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EMG (Electromyogram)


The human body is an electrochemical organism, although the electrical activities of the body are relatively weak. Nevertheless, a variety of different human electrical activities can be measured through electrodes taped to the skin or scalp. In scientific sleep and dream research, the most important measurements are EEGs (electroencephalograms), which are measurements of brain wave activity, and EOGs (electrooculograms), which measure eye movements distinguishing between rapid eye movement (REM) and non-REM sleep. A third measurement usually taken along with an EEG and EOG is an EMG (electromyogram), a measure of muscle tone in the neck that is typically made through electrodes attached to the chin. The EMG helps researchers identify periods of head movement that may interfere with EEG and EOG readings, and is also a secondary indicator of REM periods (because muscular activity is at a standstill during REM sleep).

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References in periodicals archive ?
Stepwise multiple linear regression analysis was performed to determine the predictors of higher tonic EMG density.
EMG sinal is accquired using the designed EMG amplifier board (20-500Hz) and is digitized using PIC microcontroller.
There was a statistically significant difference in the percentage of normal EMG blink reflex findings between the headache group and control group (41.67% vs.
Cutting edge technology is considerably invulnerable to some of the EMG noises, but not to the motion artifact as it has frequency spectra that are affecting the low frequency part of EMG signal.
Shoaib stressed that Egypt will not be paying any amounts of money in the settlement of the arbitration filed by the EMG.
The EMG signals from upper (UT), medium (MT) and lower trapezius (LT), upper (AS_5th) and lower portion (AS_7th) of the anterior serratus, external (EO) and internal oblique (IO) were obtained using simple active differential surface electrodes composed of two parallel rectangular bars of pure silver.
EMG has a nationally respected reputation for its Court of Protection work and it's Court of Protection team has also been strengthened with two new appointments following the firm being awarded mental health and community care contracts from the Legal Aid Agency in September.
The purpose of this study was to assess the within-day reliability of scapular and shoulder muscle EMG measurements in asymptomatic individuals as the evidence surrounding this topic is very limited.
These are actually applicable for all EMG investigations and require more attention in the pediatric patients.
Previous studies using textile electrodes embedded in shorts have demonstrated close agreement with traditional surface EMG signals, and similar (or even superior) day-to-day reproducibility during relatively static tasks such as bilateral isometric knee extensions (Finni et al., 2007) and lying down, quiet standing and a half-squat hold (Tikkanen et al., 2013).
Genioglossus EMG. The EMG activity of genioglossus was recorded by inserting a concentric needle electrode (NM-131T, Nihon Kohden, Japan) into the genioglossus.
Masseter muscle activity was assessed and compared before injection of collagen (EMG.I.1.), lidocaine (EMG.II.1.), and saline (EMG.III.1.) after 7 days (EMG.I.2., EMG.