Here are some suggestions for overcoming the problem of stimulation artifact when applying a stimulation voltage to a muscle.
Have the ground between the stimulating electrodes and the recording electrodes.
The recording electrodes should be placed orthogonal to the stimulating electrodes.
Apply the highest possible low pass filter on the amplifier. This will allow the amplifier to recover faster.
During analysis, the find peak function should be used to look for EMG activity between the electrical stimuli. For example, if the stimuli are 100 msec apart and it takes 10 msec for the amplifier to recover from the stimulus a find peak from 10 to 99 msec after the interval can be used.
The stimulus artifact may never be removed completely because it is so intense. But this will not be much of an issue since the EMG signal you need for analysis falls between the spikes in the signal caused by the stimulator.
Register Today! T4: Tools, Trends, Techniques, and Technology Monday, July 24, 2017 – Wednesday, July 26, 2017 Join BIOPAC for three days of hands-on, small-group human physiology workshops, presented by renowned experts, on the beautiful University of California at Santa Barbara campus in Santa Barbara, California, USA. Who should attend Anyone who records and analyzes […]
The Mobita 32-Channel EEG recording system was used in research examining if physiological data can be used to predict truly random events that correspond to perceptual stimuli. Baumgart, et al. from the University of California Santa Barbara utilized a quantum random number generator (qRNG) to choose from three randomized conditions: light, sound, and no stimulus. […]
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 in monitoring respiration and cardiovascular activity. The coupling between peripheral microcirculation and slow breathing: The purpose of this study was to investigate the coupling of breathing movements and microcirculatory blood […]