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.
BIOPAC is introducing Biopac Student Lab Home (BSL HOME)—a new product specifically geared towards teaching physiology labs remotely so students can still get hands-on, practical lab experience if social distancing and stay-at-home orders keep them out of the lab..
BSL HOME will allow your students to conduct physiology labs in the safety of their own home, dorm room, or any remote location.
BIOPAC’s ventilator testing equipment and expertise supports STARK Industries’ effort to manufacture, validate, and test NASA JPL’s VITAL Ventilators Goleta, California – June 16, 2020 BIOPAC Systems, Inc. announced a partnership with STARK Industries, LLC to provide ventilator validation and testing equipment for the mass production of ventilators. STARK Industries was awarded a global license […]
Comparing Muscle Movement and Involvement between Boxing Punches In the fast-paced, high-intensity combat sport of boxing, the right punch can win a fight. However, boxing is also a sport where opponents can become exhausted in mere minutes of action, and prioritizing their strength is key to winning a fight. This team recorded EMG on test […]