This application note is concerned with the implementation of subject electrical stimulation in the fMRI and MRI for the purposes of psychophysiological research. The setup presented physically limits the stimulation energy to be less than 300mJ under all operating conditions and restricts the electrical stimulation pulse widths to be 2ms or less. The setup only supports fully programmable, voltage-controlled, voltage stimulation.
Operation of STMEPM Configured for fMRI
EPI-Generated Artifact Stimulation
Recommendations for Electrical Stimulation in the fMRI and MRI
MP150 System – Data Acquisition System
STMEPM – Programmable Stimulation System for E-Prime – configured for fMRI
MECMRI-STMISO – MRI Cable/Filter System to STMISO Series
CBLCFMA – Current Feedback Monitor Cable (1v = 10ma)
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 […]