Telemetric Lower Limb EMG Analysis

During the balancing trials, EMG data were collected telemetrically. The skin was carefully prepared by shaving and cleaning with alcohol. Dual Ag/AgCl surface electrodes (Noraxon, Scottsdale, United States of America) were positioned on eight lower extremity muscles, namely tibialis anterior (TA), peroneus longus (PL), soleus (SOL), gastrocnemius medialis (GastM), biceps femoris (BF), vastus lateralis (VL), vastus medialis (VM), and gluteus medius (GM). EMG electrode positioning on the muscles was carried out by the SENIAM recommendations (www.seniam.org). The input impedance for our EMG amplifyer was >100 Mohm. The common-mode rejection radio was >100 dB. Interelectrode distance was 20 mm. Electrodes were kept in their place throughout the balance tests. EMG signals were collected (Noraxon, Scottsdale, United States of America, sampling frequency: 2000 Hz), band pass filtered (20–500 Hz), and processed with the root mean square (RMS) technique, using 50-m moving window. For each muscle, the mean RMS EMG activity was thereafter calculated considering the entire 10-s-long trial.

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Mayer P., Sebesi B., Vadász K., Laczkó J., Zentai N., Balázs B, & Váczi M. (2023). Kinematics and muscle activity of the lower limb during single-leg stance on the two sides of the Togu Jumper. Frontiers in Physiology, 14, 1049035.

Publication 2023

Dual Ag/AgCl surface electrodes

Alcohol Band Biceps femoris Gastrocnemius Gluteus Lower extremity Muscle Root Skin Soleus Tibialis anterior Vastus lateralis Vastus medialis

Corresponding Organization : University of Pecs

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Variable analysis

independent variables

None explicitly mentioned

dependent variables

EMG data from eight lower extremity muscles: tibialis anterior (TA), peroneus longus (PL), soleus (SOL), gastrocnemius medialis (GastM), biceps femoris (BF), vastus lateralis (VL), vastus medialis (VM), and gluteus medius (GM)

control variables

Skin preparation: shaving and cleaning with alcohol
Electrode type: Dual Ag/AgCl surface electrodes (Noraxon, Scottsdale, United States of America)
Electrode positioning: According to SENIAM recommendations
Input impedance of EMG amplifier: >100 Mohm
Common-mode rejection ratio: >100 dB
Interelectrode distance: 20 mm
EMG signal processing: Band-pass filtered (20-500 Hz), root mean square (RMS) technique with 50-ms moving window
EMG data collection duration: Entire 10-s-long trial

controls

No positive or negative controls were explicitly mentioned in the provided information.

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