Multi-channel EMG of the M. triceps brachii in rats during treadmill locomotion

Schumann, N. P.; Biedermann, Frank; Kleine, Bert U.; Stegeman, Dick F.; Roeleveld, Karin; Hackert, Rémi; Scholle, Hans‐Christoph

doi:10.1016/s1388-2457(02)00143-8

Cited by 32 publications

(20 citation statements)

References 16 publications

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“…First, the pick up area of the unipolar SEMG is much larger than the one of bipolar SEMG (Roeleveld et al 1997;Schumann et al 2002). In other words, bipolar SEMG reflects mainly information about the most superficial part of the muscle, while unipolar SEMG provides information about a larger area of the muscle and possibly from all muscles of the lower leg.…”

Section: Activity Of Agonistmentioning

confidence: 98%

Changes in agonist EMG activation level during MVC cannot explain early strength improvement

et al. 2005

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A substantial gain in strength is often observed in the early phase of resistance training. The aim of this study was to address whether improved strength in the early phase of resistance training, can be attributed to increased activation, or to intra-muscular changes of the agonist muscle during maximal isometric torque production. Fourteen male subjects trained maximal isometric dorsiflexion during 5 days. Each subject performed 9 sessions with 25 maximal voluntary contractions in a device that registered the dorsiflexion torque. Surface electromyography (SEMG) of the tibialis anterior (TA) was recorded with a 130-channel grid electrode. SEMG of the extensor digitorum longus, gastrocnemius and soleus muscles were recorded with bipolar electrodes. The main finding was that all subjects gained in strength while the SEMG activation level of the primer agonist, TA, decreased with no apparent intra-muscular spatial changes following 5 days of resistance training. The other muscles that influence dorsiflexion torque did not modify their activation level with training. These findings reject an increase in agonist activation level as the main source for early strength gain, and illustrate the need for further research to reveal the specific sites of neural adaptation and other physiological mechanisms that might contribute to increased strength during the early phase of resistance training.

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Section: Activity Of Agonistmentioning

confidence: 98%

Changes in agonist EMG activation level during MVC cannot explain early strength improvement

et al. 2005

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“…Starting with Eadweard Muybridge and Etienne-Jules Marey (1830-1904) the main topic of investigation in movement examinations has been the analysis and modeling of human gait [1,9,33,41,48]. Functional parameters of muscles in human [10,19,44] as well as in animal gait [3,4,11,15,43] are analyzed to develop models of how walking is organized in general [5,35].…”

Section: Introductionmentioning

confidence: 99%

Trunk muscle activation patterns during walking at different speeds

Anders

Wagner

Puta

et al. 2007

Journal of Electromyography and Kinesiology

128

116

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“…Recently, different techniques based on multi-channel sEMG (MCSEMG) were presented and used for this purpose (e.g. [20,5,8]). An advantage of MCSEMG, compared to other methods to investigate MU recruitment, besides its non-invasiveness, is that it is not constrained to analyze recruitment of only a few MUs, but can investigate MU recruitment in a large spatial area of a muscle.…”

Section: Introductionmentioning

confidence: 99%

“…Studies applying MCSEMG to examine spatial intramuscular activation have applied three main techniques to describe this phenomenon: (1) by reporting the change in the root mean square (RMS) distribution over the muscle by topographical visualization, called mapping [19,20], (2) by illustrating mapping of MU action potentials with triggered averaging [12], (3) by calculating and displaying the cross-correlation of each individual channel related to a selected reference channel [6,18].…”

Section: Introductionmentioning

confidence: 99%