g.STIMbox: Specs & Features

Receive digital trigger input information and send stimulation patterns to external stimulators.

The g.STIMbox is used to generate and record trigger signals. Arbitrary paradigms can be programmed easily using the 16 digital outputs and are executed with high temporal precision. At the same time, trigger signals from external devices can be recorded using the 14 digital inputs of the device.

Therefore the g.STIMbox is an ideal extension for electrophysiological research systems which require additional digital input and output possibilities. The device provides versatile cinch connectors for 8 of the 16 outputs which can be used very conveniently, e.g. with LED's for visual stimulation, to connect electrical stimulators or other devices triggered by 5V pulses. Compact devices like the g.SSVEPbox, which require several output/input channels, are connected using the SUB-D ports of the device.

The 14 digital inputs can be used to record signals from external devices. Here, again, 8 of the 14 digital inputs are implemented as cinch connectors. The g.STIMbox is connected to the recording computer via USB, offers synchronous and asynchronous operation modes, and comes with a C-Application Programming Interface (API), a MATLAB-API and a Simulink-block.

Highly accurate stimulation frequencies can be defined and are calculated on the g.STIMbox (e.g. 10 Hz for SSVEP stimulation). Therefore a highly precise SSVEP stimulation as used for BCI experiments can be realized.

For power supply you can use USB or an external power supply unit. 

Product Highlights

  • µC controlled inputs and outputs for accurate timing
  • Digital outputs can produce precisely-timed paradigms
  • Digital inputs can be acquired and used within the recording system
  • Direct control of inputs/outputs from a computer via USB
  • 14 digital inputs (TTL) and 16 digital outputs (TTL)
  • Digital outputs usable for tactile or visual stimulation
  • C API, MATLAB API and Simulink drivers

g.SSVEPbox and external I/O devices

The g.SSVEPbox is a stimulation device for Steady-State Visual Evoked Potentials. It can be connected to the g.STIMbox digital outputs. Four ultra-bright, dimmable LEDs provide precise stimulation and four smaller LEDs indicate which LED is the target LED. The flickering frequencies can be freely configured via software (e.g. with the g.STIMbox MATLAB API). 

If the g.SSVEPbox is used for BCI experiments, then a paradigm can be realized in Simulink that indicates the target LED in training mode. In real-time control mode, the user can choose the target LED and thus communicate freely. This setup allows many applications, such as moving a robotic device forward, backward, left and right.

For the g.STIMbox, small and hand able input/output devices are available, which are connected to single cinch-connectors and provide basic functionality. The pushbuttons, which are connected to input channels, are used for example to feed back responses of test subjects into the recording system. The single LED boxes, which are connected to output channels, can be used for visual stimulation.

g.VIBROstim

g.VIBROstim is a compact vibro-tactile stimulator unit to be connected to the output of g.STIMbox. It can be attached to the body (e.g. upper/lower limbs, torso) with Velctro straps or adhesive tape. The intended use is to provide tactile stimulation - for short term applications in research - to the skin.


Available configurations

Hardware and Accessories

product no.: 1302 read more g.STIMbox: Specs & Features — stimulation box to record and generate trigger signals; 16 digital outputs and 14 digital inputs; C API, MATLAB API and Simulink driver
product no.: 1300 read more g.SSVEPbox — SSVEP stimulation box with 4 stimulation- and 4 training-LEDs, adjustable intensity

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read more g.Nautilus: Specs & Features — wireless EEG system with active electrodes
product no.: 1305 read more g.VIBROstim — stimulator for vibro-tactile evoked potential experiments; prerequisite g.STIMbox (1302)
product no.: 1307 read more push button, for g.STIMbox — bounce free, to record subject responses, 1,8m cable; prerequisite g.STIMbox (1302)
product no.: 1309 read more single flashing LED, for g.STIMbox — single fashing LED for SSVEP experiments; prerequisite g.STIMbox (1302)

Related Media and Documents

Videos

download
video/mpeg
BCI - Robot control with steady-state visual evoked potentials (SSVEP) — 11/04/2010 — 12.28 MB

Tutorials

download
application/pdf
SSVEP BCI — 07/27/2012 — 1.20 MB