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Compact, 2-axis Fiber Optic Joystick for computer research tasks in fMRI and MEG

Smaller, lighter joystick alternative

Ballistic and fine finger movements

All plastic construction


This recent addition to our product line combines a compact, 2-axis joystick with a high quality return-to-zero mechanism. Ballistic and fine finger movements can be recorded accurately with low force requirements and high responsiveness. The short shaft can be controlled well with a fingertip or thumb alone with very little or no movement of the wrist and arm. We developed this in response to customer requests for an smaller, lighter alternative to the Tethyx joystick (which is still often the better choice for VR navigation tasks, especially those requiring thumb or finger button activations) for motor neurophysiology tasks. It is compact enough to be held in one hand for thumb use, rested on the leg, or positioned next to the leg. Threaded holes on the underside can be used for mounting to a fixture (and have been used to hold a pair of these for bimanual use.) Coming soon: A less expensive, non-MR trainer for this response pad for use outside the magnet room.


  • Handheld for the 932 and 904 interfaces
  • 2.6" (66 mm) outer diameter base
  • 0.27" (6.9 mm) shaft diameter
  • 2.1" (53 mm) overall height
  • +/- 20 degree motion in two axes
  • Available with circular, square, or linear range limits
  • 10 ft (3 m) long fiber pigtailed connector
  • Automatic optical identification by 900 series interface units
  • Contains no metal, nothing magnetic, and no electronics: 100% MR compatible

What Else Is Needed

This handheld response device needs an electronic interface to function -- that converts the optical signals to standard computer interfacing signals. In most cases you will also need a long optical fiber extension bundle to allow this device to be used at a distance from the interface unit. Examples of the interface and bundle are shown below in the Related Products section.

magnet safe This item contains no metal, nothing electronic, and nothing magnetic. It can be used safely in the magnet room.
More Information
Price $2,500.00
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