the decision phase of the task. Specifically, tolcapone increased cortical responses to fearful relative to neutral stimuli in higher severity PTSD subjects, and reduced cortical responses to fearful stimuli for lower severity PTSD subjects. Moreover, tolcapone modulated prefrontal connectivity with areas overlapping the default mode network. These findings suggest that enhancing cortical dopamine tone may represent an approach to remediating cognitive and affective dysfunction in individuals with more severe PTSD symptoms.

scholarly journals Post-traumatic stress disorder is associated with altered modulation of prefrontal alpha band oscillations during working memory

2019 ◽  
Vol 130 (10) ◽  
pp. 1869-1881 ◽  
Author(s):  
Mihai Popescu ◽  
Elena-Anda Popescu ◽  
Thomas J. DeGraba ◽  
David J. Fernandez-Fidalgo ◽  
Gerard Riedy ◽  
...  
Keyword(s):  
Working Memory ◽  
Post Traumatic Stress Disorder ◽  
Traumatic Stress ◽  
Stress Disorder ◽  
Alpha Band ◽  
Post Traumatic Stress ◽  
Post Traumatic
Sign in / Sign up

Export Citation Format

Share Document