Equipment for stimulation of subjects

Visual stimulation.

• For  visual stimulation, we use  a   FL35 LED  DLP projector from Projection Design.  The current installation runs at 32 bit color in 1920*1080  @  120 fps..  Maximum  field of view for visual presentation is about  63 (horizontal) * 41 (vertical) degrees.
• The visual stimulation is typically controlled via Neurobs Presentation, in which case  the computer-to-eye delay is about 8 ms, with no frame drops or frame doubles.

Further technical specifications for the projector are found here.

Auditory stimulation.

• For audio stimulation, we use  either headphones or speakers.
• The headphones are binaural SoundTubes, model ADU1c, from KAR Audio.

Further technical specifications are found here.

The stimulator-to-ear delay is about 10 msec .

• The  speakers are  Sound Showers, model SSHP60X60W, from PanPhonics.

Further technical specifications are found here. 

The stimulator-to-ear delay is about 10 msec .

The audio stimulation is typically controlled via the AudioFile stimulator from Cambridge Research Systems Limited, in which case  the sound onset jitter is below 1 ms.

Further technical specifications for the AudioFile are found here.

Electrical nerve stimulation.

• For  electrical nerve stimulation, we use two DeMeTec SCG30 stimulators, either with felt tips for median nerve stimulation, or with ring electrodes for single phalange stimulation.

The trigger to stimulation delay is about 3 msec .

Further technical specifications are found here.

Olfactory stimulation.

• For  olfactory stimulation, we use a  Monell 9-channel olfactometer.

The trigger to stimulation delay is under evaluation.

Further technical specifications  TBA.

Tactile stimulation.

• For tactile  fingertip, toe and lip stimulation, we use a 4-channel Somatosensory Stimulus System from Biomagnetic Technologies.

The trigger to stimulation delay is under evaluation.

Further technical specifications are found here.

Proprioceptive stimulation

• For proprioceptive  and/or tactile finger stimulation, we use a 5-channel custom-built PAM system from NatMEG Guest Professor Veikko Jousmäki.

The trigger to stimulation delay is under evaluation.

Further technical specifications  TBA.

Pleasant touch stimulation. ...

• For pleasant touch stimulation, we use  custom-built 2-arm brush robot system from NatMEG Guest Professor Veikko Jousmäki.

The trigger to stimulation delay is completely dependent on brush robot sequences. A combination of brush arm speedometer, accelerometer, load cell and brush touch onset optic sensors are used to assess the movements and stimulation periods.

Further technical specifications  TBA.

Mechanical pain stimulation

• For mechanical pain stimulation, we use a custom-built pressure algometer from Somedic.

The trigger to stimulation delay is under evaluation.

Further technical specifications  are found here.