The best solution is to avoid the ECG artifact in the first place. The problem is typically solved by adjusting the placement of the electrodes. Place the EMG electrodes so that they are NOT aligned with the axis of electrical activity of the heart. Placing both EMG electrodes (Vin+ and Vin- ) on the same side of the body will help.
ECG artifact can be removed from EMG data that has been recorded by applying a 50Hz High pass FIR filter. The number of coefficients should be greater than or equal to two times the sampling rate, divided by the lowest cutoff frequency specified. For example, if running a low pass filter at 1Hz on data sampled at 100Hz, choose at least (2 X 100/1) or 200 coefficients in the filter. Additional coefficients will improve the response. Use a number four times higher.
New series of unshielded 45 cm electrode leads with thin cable; suitable for facial EMG and other areas where lighter, shorter lead cables are required. Use for female Touchproof connectors to pinch clip connectors—connect electrodes to either a C-series amplifier or an MEC. The pinch connectors are light weight and the lead cable tinsel wire […]
The new issue of Psychophysiology has a study “Quantifying rapid changes in cardiovascular state with a moving ensemble average” using MEAP for preprocessing/analysis and BIOPAC hardware and software for data collection, display, and storage. The proof of concept study demonstrates a viable method for the adoption of ICG measures across the field of psychophysiology. MEAP (moving ensemble […]
BIOPAC provides software and hardware that allow for research teams to record and analyze respiration activity in physiological experimentation. Here are a few notable studies covering MRI, ECG, and Laser Doppler Flow measurement. fMRI & Thermal Perception: The neural mechanisms underlying thermal perception (how hot or cold we perceive the temperature to be) have not been fully […]