Análise da relação entre parâmetros da onda M e a dor

Machado, Alessandro Ribeiro de Pádua; Oliveira, Iraides Moraes; Alves, Adriano Pereira; Andrade, Adriano de Oliveira

doi:10.1590/s1806-00132011000400004

Cited by 1 publication

(2 citation statements)

References 38 publications

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“…In addition to the NFR, different studies utilized other methods, such as the M wave, algometry, pain scales and questionnaires, hypertonic saline solution, electroencephalography, thermosensitivity, functional magnetic resonance imaging, and lasers (Bottega & Fontana, 2010; Buchgreitz, Egsgaard, Jensen, Arendt-Nielsen, & Bendtsen, 2008; Ervilha, Farina, Arendt-Nielsen, & Graven-Nielsen, 2005; Graven-Nielsen, Arendt-Nielsen, & Mense, 2002; Hogeweg, Langereis, Bernards, Faber, & Helders, 1992; Iannetti, Hughes, Lee, & Mouraux, 2008; Iannilli, Gratta, Gerber, Romani, & Hummel, 2009; Kane et al, 2005; Machado et al, 2011; Ong & Seymour, 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Several studies reported the importance of identifying pain intensity, but most of them used subjective methods for such measurements (Ahlers et al, 2008; Lee, 2001; Machado, Oliveira, Alves, & Andrade, 2011). Thus, according to Chan and Dallaire (1989), validating the measurement of pain using psychophysical and physiological instruments simultaneously is desirable, such as the nociceptive flexion reflex (NFR) evoked from electrical stimulation that has been proposed as a physiological nociceptive indicator (Chan & Dallaire, 1989; Rhudy & France, 2007; Willer, 1977).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Estimated features from surface EMG of the lower limb correlate with the subjective sensation of pain.

Oliveira

Machado

Pereira

et al. 2014

Psychology & Neuroscience

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Pain assessment is very important in establishing the efficacy of analgesics and therapies, but because pain is a subjective experience, using methods that represent pain objectively is necessary. A number of biopotentials have been employed in studies of the objective assessment of pain. However, few investigations have considered the peripheral nervous system response to electrical stimulation. The present study evaluated a method for pain quantification based on the analysis of biopotentials. We assessed electromyographic activity that resulted from evoked movements from the nociceptive flexion reflex (NFR). We investigated correlations between stimulus intensity, features extracted from surface electromyography (EMG), and subjective pain reported by subjects using a Visual Analog Scale (VAS). A total of 10 healthy male subjects without any pain disorder, aged 20-27 years, participated in the study. A high correlation (r 2 > .87) was found between stimulus intensity and the following features extracted from the EMG: area, root mean square (RMS), and entropy. A high correlation (r 2 > .99) was also found between stimulus intensity and subjective pain reported on the VAS. We conclude that estimating features from electromyographic signals that are correlated with subjective pain sensations and the intensity of the electrical stimulus is possible. Entropy, RMS, and the area of the electromyographic signal appear to be relevant parameters in correlations with subjective pain.

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