The CIFAL Input Device



The Solution for Subject-Response Testing in a Magnetic Environment

Testing subjects in a magnetic environment is a challenge, particularly if the test

requires manual switching and/or transmission of a signal. The device used must

be completely non-magnetic and preferably non-metallic to reduce unwanted signal noise that would need to be filtered. It must restrain the wrist to limit unwanted movement, while keeping the fingers comfortably positioned on the response switches. In short, it must be comfortable, robust and reliable.

The CIFAL Input Device is specifically designed for use in an fMRI or MEG

(magnetoencephalography) environment. It is a complete system with response cast, optical amplifiers, and interface boxes. The response cast consists of 100-percent plastic and fiber-optic parts, making it magnetically and RF inert. Five optical buttons are inside the thermoplastic cast that is secured to the forearm by a Velcro strap. A 50-foot optical cable connects the cast to amplifiers placed outside of the magnet room, keeping the testing and the signal free of any interference.

Designed and used at The CIFAL Institute, one of the nation’s premier neuroscience research facilities, the device is currently in service at the Center for Magnetic Resonance Research at the University of Minnesota, Martinos Center for Biomedical Imaging at Massachusetts General Hospital, and Mental Health Clinical Research Center at University of Iowa.

  • 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/Non-Metallic
  • No RF interference, no RF Filters needed

Addtional specifications available, please contact Michael Doty.