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 300 mJ under all operating conditions and restricts the electrical stimulation pulse widths to be 2 ms 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
MP160 System Data Acquisition System (includes HLT100C or AMI100D High-level Transducer Module) OR MP150 System Data Acquisition System (includes UIM100C Universal Interface Module)
STMEPM-MRI Programmable Stimulation System for E-Prime – consolidated equipment, configured for fMRI
STM100C Stimulator Amplifier Module
STMISOC Stimulus Isolator
IPS100D Isolated Power Supply Module
MECMRI-STMISO MRI Cable/Filter System to STMISO Series
Interface Cables: CBLEPM for E-Prime; CBL100 3.5 mm, CBL122 RJ
E-Prime to analog out of IPS100D via CBL122+CBL100+CBLEPM
CBLCFMA Current Feedback Monitor Cable (1 V = 10 ma)
Note If other modules will be connected between MP150 System and subject, the CBLFMA output will need to run through an INISO Input Signal Isolator and HLT100C/AMI100D High-level Transducer Module (instead of through the UIM100C). The MP160 System includes the HLT100C/AMI100D High-level Transducer Module in lieu of UIM100C.
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