Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/29706

TitlePlasticity of resting state brain networks in recovery from stress
Author(s)Marques, Fernanda
Palha, Joana Almeida
Cerqueira, João José
Soares, José Miguel
Sousa, Nuno
Santos, Nadine Correia
Sampaio, Adriana
Ferreira, Luís Miguel
Marques, Paulo César Gonçalves
KeywordsResting state networks
Functional connectivity
Deactivation
Recovery from stress
Plasticity
Issue dateDec-2013
PublisherFrontiers Media
JournalFrontiers in Human Neuroscience
Abstract(s)Chronic stress has been widely reported to have deleterious impact in multiple biological systems. Specifically, structural and functional remodeling of several brain regions following prolonged stress exposure have been described; importantly, some of these changes are eventually reversible. Recently, we showed the impact of stress on resting state networks (RSNs), but nothing is known about the plasticity of RSNs after recovery from stress. Herein, we examined the "plasticity" of RSNs, both at functional and structural levels, by comparing the same individuals before and after recovery from the exposure to chronic stress; results were also contrasted with a control group. Here we show that the stressed individuals after recovery displayed a decreased resting functional connectivity in the default mode network (DMN), ventral attention network (VAN), and sensorimotor network (SMN) when compared to themselves immediately after stress; however, this functional plastic recovery was only partial as when compared with the control group, as there were still areas of increased connectivity in dorsal attention network (DAN), SMN and primary visual network (VN) in participants recovered from stress. Data also shows that participants after recovery from stress displayed increased deactivations in DMN, SMN, and auditory network (AN), to levels similar to those of controls, showing a normalization of the deactivation pattern in RSNs after recovery from stress. In contrast, structural changes (volumetry) of the brain areas involving these networks are absent after the recovery period. These results reveal plastic phenomena in specific RSNs and a functional remodeling of the activation-deactivation pattern following recovery from chronic-stress, which is not accompanied by significant structural plasticity.
TypeArticle
URIhttp://hdl.handle.net/1822/29706
DOI10.3389/fnhum.2013.00919
ISSN1662-5161
Publisher versionhttp://www.frontiersin.org
Peer-Reviewedyes
AccessOpen access
Appears in Collections:ICVS - Artigos em Revistas Internacionais com Referee

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