Journal
ACTA PSYCHIATRICA SCANDINAVICA
Volume 132, Issue 5, Pages 365-378Publisher
WILEY
DOI: 10.1111/acps.12418
Keywords
post-traumatic stress disorder; fMRI; intrinsic functional connectivity
Categories
Funding
- Canadian Institute of Health Research
Ask authors/readers for more resources
ObjectiveTo investigate the functional connectivity of large-scale intrinsic connectivity networks (ICNs) in post-traumatic stress disorder (PTSD) during subliminal and supraliminal presentation of threat-related stimuli. MethodGroup independent component analysis was utilized to study functional connectivity within the ICNs most correlated with the Default-mode Network (DMN), Salience Network (SN), and Central Executive Network (CEN) in PTSD participants (n=26) as compared to healthy controls (n=20) during sub- and supraliminal processing of threat-related stimuli. ResultsComparing patients with PTSD with healthy participants, prefrontal and anterior cingulate cortex involved in top-down regulation showed increased integration during subliminal threat processing within the CEN and SN and during supraliminal threat processing within the DMN. The right amygdala showed increased connectivity with the DMN during subliminal processing in PTSD as compared to controls. Brain regions associated with self-awareness and consciousness exhibited decreased connectivity during subliminal threat processing in PTSD as compared to controls: the claustrum within the SN and the precuneus within the DMN. ConclusionKey nodes of the ICNs showed altered functional connectivity in PTSD as compared to controls, and differential results characterized sub- and supraliminal processing of threat-related stimuli. These findings enhance our understanding of ICNs underlying PTSD at different levels of conscious threat perception.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available