Dataset Information

The Dynamics of Functional Brain Networks Associated With Depressive Symptoms in a Nonclinical Sample.

ABSTRACT: Brain function depends on the flexible and dynamic coordination of functional subsystems within distributed neural networks operating on multiple scales. Recent progress has been made in the characterization of functional connectivity (FC) at the whole-brain scale from a dynamic, rather than static, perspective, but its validity for cognitive sciences remains under debate. Here, we analyzed brain activity recorded with functional Magnetic Resonance Imaging from 71 healthy participants evaluated for depressive symptoms after a relationship breakup based on the conventional Major Depression Inventory (MDI). We compared both static and dynamic FC patterns between participants reporting high and low depressive symptoms. Between-group differences in static FC were estimated using a standard pipeline for network-based statistic (NBS). Additionally, FC was analyzed from a dynamic perspective by characterizing the occupancy, lifetime, and transition profiles of recurrent FC patterns. Recurrent FC patterns were defined by clustering the BOLD phase-locking patterns obtained using leading eigenvector dynamics analysis (LEiDA). NBS analysis revealed a brain subsystem exhibiting significantly lower within-subsystem correlation values in more depressed participants (high MDI). This subsystem predominantly comprised connections between regions of the default mode network (i.e., precuneus) and regions outside this network. On the other hand, LEiDA results showed that high MDI participants engaged more in a state connecting regions of the default mode, memory retrieval, and frontoparietal network (p-FDR = 0.012); and less in a state connecting mostly the visual and dorsal attention systems (p-FDR = 0.004). Although both our analyses on static and dynamic FC implicate the role of the precuneus in depressive symptoms, only including the temporal evolution of BOLD FC helped to disentangle over time the distinct configurations in which this region plays a role. This finding further indicates that a holistic understanding of brain function can only be gleaned if the temporal dynamics of FC is included.

SUBMITTER: Alonso Martinez S

PROVIDER: S-EPMC7530893 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

The Dynamics of Functional Brain Networks Associated With Depressive Symptoms in a Nonclinical Sample.

Alonso Martínez Sonsoles S Deco Gustavo G Ter Horst Gert J GJ Cabral Joana J

Frontiers in neural circuits 20200918

Brain function depends on the flexible and dynamic coordination of functional subsystems within distributed neural networks operating on multiple scales. Recent progress has been made in the characterization of functional connectivity (FC) at the whole-brain scale from a dynamic, rather than static, perspective, but its validity for cognitive sciences remains under debate. Here, we analyzed brain activity recorded with functional Magnetic Resonance Imaging from 71 healthy participants evaluated ...[more]

PMID: 33071760

Similar Datasets

Project description:Background/objectivesDepression screening and treatment for older adults are recommended in Age-Friendly Health Systems. Few studies have evaluated the association between depressive symptoms and postoperative functioning. We aimed to determine the association between varying levels of depressive symptoms in the preoperative setting with postoperative functional recovery.DesignProspective cohort study.SettingTwo academic hospitals in Boston, Massachusetts.ParticipantsSurgical patients aged 70 and older (N = 560).MeasurementsParticipants were assessed preoperatively and 1 year postoperatively. Preoperative evaluation included the 15-item short-form Geriatric Depression Scale (GDS). Results were categorized as low (GDS = 0-1), moderate (2-5), or high (6-15) symptom burden. Primary outcome was 1-year instrumental activities of daily living functional decline. Secondary outcomes included hospital stay longer than 5 days, discharge to post-acute care (PAC) facility, and readmission within 30 days.ResultsMean participant age was 76.6 ± 5 years, 58% were women, 81% underwent an orthopedic operation, 13% gastrointestinal, 6% vascular; 13% had functional decline at 1 year after their operation (by symptom burden: low = 5.5%; moderate = 14.8%, and high = 38.6%). After adjusting for age, sex, and comorbidity, those with moderate or high depressive symptoms demonstrated greater odds of functional decline at 1 year compared with those with a low symptom burden (moderate: adjusted odds ratio [AOR] = 2.7; 95% confidence interval [CI] = 1.3-5.3; high: AOR = 9.3; 95% CI = 4.2-20.6), discharge to PAC facility (moderate: AOR = 1.7; 95%CI = 1.2-2.6; high: AOR = 2.7; 95% CI = 1.4-5.1) but demonstrated no significant association with 30-day readmission or hospital length of stay longer than 5 days.ConclusionGreater burden of preoperative depressive symptoms is associated with increased likelihood of functional decline at 1 year after surgery and of discharge to PAC facility. Preoperative assessment of the burden of depressive symptoms in older adults undergoing elective surgery may be helpful in identifying patients at high risk of poor outcomes.

Dataset Information

The Dynamics of Functional Brain Networks Associated With Depressive Symptoms in a Nonclinical Sample.

Publications

The Dynamics of Functional Brain Networks Associated With Depressive Symptoms in a Nonclinical Sample.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets