Background: Astronauts frequently experience back pain during and after spaceflight. The aim of this study was to utilize clinical methods to identify potential vertebral somatic dysfunction (VD) in subjects exposed to dry immersion (DI), a model of microgravity simulation.
Method: The experiment was performed in a space research clinic, respecting all the ethical rules, with subjects completing three days of dry immersion ( = 11). Assessments of VD, spine height, and back pain were made before and after simulated microgravity.
Results: Back pain was present in DI with great global discomfort during the entire protocol. A low positive correlation was found (Pearson = 0.44; < 0.001) between VD before DI and pain developed in the DI experiment.
Conclusions: There is a specific location of pain in both models of simulation. Our analysis leads to relativizing constraints on musculoskeletal system in function of simulation models. This study was the first to examine manual palpation of the spine in a space experience. Additionally, osteopathic view may be used to select those individuals who have less risk of developing back pain.
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http://dx.doi.org/10.1155/2017/9602131 | DOI Listing |
ACS Appl Mater Interfaces
January 2025
Department of Materials Design and Innovation, University at Buffalo, Buffalo, New York 14260-1660, United States.
This study presents a hybrid microfiltration technology designed for high-performance lead (Pb(II)) remediation, especially from aqueous solutions with high Pb(II) concentrations, by utilizing two-dimensional (2D) TiCT-MXene layers deposited on dry mycelium membranes. The hybrid TiCT-MXene/mycelium (MyMX) membranes were fabricated via a single-step electrochemical deposition (ECD) technique, which enabled a uniform coating of 2D TiCT-MXene onto individual hyphal fibers of a prefabricated mycelium membrane. Optimized ECD parameters for high Pb(II) uptake were identified using scanning electron microscopy and energy-dispersive X-ray spectroscopy.
View Article and Find Full Text PDFEnviron Technol
January 2025
Jinan Licheng District Tongda municipal Engineering Department, Jinan, People's Republic of China.
To enhance the water stability and bearing capacity of the Shandong Ming Dong Expressway's soaked subgrade, carbide slag (CS) and coal gangue powder (CG) were used as stabilisers. Stabiliser dosages of 5%, 10%, and 15%, with the CS:CG ratios of 0:100, 30:70, 50:50, 70:30, and 100:0, were tested. The study evaluated the performance of CS-CG stabilised soil through unconfined compressive strength (UCS) tests at 7 and 28 days, six dry-wet cycles, a 30-day water immersion test, pH test, swell rate test, XRD, SEM, and MIP analyses.
View Article and Find Full Text PDFJ Dent
January 2025
University of Saskatchewan, College of Dentistry. 107 Wiggins Rd, Saskatoon, SK, Canada. S7N 5E5. Electronic address:
Bulk-fill, monochromatic, and ORMOCER composites were introduced in restorative dentistry with the aim of reducing clinical time and/or alleviating contraction stresses at the interface between the tooth and restoration. While the conversion and immediate properties of these materials are comparable to conventional composites, studies evaluating their long-term properties and the structure of the polymer matrix are lacking. The objective of this study was to evaluate the degree of conversion and, indirectly, the crosslink density of conventional, bulk-fill, monochromatic, and ORMOCER resin composites.
View Article and Find Full Text PDFStomatologiia (Mosk)
January 2025
A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Moscow, Russia.
The Purpose: Of the study was to assess oral microbiocenosis changes in participants of microgravity modeling in a control group and using prophylaxis in the form of a probiotic supplement with 1.0·10 CFU of strain in one lozenge and a dairy product containing not less than 1·10 CFU of s strain in one gram.
Materials And Methods: The study included 15 participants aged 25-40 years from the "Dry Immersion-2018" experiment.
Med Sci Sports Exerc
January 2025
FAME Laboratory, Department of Physical Education and Sport Science, University of Thessaly, GREECE.
Purpose: Exercise-induced heat acclimation can mitigate age-related reductions in heat-loss capacity, though performing repeated bouts of strenuous exercise in the heat may be untenable for many older adults. While short-term passive heat acclimation (e.g.
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