All biopotential recordings can suffer from 50/60Hz interference. The largest contributors to problems are mains ground wiring and florescent fixtures.
For lighting we would recommend incandescent fixtures, perhaps low voltage (non-switching) halogen. For a very low power alternative, LED lighting would be an excellent choice, so long as AC/DC conversion elements are not introduced into the environment of the room. Its best to keep all switching elements associated with lighting out of the room. Fluorescents are not recommended due to high frequency EMI.
The electrical mains grounding should be as good as possible. This would imply using low gauge wiring (beefy wire) on all outlet ground connections and run each outlet solidly to mains ground at the sub-distribution panel.
It would be best not to daisy chain the electrical outlets in the room. It would be best if each outlet had a line which ran back directly to the sub panel breaker, In this manner the sub-panel would act as the common distribution point for all power issued to the room.
This electrical design is very helpful when the room is used in practice. For example, if some equipment is brought into the room which generates mains conducted EMI, this potential EMI will be very well isolated from other room outlets.
Electrodermal Activity (EDA) is an objective index for understanding emotional states. Researchers measure EDA to gain insights on psychological or physiological response, leading them down the path of scientific discovery. Because EDA is so important to research, BIOPAC has created tools to optimize event-related EDA analysis. Topics include: how to identify skin conductance responses, convert stim events from E-Prime SuperLab, Presentation, Vizard, etc., into AcqKnowledge events that can used for analysis, and score skin conductance responses using the AcqKnowledge automated EDA analysis tool.
NIRS and CNAP—Pairing great tools for great data Cerebral hemoglobin concentration (blood mass in the brain) is frequently measured in the prefrontal cortex, and systemic arterial blood pressure is known to be a variable factor based on the hemoglobin concentration. A leg pressure cuff was used to constrict and release blood flow to create a […]
BIOPAC’s just released Introductory ECG Guide addresses fundamental to advanced concerns to optimize electrocardiography data recording and analysis. Topics include: ECG Complex; Electrical and Mechanical Sequence of a Heartbeat; Systole and Diastole; Configurations for Lead I, Lead II, Lead III, 6-lead ECG, 12-lead ECG, precordial leads; Ventricular Late Potentials (VLPs); ECG Measurement Tools; Automated Analysis Routines […]