Background: The literature on the 3D kinematics of the knee suggests that the gesture accomplished during kinematic assessment might play a significant role in the values measured. The purpose of this study is to demonstrate that a standardized gesture leads to an increased reproducibility in 3D kinematic measurements of the knee.
Methods: Seventeen healthy male subjects performed series of knee-bends in standardized and unconstrained conditions while their left knee's 3D kinematics were recorded using an optical motion-recording system. Standardized knee-bends were performed in a specially designed structure stabilizing the shoulders, pelvis and feet. Coefficient of multiple correlation were calculated for the ascent and the descent phases of the knee-bends for the tibial rotation and abduction/adduction components of the knee movement.
Findings: Comparisons between coefficient of multiple correlation of the different gesture conditions showed a statistically significant increase in reproducibility for the tibial rotation during the standardized knee-bends.
Interpretation: It appears that gesture standardization is an interesting option to consider for precise kinematic assessment of the living human knee.
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http://dx.doi.org/10.1016/j.clinbiomech.2005.12.007 | DOI Listing |
Bioengineering (Basel)
January 2025
Human Performance Laboratory, Centre of Space Bio-Medicine, Department of Medicine Systems, University of Rome Tor Vergata, 00133 Rome, Italy.
Traditional methods for evaluating tennis technique, such as visual observation and video analysis, are often subjective and time consuming. On the other hand, a quick and accurate assessment can provide immediate feedback to players and contribute to technical development, particularly in less experienced athletes. This study aims to validate the use of a single inertial measurement system to assess some relevant technical parameters of amateur players.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
January 2025
Department of Psychology, University of Chicago, Chicago, IL 60637.
Despite increased attempts to express equality in speech, biases often leak out through subtle linguistic cues. For example, the subject-complement statement (SCS, "Girls are as good as boys at math") is used to advocate for equality but often reinforces gender stereotypes (boys are the standard against which girls are judged). We ask whether stereotypes conveyed by SCS can be counteracted by gesture.
View Article and Find Full Text PDFClin Biomech (Bristol)
January 2025
Faculty of Mechanical Engineering (FEMEC), Federal University of Uberlândia, Uberlândia, MG, Brazil.
Background: Wheelchair users face various health issues, such as cardiac problems, obesity, tissue deformation, and shoulder and wrist injuries. Although the subject of ergometry is known since 1912 and the mechanic of propulsion gesture and wheelchair configuration has been studied over the years, most of the equipment found in the literature are adaptations or lack the tools for standardization of techniques. This paper aims to conduct biomechanical validation of a new wheelchair ergometer (ERGO1) designed for assessing physical fitness and muscle training of the upper limbs of people with disabilities.
View Article and Find Full Text PDFCogn Neurodyn
December 2025
Shanghai University, Shanghai, China.
Neurodynamic observations indicate that the cerebral cortex evolved by self-organizing into functional networks, These networks, or distributed clusters of regions, display various degrees of attention maps based on input. Traditionally, the study of network self-organization relies predominantly on static data, overlooking temporal information in dynamic neuromorphic data. This paper proposes Temporal Self-Organizing (TSO) method for neuromorphic data processing using a spiking neural network.
View Article and Find Full Text PDFChildren (Basel)
December 2024
Department of Neuroscience, IRCCS Children's Hospital Bambino Gesù, Piazza Sant'Onofrio, 4, 00165 Rome, Italy.
: Gestural production, a crucial aspect of nonverbal communication, plays a key role in the development of verbal and socio-communicative skills. Delays in gestural development often impede verbal acquisition and social interaction in children with Autism Spectrum Disorder (ASD). Although various interventions for ASD focus on improving socio-communicative abilities, they consistently highlight the importance of integrating gestures to support overall communication development.
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