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3D reconstruction of shoulder muscles in hominoid primates: Correlating scapular attachment areas with muscle volume.
J Anat
January 2025
Department of Development and Regeneration, KU Leuven, Leuven, Belgium.
Digital muscle reconstructions have gained attraction in recent years, serving as powerful tools in both educational and research contexts. These reconstructions can be derived from various 2D and 3D data sources, enabling detailed anatomical analyses. In this study, we evaluate the efficacy of surface scans in accurately reconstructing the volumes of the rotator cuff and teres major muscles across a diverse sample of hominoids.
View Article and Find Full Text PDFSystemically circulating 17β-estradiol enhances the neuroprotective effect of the smoking cessation drug cytisine in female parkinsonian mice.
NPJ Parkinsons Dis
January 2025
Department of Neuroscience & Experimental Therapeutics, Texas A&M University College of Medicine, 8447 John Sharp Pkwy, Bryan, TX, 77807-3260, USA.
The smoking cessation drug cytisine exerts neuroprotection in substantia nigra pars compacta (SNc) dopaminergic (DA) neurons of female but not male 6-hydroxydopamine (6-OHDA) lesioned parkinsonian mice. To address the important question of whether circulating 17β-estradiol mediates this effect, we employ two mouse models aimed at depleting systemically circulating 17β-estradiol: (i) bilateral ovariectomy (OVX), and (ii) aromatase inhibition with systemically administered letrozole. In both models, depleting systemically circulating 17β-estradiol in female 6-OHDA lesioned parkinsonian mice results in the loss of cytisine-mediated neuroprotection as measured using apomorphine-induced contralateral rotations and SNc DA neurodegeneration.
View Article and Find Full Text PDFMidterm comparative result of absorbable screws and metal screws in pediatric medial humeral epicondyle fracture.
J Orthop Sci
January 2025
Department of Pediatric Orthopedics, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, Hunan, 410013, China.
Backgroud: Medial humeral epicondyle fracture is a prevalent type of upper limb fractures in pediatric patients. This study aims to compare the follow-up clinical results and complications in 30 children with medial epicondyle fractures who were treated with either metal screws or absorbable screws at our hospital.
Methods: A retrospective review was conducted on 30 children with medial humeral epicondyle fractures, who were divided into two groups: Metal group (18 children) underwent fixation using metal screws, while Absorbable group (12 children) received absorbable screws between January 2016 and June 2024.
Rotational Locking of Charged Microparticles in Quadrupole Ion Traps.
Phys Rev Lett
December 2024
Laboratoire De Physique de l'École Normale Supérieure, ENS, PSL, CNRS, Sorbonne Université, Université de Paris, 24 rue Lhomond, 75005 Paris, France.
Article Synopsis
- Electric quadrupole traps effectively levitate charged objects, from protons to small particles, influencing their rotational behavior when charge distribution varies.
- Experiments reveal a shift in motion for microparticles, transitioning from librational to synchronized rotation with the trap drive due to torque effects from the electric quadrupole.
- This technique showcases versatility by spinning various particles like silicon microrods and microdiamonds, with the latter enabling detailed motion analysis through embedded nitrogen vacancy centers, promising advances in levitated quantum nanomechanics.
Condensation and Synchronization in Aligning Chiral Active Matter.
Phys Rev Lett
December 2024
Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, China.
We show that spontaneous density segregation in dense systems of aligning circle swimmers is a condensation phenomenon at odds with the phase separation scenarios usually observed in two-dimensional active matter. The condensates, which take the form of vortices or rotating polar packets, can absorb a finite fraction of the particles in the system, and keep a finite or slowly growing size as their mass increases. Our results are obtained both at particle and continuous levels.
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