Mind Input Device //
Testing subjects in a magnetic environment is a challenge, particularly if the test requires manual switching and/or signal transmission. Subject-response devices must be non-magnetic and preferably non-metallic to reduce unwanted signal noise that would need to be filtered. In addition, these devices must restrain the wrist to limit unwanted movement, while keeping the fingers comfortably positioned on the response switches.
All MRN imaging modalities are outfitted with a fiber-optic subject-response device, developed and patented at MRN. This device is specifically designed for use in an fMRI or MEG environment, and is a complete system – with response cast, optical amplifiers, and interface boxes. The thermoplastic response cast, which is secured to the forearm by a Velcro strap, consists of 100-percent plastic and fiber-optic parts, making it magnetically and RF inert. Five optical buttons are contained inside the cast. A 50-foot optical cable connects the cast to amplifiers placed outside the magnet room, keeping the testing and the signal free of any interference.
Here are some features of MRN’s Mind Input Device:
- LEDs provide instant visual feedback to the experimenter to ensure that the subject is responding correctly;
- compatible with E-Prime, MEL Professional NBS Presentation and other leading stimulus-delivery software packages;
- compatible with external data-acquisition systems like PowerLab, BioPac, LabVIEW, etc.;
- MRI-compatible/MRI-safe for fMRI and MEG applications;
- non-magnetic and non-metallic; and
- no RF interference, so no RF Filters needed.
The Mind Input Device is currently also in service at the Center for Magnetic Resonance Research at the University of Minnesota, the Martinos Center for Biomedical Imaging at Massachusetts General Hospital, the Mental Health Clinical Research Center at University of Iowa, and the VA San Diego Medical Center.
For additional information and specifications, please contact Michelle Gallegos.