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Titolo:
Optimal signal bandwidth for the recording of surface EMG activity of facial, jaw, oral, and neck muscles
Autore:
Van Boxtel, A;
Indirizzi:
Tilburg Univ, Dept Psychol, NL-5000 LE Tilburg, Netherlands Tilburg Univ Tilburg Netherlands NL-5000 LE 5000 LE Tilburg, Netherlands
Titolo Testata:
PSYCHOPHYSIOLOGY
fascicolo: 1, volume: 38, anno: 2001,
pagine: 22 - 34
SICI:
0048-5772(200101)38:1<22:OSBFTR>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAXIMAL VOLUNTARY CONTRACTION; POWER SPECTRUM; CONDUCTION-VELOCITY; MYOELECTRIC SIGNAL; MEDIAN FREQUENCY; ANKLE MUSCLES; FIRING RATE; ELECTROMYOGRAM; AMPLITUDE; TASK;
Keywords:
facial EMG; motion artifacts; EMG bandwidth; EMG power spectrum;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Van Boxtel, A Tilburg Univ, Dept Psychol, POB 90153, NL-5000 LE Tilburg, Netherlands Tilburg Univ POB 90153 Tilburg Netherlands NL-5000 LE lands
Citazione:
A. Van Boxtel, "Optimal signal bandwidth for the recording of surface EMG activity of facial, jaw, oral, and neck muscles", PSYCHOPHYSL, 38(1), 2001, pp. 22-34

Abstract

Spontaneous pericranial electromyographic (EMG) activity is generally small and is contaminated by strong low-frequency artifacts, High-pass filtering should suppress artifacts but affect EMG signal power only minimally. In 24 subjects who performed a warned simple reaction time task, the optimal high-pass cut-off frequency was examined For nine different pericranial muscles. From four experimental conditions (visual and auditory reaction signals combined with hand and foot responses), 1-min EMG recordings were selected (bandwidth: 0.4-512 Hz) and divided into 60 1-s data segments. These segments were high-pass filtered, the -3-dB cut-off frequency varying from 5 to90 Hz, and subjected to power spectral analysis. Optimal high-pass filter frequencies were determined for the mean power spectra based an visual estimation or comparison with a theoretical spectrum of the artifact-free EMG signal. The optimal frequencies for the different muscles varied between 15 and 25 Hz and were not influenced by stimulus or response modality. For allmuscles, a low-pass filter frequency between 400 and 500 Hz was appropriate.

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Documento generato il 30/03/20 alle ore 13:03:45