AcqKnowledge includes a number of powerful automated EMG analysis features, including
Derive Average Rectified EMG
Derive Average rectified EMG (ARV) is defined as a time-windowed mean of the absolute value of the signal. ARV is one of the various processing methods used to construct derived signals from raw EMG data that can be useful for further analysis.
Derive Integrated EMG
Integrated EMG (iEMG) is defined as the area under the curve of the rectified EMG signal, that is, the mathematical integral of the absolute value of the raw EMG signal. When the absolute value of the signal is taken, noise will make the mathematical integral have a constant increase. Integrated EMG can be derived online in real time or it can be obtained post-acquisition. Integrated EMG splits up the signal into fixed-width timeslices and resets the integral at the start of each timeslice. To derive iEMG, the width of this timeslice must be specified.
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This is one of many ADVANCED FEATURES for the selected Application. Scroll down for hardware options.Derive Integrated EMG continued…
The integrated rectified EMG signal will appear like a “sawtooth” style wave. In addition to the true iEMG a second waveform whose value is the maximum value of the iEMG signal in each timeslice will also be output. This Maximum iEMG is easier to interpret visually and approximates the envelope of the iEMG signal.
In addition to the true iEMG a second waveform whose value is the maximum value of the iEMG signal in each timeslice will also be output. This Maximum iEMG is easier to interpret visually and approximates the envelope of the iEMG signal.
Root Means Square EMG
Root Mean Square EMG (RMS EMG) is defined as the time windowed RMS value of the raw EMG. RMS is one of a number of methods used to produce waveforms that are more easily analyzable than the raw EMG.
EMG Frequency & Power Analysis
Several frequency domain techniques may be used for data reduction of EMG signals. The EMG Frequency & Power Analysis script extracts several measures derived from the power spectrum of an EMG signal. The EMG signal is split up into a fixed number of time periods; within each window, the power spectrum is computed using the Power Spectral Density transformation. For each time period, the following measures are extracted: Median Frequency, Mean Frequency, Peak Frequency, Mean Power, and Total Power.
Locate Muscle Activation
When performing gait analysis, exercise physiology, startle response, or other research, identification of periods where the muscle is active can allow for correlation of external factors to muscle activity. Locate Muscle Activation attempts to identify various periods of muscle activity using statistical methods. The transformation requires a raw, unfiltered surface EMG channel. It is important that the muscle being examined is relaxed for the first 0.25 seconds of the recording to provide an estimate of the ‚background noise‚ during areas of muscle relaxation. This quarter-second period is used to estimate baseline parameters that affect the entire process.
BIOPAC Research Solutions | EMG
EMG- Derive Average Rectified
EMG - Derive Integrated EMG
EMG - Derive Root Mean Square
EMG - Frequency and Power Analysis
EMG - Locate Muscle Activation
MRI - Cleaning Data - EMG example
BioNomadix Wireless EMG for Neuro-controlled Prosthetic
Horse EMG - running on treadmill & data
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MP36R System
Wired | Automated EMG Analysis
MP36R with AcqKnowledge plus lead set & cloth electrodes
MP160 System
Wired | Automated EMG Analysis
MP160 System with Active EMG electrodes
MP160 System
Wired | Automated EMG Analysis
MP160 System with EMG amplifier and disposable electrodes
MP36R System
MP160 System
MP160 System
MP160 System
Wireless | Automated EMG Analysis
MP160 System with AcqKnowledge plus BioNomadix wireless EMG amp, 30cm electrode lead and disposable cloth electrode
BioNomadix Logger
Wireless | Automated EMG Analysis
BioNomadix Logger and one transmitter for wireless EMG plus disposable cloth electrodes & 15 cm leads
MP160 System
BioNomadix Logger
MP160 System
MRI | Automated EMG Analysis
Facial EMG | MP160 with AcqKnowledge plus EMG MRI amp with EL510 disposable electrode setup; includes 100 pre-wired 3-lead Ag-AgCl radio-translucent electrodes.
MP160 System
MRI | Automated EMG Analysis
MP160 with AcqKnowledge plus EMG MRI amp with disposable radio-translucent electrodes
MP160 System
MP160 System
MP36R System
Animal | Automated EMG Analysis
MP36R with AcqKnowledge plus electrode lead adapter and three 12 mm TP unipolar needle electrodes
Stellar
Animal | Automated EMG Analysis
Schedule, Record, and Analyze Stellar Telemetry Data with AcqKnowledge
MP160 System
Animal | Automated EMG Analysis
MP160 with AcqKnowledge plus EMG amp with needle electrodes
MP36R System
Stellar
MP160 System
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