BIOPAC offers a variety of setups for recording electrodermal activity, including
Reusable: skin conductance transducer (MP150+TSD203 or MP36+SS3LA) and electrodermal gel (GEL101).
Disposable: MP150+EDA100C amp with 2 x LEAD110A or MP36+SS57LA EDA lead let plus pre-gelled EDA electrodes (EL507).
Wireless or Logged: BN-PPGED amplifier or BN-LOGGER+BN-PPGED-T transmitter plus BN-EDA-LEAD2 and pre-gelled EDA electrodes EL507.
MRI: EDA100C-MRI amplifier with MR-conditional leads (2 x LEAD108B 15 cm or LEAD108C 30 cm), radio-translucent electrodes (2 x EL509 dry electrodes), and electrodermal gel (GEL101).
The following general guidelines will improve the quality of data from any setup:
Never abrade the skin.
Note: For MRI setups, lightly abrading the skin may sometimes help if the subject has particularly calloused fingers. Still, this is not recommended and should be used as a last resort only. See MRI Guidelines for additional information.
If you clean the electrode site, do it with water for all subjects.
Make sure you have enough gel on the electrodes. (Dry disposable electrodes will result in a deteriorated signal. Follow the storage guidelines for the electrodes to prevent them from drying out)
Use isotonic gel. (If using disposable electrodes and they appear dry you can still use them by applying isotonic gel as long as the dry gel on the electrodes has not crystallized)
Attach the electrodes 5-10 minutes before recording.
To confirm whether they are making good contact ask the subject to take a deep breath and hold it for a few seconds. This will usually result in a skin conductance response (see Deep breath and SCR/EDA (GSR) increase).
The STMEPM Programmable Stimulation System for E-Prime allows a user to interface the STMISOLA Stimulator with E-Prime to control the stimulus frequency and stimulus intensity for real-time stimulus delivery changes based on a subject’s responses. It is also possible to hardcode the stimulus intensity levels in the presentation so that predefined stimulus levels are delivered […]
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 […]