Recommendations for the standardization of lead positions in surface electromyography

Zipp, Peter

doi:10.1007/bf00952243

Cited by 407 publications

(215 citation statements)

References 5 publications

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“…After appropriate preparation of the skin, the surface EMGs of the flexor digitorum superficialis (FDS) and the extensor digitorum (ED) muscles were recorded by means of surface electrodes (Blue Sensor ® , Medicotest, Denmark) placed on the forearm about one quarter of the elbow-wrist distance from the elbow (Zipp, 1982). The distance separating the centre of the electrodes was 2 cm.…”

Section: Methodsmentioning

confidence: 99%

Relevance of the EMG/Grip Relationship in Isometric Anisotonic Conditions

Claudon

2003

International Journal of Occupational Safety and Ergonomics

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The aim of the present study was to develop a relationship to evaluate grip force using the electromyogram (EMG) in isometric anisotonic conditions.The EMGs of the flexor digitorum superficialis (FDS) and the extensor digitorum (ED) were recorded in 3 flexion-extension positions of the wrist (30° flexion, 30° extension, and 60° extension) associated with 3 positions of the forearm (70° pronation, prono-supination, and 70° supination). For each position, the participants had to follow linear ramp targets (2 rates of increase and decrease) displayed on an oscilloscope.The results show the best fit is a quadratic type force-EMG relationship. Some aspects such as the rate of force variation and the forearm and wrist positions are then discussed along with the limitations of the relationship. cumulative trauma disorders upper limb electromyogram force isometric contraction anisotonic contraction

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Section: Methodsmentioning

confidence: 99%

Relevance of the EMG/Grip Relationship in Isometric Anisotonic Conditions

Claudon

2003

International Journal of Occupational Safety and Ergonomics

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“…The electrodes were placed over the erector spinae muscle parallel to the orientation of the muscle fibers. The electrode sites and the distance of the electrodes were carefully determined for each subject according to Zipp [25]. We collected sEMG data using differential (interelectrode distance of 20 mm with 8 mm diameter), preamplified (gain of 35), silver-silver chloride sEMGs (Therapeutics Unlimited, Inc; Iowa City, Iowa) during the approximately 1-minute testing period.…”

Section: Electromyographic Recordingmentioning

confidence: 99%

Comparison of spectral and entropic measures for surface electromyography time series: A pilot study

Sung¹,

Zürcher²,

Kaufman³

2007

JRRD

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Abstract-In a previous study, we reported that the mean square displacement calculated from the surface electromyography (sEMG) signal of low back muscles exhibits a plateaulike behavior for intermediate times 20 ms < t < 400 ms. This property indicates the existence of correlations in the signal for times much longer than the inverse of the median frequency (MF), which is calculated from the power spectrum 1/ = 1/(100 Hz) = 10 ms, where is the MF. This result suggests the use of methods from nonlinear analysis to characterize sEMG time series. In this study, we applied these techniques to sEMG signals and calculated the time-dependent entropy. The results showed that the entropy of physiological time series from nondisabled control subjects is higher than the entropy from subjects with low back pain (LBP). The entropy reveals properties of the sEMG signal that are not captured by the power spectrum. In turn, this suggests a possible benefit of entropy as a tool for the clinical assessment of LBP. Because the two groups of subjects were not matched by age, the physiological origin of the observed differences between groups could be attributed to either LBP, age, or both. Additional studies with larger sample sizes and age-matched subjects are needed to investigate the relationship between LBP and entropy.

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“…Bipolar, silver-silver chloride surface electrodes with an interelectrode distance of 20 millimeters and preamplified with a gain of 30 were used for all of the recordings. Standard placement procedures were used to position the electrodes over the three muscle groups (31).…”

Section: Source Electromyographic Datamentioning

confidence: 99%