BIOPAC® Systems, Inc. Logo

Electrical stimulation and artifact

Here are some suggestions for overcoming the problem of stimulation artifact when applying a stimulation voltage to a muscle.
 
  1. Have the ground between the stimulating electrodes and the recording electrodes.
  2. The recording electrodes should be placed orthogonal to the stimulating electrodes.
  3. Apply the highest possible low pass filter on the amplifier. This will allow the amplifier to recover faster.
  4. 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.

Associated Applications

Associated Disciplines

Spotlight On
Smart Center controller, 2-3 wireless transmitters & AcqKnowledge plus case

Smart Center | Stand-alone BioNomadix Wireless Systems

Smart Center Stand-alone, Portable Wireless Physiology Systems Smart Center Essentials entry-level system includes a Smart Center Device (BN-SMART with USB power cable), 2 or 3 Transmitters (BN-xxx-T with chargers); AcqKnowledge for Smart Center, and a case. Smart Center Enhanced adds a Logger (BN-LOGGER) and Basic Scripting License (ACK100W-BAS) to the Smart Center Device (BN-SMART with powercable), 3 […]

View All
Latest News

Alan Macy Honored as Local Hero

“Alan Macy: Scientist, Entrepreneur, and Visionary Community Builder” The Santa Barbara Independent honored Alan Macy as a Local Hero. “What makes Macy a Santa Barbara Independent Local Hero is the combination of vision, generosity, and persistence he has shown in bringing creative people together and in crafting innovative venues for them to collaborate. …For this, and for his […]

BIOPAC Releases New BioNomadix Smart Center System

Good quality data is important for reliable physiological research. No longer restrained to wires or stationary devices, BIOPAC’s newly released Smart Center is a lightweight and compact system designed to acquire quality data. The portable, wireless device offers high fidelity physiological data, allowing for subjects to be untethered while being recorded. The system includes the […]

Read All
Request a Demonstration
Request a Demonstration