Objective: For the evaluation of neck injury the relative distance was observed between a marker placed on the forehead and a marker placed on the shoulder and also by change of the angle. To compare the severity of head injury a value of maximum head acceleration was used, HIC and a 3 ms criterion. All criteria were related to the activity of musculus sternocleidomastoideus and musculus trapezius in a situation of expected or unexpected impact.
Materials And Methods: The situation was recorded using a Qualisys system, head acceleration of probands in three axes was recorded using the accelerometer, activity of neck muscles was monitored by a mobile EMG.
Results: Maximum head acceleration was 12.1 g for non-visual and 8.2 g for visual. HIC36 was 5.7 non visual and 4.0 for visual. 3-ms criterion was 11.5 g for non-visual and 7.8 g for visual. The average time of muscle activation of the observed group without visual perception is 0.027 s after hitting an obstacle, with visual perception 0.127 s before the crash.
Conclusions: Kinematic values indicate more favourable parameters for neck injuries for visual. Head injury criteria show an average decrease of about 30% for visual. We can conclude that the visual perception means a significant increase in pre-activation of the observed muscle group of almost 400% and lower activation in both following phases of approximately 40%.
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Aerosp Med Hum Perform
November 2024
Introduction: As next-generation space exploration missions require increased autonomy from crews, real-time diagnostics of astronaut health and performance are essential for mission operations, especially for determining extravehicular activity readiness. An augmented reality (AR) system may be a viable tool allowing holographic visual cueing to replace physical objects used in traditional assessments.
Methods: In this study, 20 healthy adults were compared in an Ingress and Egress Task and Obstacle Weave Task with holographic and physical objects to determine the effect of AR on performance.
Biochem Biophys Res Commun
December 2024
Department of Internal Medicine 1, Shimane University Faculty of Medicine, 89-1 Enya-cho, Izumo, Shimane, 693-8501, Japan; The Center for Integrated Kidney Research and Advance, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo, 693-8501, Japan. Electronic address:
Inhibition of xanthine oxidoreductase (XOR) was shown to ameliorate the stroke susceptibility in the stroke-prone spontaneously hypertensive rat (SHRSP), suggesting hyperuricemia had a pathological role in this rat model. In this study, we thus aimed to explore mechanisms inducing hyperuricemia in SHRSP. XOR is known to have two forms, xanthine dehydrogenase (XDH) as the prototype and xanthine oxidase (XO) as the converted form through cleavage of a peptide bond or through formation of disulfide bonds in the enzyme.
View Article and Find Full Text PDFWorld J Surg Oncol
December 2024
Department of Physiotherapy, Universidad Cardenal Herrera-CEU, CEU Universities, Valencia, Spain.
Background: Endoprosthetic knee replacement using megaprostheses has become a common strategy for preserving joint function in patients with distal femur tumors. While existing literature has primarily focused on surgical techniques, complications, and implants, recent improvements in patient survival rates have sparked increased interest in the long-term functional outcomes associated with this treatment.
Methods: This case-control study evaluated functional outcomes-Timed Up and Go (TUG), 6-Minute Walk Test (6MWT), knee flexor and extensor muscle strength, and sagittal knee range of motion-and health-related quality of life (SF-36) between patients with distal femoral megaprostheses (n = 31) and healthy controls (n = 48).
Background: Adaptive radiotherapy (ART) involves the continuous adaptation of the radiation plan according to patient- and tumor-specific feedback. In online ART, the plan is optimized in real time during the treatment; in offline ART, the plan is recalculated between treatment sessions. Hybrid linear accelerators with integrated CT, MRI, or PET are required to perform online ART.
View Article and Find Full Text PDFExp Oncol
December 2024
State Organization «Grigoriev Institute for Medical Radiology and Oncology of the National Academy of Medical Sciences of Ukraine», Kharkiv, Ukraine.
Background: The development of new approaches to modeling tumor radiosensitivity in patients with head and neck squamous cell carcinoma (HNSCC) is an important problem for overcoming tumor radioresistance. New agents for radiomodification are inhibitors of the enzyme cyclooxygenase-2 (COX-2). The study of markers of radioresistance in cancer patients undergoing radiotherapy (RT) in combination with COX-2 inhibitors and chemotherapy may contribute to the effectiveness of RT.
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