Gender dependent EMGs of runners resolved by time/frequency and principal pattern analysis

Tscharner, V. von; Goepfert, Beat

doi:10.1016/s1050-6411(02)00111-6

Cited by 67 publications

(47 citation statements)

References 28 publications

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“…Beaulieu et al (2008) showed that during running, with unanticipated changes of direction, women showed lower values than men for the instantaneous mean frequency in hamstrings muscles. Similar results were presented by von Tscharner and Goepfert (2003) and White et al (2003) during running tasks and knee flexion/extension on an isokinetic dynamometer, respectively. These authors concluded that these muscle recruitment strategies reduce the efficiency of the muscles around the knee in generating co-contraction and, consequently, stabilize the joint, pre-disposing women to ACL injuries.…”

Section: Introductionsupporting

confidence: 86%

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Differences in time–frequency representation of lower limbs myoelectric activity during single and double leg landing in male athletes

Leporace

Pereira

Nadal

et al. 2011

Journal of Electromyography and Kinesiology

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Section: Introductionsupporting

confidence: 86%

“…Recently, new strategies for myoelectric signal processing related to the time-frequency representation (TFR) have been applied, revealing valuable information and important interpretations concerning the motor units (MU) recruitment (Von Tscharner and Goepfert, 2003;Wakeling et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Differences in time–frequency representation of lower limbs myoelectric activity during single and double leg landing in male athletes

Leporace

Pereira

Nadal

et al. 2011

Journal of Electromyography and Kinesiology

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“…However, these results only apply to indices of muscle fatigue which are essentially a measure of the trend of the data over time (NWINTn/time slope). The analysis of the power content in the different wavelets is particularly efficient to reveal specific fiber-type recruitment patterns during much smaller time-intervals of dynamic muscle contractions (von Tscharner and Goepfert, 2003;Wakeling et al, 2002).…”

Section: Global Vs Local Analyses Of the Emg Spectral Contentmentioning

confidence: 99%

The assessment of back muscle capacity using intermittent static contractions. Part I – Validity and reliability of electromyographic indices of fatigue

Larivière

Gagnon

Gravel

et al. 2008

Journal of Electromyography and Kinesiology

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“…Overall, amplitude variations alone are contingent upon external factors attenuating muscular action potentials amplitude. Using sEMG to map of spatio temporal activity at the spinal cord level is also interesting [69][70][71][72]. This mapping relies on published distribution of motor nerve roots and spinal muscular nuclei (myotomes) of each muscle.…”

Section: Kinesiological Emg Since the Advent Of Computermentioning

confidence: 99%

History of the Study of Skeletal Muscle Function with Emphasis on Kinesiological Electromyography

Blanc¹,

Dimanico²

2010

TOREHJ

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Study of muscles started probably when someone tried to understand how he can move from A to B and executes movements at will. Knowledge was always dependent on the technology available to conduct investigation. Religious belief had a negative impact on muscle study when interfering with dissection of human corpse. During the Italian Renaissance (end of XIV th to beginning of XVI th century), study of muscles was first descriptive, based on dissection. Artists like Leonardo da Vinci (1452-1519) and Michael Angelo (1475-1564) exaggerated the bulk of muscles. Their first concern was the influence of the volume of the superficial muscle on the surface modelling represented in their paintings and sculptures. Leonardo da Vinci multiplied the number of bundles of some muscles. Most of his representations of tendon insertions are imprecise. Leonardo da Vinci applied mechanical principles to rib, elbow kinematics and kinetics of the foot. Vesalius (1514-1574) was a medical doctor and an anatomist. His anatomical plates are remarkable because they respect most of the relationships between muscles. Then Galileo (1564-1642), Borelli (1608-1679) and Newton (1642-1727) thought that physics and mechanical laws governed motility of animal and human body alike. Incidental discovery of electro stimulation effect on muscle in Galvani's laboratory and electric current concomitant of muscles contraction by Matteucci and Du Bois Reymond were major breakthroughs. Recording of this current was the starting point for ECG, EMG and EEG. ECG entered first in the clinic. EMG and EEG waited for cathode ray oscilloscope.The Voltaic Pile and faradic current opened the door of electrical stimulation to Duchenne de Boulogne (1806-1875).Matteucci's (1811-1868) publications inspired and stimulated Du Bois Reymond. Du Bois Reymond (1818-1889) repeated and completed his experiments on frogs. He designed a very sensitive galvanometer with which he recorded his own global EMG. EMG remained a curiosity of laboratory until Erlander (1874Erlander ( -1965 and his pupil Gasser (1888Gasser ( -1963 improved the cathode ray oscilloscope for electrophysiological recordings. A combination of orthopaedic surgeons, engineers and physiologists in Berkeley (1945) systematically recorded EMG during gait of normal man. EMG biofeedback and phonomyography have also raised interest by clinicians. Their EMG signals processing in the time domain (full wave rectification miscalled integrated EMG) was later completed in the early '80s by computation of the root mean square on personal computers. Despite all factors minimizing the reliability of analysis based on amplitude of the EMG signals, these methods still represent the clinician's routine tool today. Since 1999, researchers have proven the benefits of muscular intensity analysis, time frequency analysis, mapping of spatio temporal activity. We deplore that the corresponding software is not available for clinicians. Multivariate methods of statistics allow the comparison of EMG patterns under pathological c...

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Gender dependent EMGs of runners resolved by time/frequency and principal pattern analysis

Cited by 67 publications

References 28 publications

Differences in time–frequency representation of lower limbs myoelectric activity during single and double leg landing in male athletes

Differences in time–frequency representation of lower limbs myoelectric activity during single and double leg landing in male athletes

The assessment of back muscle capacity using intermittent static contractions. Part I – Validity and reliability of electromyographic indices of fatigue

History of the Study of Skeletal Muscle Function with Emphasis on Kinesiological Electromyography

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