ArticleAttention and regional cerebral blood flow in posttraumatic stress disorder patients with substance abuse histories
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2021, Journal of Psychiatric ResearchCitation Excerpt :Therefore, older adults who retain this region may be spared from potential cognitive decline. In fact, a number of post traumatic stress disorder (PTSD) studies have reported impairments in the functional connectivity of PCC-related networks as measured by functional MRI and resting cerebral blood flow, and these impairments were associated with both the risk and severity of this disorder (Semple et al., 1996; Eckart et al., 2011; Bluhm et al., 2009; Zhou et al., 2012). In addition, the neural networks of three cortical midline structures (i.e., the PCC, precuneus, and mPFC) in the recovery phase after stress might contribute to behavioral homeostasis against stress, which further deal well with the additional stress following the initial stress response (Veer et al., 2011).
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2017, Drug and Alcohol DependenceCitation Excerpt :Although prior studies have used positron emission tomography (PET) to examine resting regional perfusion in PTSD Veterans with cocaine and alcohol abuse history, the earlier technology did not permit assessment of dynamic functional connectivity among nodes of motivational neurocircuitry. These studies (Semple et al., 1996, 2000) detected increased resting perfusion in patients versus controls in the amygdala, but the difference was no longer significant after controlling for multiple comparisons. These early PET studies highlight the need for formal examination of amygdala resting-state functional connectivity (RSFC) with the new technology of BOLD fMRI.
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