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Exploring imitation of within hand prehensile object manipulation using fMRI and graph theory analysis.
Sci Rep
January 2025
Support Centre for Advanced Neuroimaging (SCAN), Institute for Diagnostic and Interventional Neuroradiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
This study aims to establish an imitation task of multi-finger haptics in the context of regular grasping and regrasping processes during activities of daily living. A video guided the 26 healthy, right-handed volunteers through the three phases of the task: (1) fixation of a hand holding a cuboid, (2) observation of the sensori-motor manipulation, (3) imitation of that motor action. fMRI recorded the task; graph analysis of the acquisitions revealed the associated functional cerebral connectivity patterns.
View Article and Find Full Text PDFContrasting drought sensitivity of Eurasian and North American grasslands.
Nature
January 2025
School of Life Sciences, Hebei University, Baoding, China.
Extreme droughts generally decrease productivity in grassland ecosystems with negative consequences for nature's contribution to people. The extent to which this negative effect varies among grassland types and over time in response to multi-year extreme drought remains unclear. Here, using a coordinated distributed experiment that simulated four years of growing-season drought (around 66% rainfall reduction), we compared drought sensitivity within and among six representative grasslands spanning broad precipitation gradients in each of Eurasia and North America-two of the Northern Hemisphere's largest grass-dominated regions.
View Article and Find Full Text PDFOccurrence and allele frequencies of genetic variants associated with Varroa drone brood resistance (DBR) in African Apis mellifera subspecies.
J Invertebr Pathol
January 2025
Laboratory of Molecular Entomology and Bee Pathology (L-MEB), Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, Ghent, Belgium.
The ectoparasite Varroa destructor is a major contributor to the global decline of honeybee colonies (Apis mellifera), especially in the Northern Hemisphere. However, Varroa-resistant honeybee populations have been reported in various regions around the globe, including Europe and Africa. This resistance is primarily attributed to the trait known as Suppressed Mite Reproduction (SMR), which significantly reduces the reproductive success of Varroa mites within these colonies.
View Article and Find Full Text PDFComprehensive analysis of the cerebellar vasculature of dromedary camels ().
Front Vet Sci
January 2025
Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al Ain, United Arab Emirates.
The current study performed a comprehensive assessment of blood supply in the cerebellum of dromedary camels. To the best of our knowledge, this study is the first to provide detailed information about the origins, routes, and complicated patterns of branching in the rostral and caudal cerebellar arteries of dromedary camels. In total, 55 heads from male dromedary camels aged 2-6 years were analyzed using advanced casting techniques.
View Article and Find Full Text PDFExtension of T Hyperintense Areas in Patients With a Glioma: A Comparison Between High-Quality 7 T MRI and Clinical Scans.
NMR Biomed
March 2025
Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands.
Gliomas are highly heterogeneous and often include a nonenhancing component that is hyperintense on T weighted MRI. This can often not be distinguished from secondary gliosis and surrounding edema. We hypothesized that the extent of these T hyperintense areas can more accurately be determined on high-quality 7 T MRI scans.
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