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Spine Kinematics Behavior During the Handstand Posture: A Biplanar Radiographic Analysis.
J Funct Morphol Kinesiol
December 2024
Institut de Biomécanique Humaine Georges Charpak, Arts et Métiers Sciences and Technologies, 75013 Paris, France.
The handstand is an exercise performed in many sports, either for its own sake or as part of physical training. Unlike the upright bipedal standing posture, little is known about the sagittal alignment and balance of the spine during a handstand, which may hinder coaching and reduce the benefits of this exercise if not performed correctly. The purpose of this study was to quantify the sagittal alignment and balance of the spine during a handstand using radiographic images to characterize the strategies employed by the spino-pelvic complex during this posture.
View Article and Find Full Text PDFRight middle occipital gyrus is associated with egocentric spatial orientation during body tilt: Evidence from a repetitive transcranial magnetic stimulation study.
Eur J Neurosci
January 2025
Faculty of Psychology, Otemon Gakuin University, Ibaraki, Osaka, Japan.
Accurate perception of the orientation of external objects relative to the body, known as egocentric spatial orientation, is fundamental to performing action. Previously, we found via behavioural and magnetic resonance imaging voxel-based morphometry studies that egocentric spatial orientation is strongly distorted when the whole body is tilted with respect to gravity, and that the magnitude of this perceptual distortion is correlated with the grey matter volume of the right middle occipital gyrus (rMOG). In the present study, we further validated the association between the neural processing in the rMOG and the perceptual distortion by transiently suppressing neural activity in this region using low-frequency repetitive transcranial magnetic stimulation (rTMS) and evaluating the consequent effect on perceptual distortion.
View Article and Find Full Text PDFDynamic Alignment Changes of the Spine, Pelvis, and Lower Limbs during Gait Analyzed Using Inertial Motion Capture in Patients with Adult Spinal Deformity.
Spine Surg Relat Res
November 2024
Department of Orthopaedic Surgery, Dokkyo Medical University, Mibu, Japan.
Introduction: Patients with adult spinal deformity (ASD) lean forward with their trunks when walking, even if they can remain upright during static standing. However, it remains unclear which part of the spinal column is involved in forward trunk tilt and the details of the relationships between sagittal alignment during static standing and changes in dynamic parameters during walking. Therefore, this study aimed to clarify the above by analyzing the walking motion of ASD patients using inertial measurement units (IMUs).
View Article and Find Full Text PDFUpright tilt table testing in children and adolescents: An aid to the clinical diagnosis of postural orthostatic tachycardia syndrome.
J Paediatr Child Health
December 2024
Department of Paediatrics, Monash University and University of Melbourne, Melbourne, Victoria, Australia.
Can standing replace upright tilt table testing in the diagnosis of postural tachycardia syndrome (POTS) in the young?
Clin Auton Res
November 2024
Departments of Pediatrics and Physiology, New York Medical College, Valhalla, NY, 10595, USA.
Article Synopsis
- - The study aimed to evaluate the effectiveness of the standing test versus upright tilt in diagnosing postural tachycardia syndrome (POTS) in adolescents, focusing on the relationship between heart rate increases during these tests.
- - It involved 36 POTS patients and 39 healthy volunteers, who performed both standing for 5 minutes and a 10-minute tilt at a 70° angle to compare heart rate responses.
- - Results showed that the standing test was less effective than the tilt test in differentiating POTS patients from healthy controls, suggesting that standing alone is not a reliable diagnostic tool for POTS in individuals under 19 years old.
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