In this article, we propose a two-step pipeline to explore task-dependent functional coactivations of brain clusters with constraints from the structural connectivity network. In the first step, the pipeline employs a nonparametric Bayesian clustering method that can estimate the optimal number of clusters, cluster assignments of brain regions of interest (ROIs), and the strength of within- and between-cluster connections without any prior knowledge. In the second step, a factor analysis model is applied to functional data with factors defined as the obtained structural clusters and the factor structure informed by the structural network. The coactivations of ROIs and their clusters can be studied by correlations between factors, which can largely differ by ongoing cognitive task. We provide a simulation study to validate that the pipeline can recover the underlying structural and functional network. We also apply the proposed pipeline to empirical data to explore the structural network of ROIs obtained by the Gordon parcellation and study their functional coactivations across eight cognitive tasks and a resting-state condition.
Can the fraught relation between disability and aging ever become untangled? What is the place of the catastrophically disabled in a time when giving voice and being seen are significant lodestars of political activism? And what becomes of the caregivers, who often labor in silence, and who hope to work well enough just to get through another day? This essay draws on the memoirs of Simone de Beauvoir, Annie Ernaux, Amy Bloom, and my own experiences to show the complicated imbrications of age, disability, and caretaking. I attempt to demonstrate through these experiences that age and disability, which appear to be intimately woven together, are oftentimes misleadingly connected. I suggest that an ethic of vulnerability, rather, is a more useful heuristic that avoids collapsing the categories of age and disability together.
Brain Mapping Lab, Department of Biomedical, Dental Sciences and Morphological and Functional Imaging, University of Messina, Messina, Italy. Electronic address:
Olfactory dysfunction, affecting 75-90 % of Parkinson's disease (PD) patients, holds significant predictive value for PD development. Advanced imaging techniques, such as diffusion MRI (dMRI) and functional MRI (fMRI), offer insights into structural and functional changes within olfactory pathways. This review summarizes a decade of research on MRI-based connectivity of the olfactory system in PD, focusing on structural and functional alterations in olfactory brain areas and their links to early olfactory processing changes.
Background: Students' sense of school belonging is important for mental health, physical health, and academic performance. However, some students do not feel as though they belong in their schools. This study investigated Greek secondary school students' perspectives on practices that enhanced their sense of belonging during the COVID-19 pandemic.
Straw incorporation can improve soil fertility and soil structure. While numerous studies have explored the immediate impacts of straw return on soil properties and crop production, the legacy effects of long-term straw return remain less understood. In this study, the straw returning soil of a continuous 15 years （SS） and non-straw returning soil （NS） were collected from Dahe Experimental Station of Hebei Academy of Agriculture and Forestry Sciences in China.
Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; Division of Hematology, The Children's Hospital of Philadelphia, Philadelphia, PA, USA. Electronic address:
How specific enhancer-promoter pairing is established remains mostly unclear. Besides the CTCF/cohesin machinery, few nuclear factors have been studied for a direct role in physically connecting regulatory elements. Using a murine erythroid cell model, we show via acute degradation experiments that LDB1 directly and broadly promotes connectivity among regulatory elements.
