Research Square
December 28, 2023
Joshua M. Poulin, Gregory E. Bigford, Krista L. Lanctôt et al.
1 citation
preprint
Abstract Background: Major Depressive Disorder (MDD) is a leading cause of disability worldwide across domains of health and cognition, affecting overall quality of life. Approximately one third of individuals with depression do not fully respond to treatments (e.g., conventional antidepressants, psychotherapy) and alternative strategies are needed. Recent early phase trials suggest psilocybin...
Translational Psychiatry
December 14, 2023
Ivan Skorodumov, Rainer Spanagel, Jonathan R Reinwald et al.
25 citations
Abstract Alcohol Use Disorder (AUD) adversely affects the lives of millions of people, but still lacks effective treatment options. Recent advancements in psychedelic research suggest psilocybin to be potentially efficacious for AUD. However, major knowledge gaps remain regarding (1) psilocybin’s general mode of action and (2) AUD-specific alterations of responsivity to psilocybin treatment in...
Neuron
December 1, 2023
Joseph Giorgio, Jenna N. Adams, A. Maass et al.
In early Alzheimer's disease (AD) β-amyloid (Aβ) deposits throughout association cortex and tau appears in the entorhinal cortex (EC). Why these initially appear in disparate locations is not understood. Using task-based fMRI and multimodal PET imaging, we assess the impact of local AD pathology on network-to-network interactions. We show that AD pathologies flip interactions between the...
Brain Sciences
November 29, 2023
Yakun Zhang, Shichun Chen, Zongpai Zhang et al.
1 citation
Focused attention meditation (FAM) training has been shown to improve attention, but the neural basis of FAM on attention has not been thoroughly understood. Here, we aim to investigate the neural effect of a 2-month FAM training on novice meditators in a visual oddball task (a frequently adopted task to evaluate attention), evaluated with both ASL and BOLD fMRI. Using ASL, activation was...
Translational Psychiatry
November 11, 2023
Wan Lin Yue, Kwun Kei Ng, Amelia Jialing Koh et al.
32 citations
Mindfulness-based interventions are showing increasing promise as a treatment for psychological disorders, with improvements in cognition and emotion regulation after intervention. Understanding the changes in functional brain activity and neural plasticity that underlie these benefits from mindfulness interventions is thus of interest in current neuroimaging research. Previous studies have...
Brain Structure and Function
November 2023
Tahereh S Zarghami
Network representation has been an incredibly useful concept for understanding the behavior of complex systems in social sciences, biology, neuroscience, and beyond. Network science is mathematically founded on graph theory, where nodal importance is gauged using measures of centrality. Notably, recent work suggests that the topological centrality of a node should not be over-interpreted as its...
Network Neuroscience
November 1, 2023
Juan Carlos Farah, Pablo Mallaroni, Enrico Amico et al.
21 citations
Abstract The emerging neuroscientific frontier of brain fingerprinting has recently established that human functional connectomes (FCs) exhibit fingerprint-like idiosyncratic features, which map onto heterogeneously distributed behavioral traits. Here, we harness brain-fingerprinting tools to extract FC features that predict subjective drug experience induced by the psychedelic psilocybin....
BMC Psychiatry
October 17, 2023
Paul A Bloom, David Pagliaccio, Jiahe Zhang et al.
17 citations
Adolescence is characterized by a heightened vulnerability for Major Depressive Disorder (MDD) onset, and currently, treatments are only effective for roughly half of adolescents with MDD. Accordingly, novel interventions are urgently needed. This study aims to establish mindfulness-based real-time fMRI neurofeedback (mbNF) as a non-invasive approach to downregulate the default mode network...
Brain Research Bulletin
October 15, 2023
Saampras Ganesan, Bradford A. Moffat, Nicholas T. van Dam et al.
13 citations
Mapping the neurobiology of meditation has been bolstered by functional MRI (fMRI) research, with advancements in ultra-high field 7 Tesla fMRI further enhancing signal quality and neuroanatomical resolution. Here, we utilize 7 Tesla fMRI to examine the neural substrates of meditation and replicate existing widespread findings, after accounting for relevant physiological confounds. In this...
Neuroreport
October 4, 2023
William D. S. Killgore, Samantha Jankowski, Kymberly Henderson-Arredondo et al.
19 citations
Insomnia is often accompanied by excessive pre-sleep rumination. Such ruminative thinking is also associated with increased connectivity of the default mode network (DMN). It is likely that DMN connectivity and associated rumination contribute to the pathogenesis of insomnia. We hypothesized that resting state functional connectivity (rsFC) between the DMN and other brain regions prior to...
bioRxiv
October 2, 2023
Nicholas Souter, Antonia De Freitas, Meichao Zhang et al.
preprint
The default mode network (DMN) lies towards the heteromodal end of the principal gradient of intrinsic connectivity, maximally separated from sensory-motor cortex. It supports memory-based cognition, including the capacity to retrieve conceptual and evaluative information from sensory inputs, and to generate meaningful states internally; however, the functional organisation of DMN that can...
Brain and Behavior
October 2023
Doaa G Ali, Ahmed A Bahrani, Riham H El Khouli et al.
Cerebral small vessel disease (SVD) has been suggested to contribute to the pathogenesis of Alzheimer's disease (AD). Yet, the role of SVD in potentially contributing to AD pathology is unclear. The main objective of this study was to test the hypothesis that WMHs influence amyloid β (Aβ) levels within connected default mode network (DMN) tracts and cortical regions in cognitively unimpaired...
Neuroscience Letters
September 25, 2023
Tohru Kodama, Takashi Kojima, Yoshiko Honda et al.
Neuroimaging studies have demonstrated the presence of a default mode network (DMN) which shows greater activity during rest, and an executive network (EN) which is activated during cognitive tasks. DMN and EN are thought to have competing functions. However, recent studies reported that the two networks show coactivation during some cognitive tasks. To clarify how DMN works and how DMN...
Restorative Neurology and Neuroscience
September 16, 2023
Inbal Linchevski, Amber Maimon, Yulia Golland et al.
2 citations
BACKGROUND: The default mode network (DMN) is a large-scale brain network tightly correlated with self and self-referential processing, activated by intrinsic tasks and deactivated by externally-directed tasks. OBJECTIVE: In this study, we aim to investigate the novel approach of default mode activation during progressive muscle relaxation and examine whether differential activation patterns...
Human Brain Mapping
September 15, 2023
Alexander N. Silchenko, Felix Hoffstaedter, Simon Bodo Eickhoff
5 citations
Interactions within brain networks are inherently directional, which are inaccessible to classical functional connectivity estimates from resting-state functional magnetic resonance imaging (fMRI) but can be detected using spectral dynamic causal modeling (DCM). The sample size and unavoidable presence of nuisance signals during fMRI measurement are the two important factors influencing the...
Network Neuroscience
September 15, 2023
Daniela Jardim Pereira, João Pereira, Alexandre Sayal et al.
5 citations
Abstract Real-time functional magnetic resonance imaging (rt-fMRI) neurofeedback (NF), a training method for the self-regulation of brain activity, has shown promising results as a neurorehabilitation tool, depending on the ability of the patient to succeed in neuromodulation. This study explores connectivity-based structural and functional success predictors in an NF n-back working memory...
bioRxiv
September 1, 2023
Trang-Anh Estelle Nghiem, Byeongwook Lee, Tzu-Hao Harry Chao et al.
preprint
The default mode network (DMN) is a large-scale brain network known to be suppressed during a wide range of cognitive tasks. However, our comprehension of its role in naturalistic and unconstrained behaviors has remained elusive because most research on the DMN has been conducted within the restrictive confines of MRI scanners. Here we use multisite GCaMP fiber photometry with simultaneous...
Neuroscience & Biobehavioral Reviews
September 1, 2023
Carla Soares, Gerardo Gonzalo, João Castelhano et al.
The Default Mode Network (DMN) and the Theory of Mind (ToM) networks play a crucial role in our understanding of the neurocognition of the self. The DMN is commonly associated with introspection, while the ToM is involved in perspective-taking. There is no research investigating the overlap between the DMN and ToM in relation to causal effects such as induced by psychedelics, and their precise...
Scientific Reports
August 30, 2023
Chao S. Hu, Yanbin Zheng, Guang-Heng Dong et al.
Default mode network (DMN) may be associated with wisdom (i.e., mature understanding of life featured by perspectival metacognition) when advising from a self-referential perspective due to the involvement of the DMN in reflecting on personal life experiences. After a resting-state functional MRI scan, 52 adults advised some youths going through life dilemmas, half from a second-person...
Brain Sciences
August 26, 2023
Shinyoung Jung, Joo Yeon Kim, Suhyeon Jo et al.
Adaptive behavior in the environment requires a high level of cognitive control to bias limited processing resources to behaviorally significant stimuli. Such control has been associated with a set of brain regions located in the fronto-parietal cortex (multiple demand network), whose activity was found to increase as the control demand for a task increases. In contrast, another set of regions,...