Die Lage der Innervationszonen von Skelettmuskeln beeinflusst maßgeblich die Signalqualität und Interpretation von Oberflächen-Elektromyografie-(EMG-)Messungen. Da sich durch Gelenkbewegungen Veränderungen der Muskelgeometrie ergeben können, ist davon auszugehen, dass auch die Position der Innervationszonen…
Die Rumpfmuskulatur ist zentral für die Körperhaltung und Stabilisierung der Wirbelsäule. Störungen, etwa durch Fehlbelastungen, können zu Rückenschmerzen führen. Die Oberflächen-Elektromyographie (OEMG) wird häufig zur Untersuchung der Muskelaktivität eingesetzt, ist jedoch durch methodische und individuelle…
Facial synkinesis (FS) is a facial muscle coordination disorder following facial paralysis. We hypothesized that FS involves the entire network of facial muscles on both sides of the face. Bilateral facial high-resolution surface electromyography (HR-sEMG), using a total of 58 electrodes, was performed…
London: Macmillan Publishers Limited, part of Springer Nature, 2026-01-14
Abdominal muscles play a crucial role in spinal stability which may be altered by muscular fatigue. To assess the extent of current fatigue, subjective and objective parameters can be used. The aim of the present study was to investigate whether different perceived exertion levels correspond with changes…
Measurement data serve as an objective basis for scientific findings. Therefore, their reliability in repeated measurements is a crucial prerequisite. The repeatability of measurements is quantified using various reliability parameters. Often, data are subjected to normalization procedures to reduce…
London: Macmillan Publishers Limited, part of Springer Nature, 2025-09-25
Objective While psychological factors are known to influence physical performance, responses to unexpectedly extended endurance tasks remain unclear. Methods In a crossover-randomized study, 37 participants performed an isometric endurance task twice, with a 14-day interval, compensating for 50% of upper…
Lausanne: Frontiers Research Foundation, 2025-08-27
In der vorliegenden Arbeit wurden zwei OEMG-Schemata zur elektromyographischen Messung der Gesichtsmuskulatur – das Schema nach Fridlund und Cacioppo (USA) sowie das Schema nach Kuramoto et al. (Japan) – systematisch miteinander verglichen. Im ersten Schema wurden insgesamt elf Elektrodenpaare pro Gesichtshälfte…
Die vorliegende Arbeit beschäftigt sich mit der Etablierung einer klinischen Teststrecke zur Beurteilung der Standstabilität mit Fokus auf Freizeitkampfsportler bzw. Freizeitkampfkünstler. Über einen Zeitraum von drei Jahren konnten 18 Kampfsportler und 9 Personen einer Kontrollgruppe untersucht werden.…
Background : Subjective rating scales of perceived exertion are often used to quantify effort levels during various endurance exercises, particularly submaximal tasks. The aim of the current study was to determine whether predictive conclusions can be drawn from perceived exertion levels surveyed at…
The design of human-machine interfaces of occupational exoskeletons is essential for their successful application, but at the same time demanding. In terms of information gain, biosensoric methods such as surface electromyography (sEMG) can help to achieve intuitive control of the device, for example…
Hysteresis refers to a physical phenomenon in which the response or state of a system depends on both the input variable and its history. Hysteresis phenomena are also observed in biological systems and have been described for the sensorimotor system. The aim of the present study was to determine whether…
Lawrence, Kanada / San Francisco, Calif.: Public Library of Science (PLoS), 2024
Abstract High-resolution facial surface electromyography (HR-sEMG) is suited to discriminate between different facial movements. Whether HR-sEMG also allows a discrimination among the six basic emotions of facial expression is unclear. 36 healthy participants (53% female, 18–67 years) were included for…
London: Macmillan Publishers Limited, part of Springer Nature, 2023-11-06
Abstract Introduction This study analysed the impact of general purpose progressive addition lenses (GP‐PALs) and computer progressive addition lenses (PC‐PALs) on the activity of the trapezius muscle during computer operation. Methods In this randomised, single‐blinded, crossover study, surface electromyography…
Die Bedeutung muskuloskelettaler Krankheitsbilder ist bereits jetzt enorm und wird durch den demographischen Wandel weiter zunehmen. Ein innovativer therapeutischer Ansatz zur verbesserten Standstabilität und Gangökonomie könnte die Gangjustierhilfe sein, die eine funktionelle Revision des Fußgewölbes…
Introduction: There is need of a clinical assessment measuring locomotory differentiation ability. Objective: The Target-Step-Test (TST) for evaluating the locomotory differentiation ability should be checked for its reliability in the context of practical application. Furthermore, it is necessary to…
Recreational sports are becoming increasingly important in overcoming the drawbacks of our modern sedentary lifestyle. We wanted to know whether ambitious strength or endurance training has a systematic effect on the maximum strength capacity of the trunk muscles compared to no sport at all. We investigated…
Abstract Introduction In this interventional study, the ergonomic workplace set‐up and the impact of character size on subjectively estimated working productivity and computer vision syndrome (CVS) were evaluated in the field. Methods The number of displays and their size, resolution, surface structure,…
Hintergrund und Ziele: Psychische bzw. motivationale Faktoren können nachweislich die physische Leistungsfähigkeit beeinflussen. Dies wurde v.a. bei Ausdauerleistungen beobachtet. Noch nicht systematisch untersucht wurde der Sachverhalt, was bei einer Verlängerung bzw. Fortführung einer vermeintlich…
Objectives Surface electromyography (sEMG) is a standard method for psycho-physiological research to evaluate emotional expressions or in a clinical setting to analyze facial muscle function. High-resolution sEMG shows the best results to discriminate between different facial expressions. Nevertheless,…
Lausanne: Frontiers Research Foundation, 2023-03-13
Previous data suggest a correlation between the cross-sectional area of Type II muscle fibers and the degree of non-linearity of the EMG amplitude–force relationship (AFR). In this study we investigated whether the AFR of back muscles could be altered systematically by using different training modalities.…