Fastrak

The FASTRAK by Polhemus is a leading-edge motion tracking system designed for applications requiring high-accuracy 3D position and orientation tracking. In neuroscience and neurophysiological research, FASTRAK is widely recognized for its precision and ease of use in localizing EEG electrode positions relative to anatomical landmarks—a critical step in source localization, co-registration with MRI, and individualized head models.

At NEUROSPEC, we highlight the FASTRAK's powerful role in EEG electrode co-registration workflows when paired with Locator, a dedicated software module from EMSE (Source Signal Imaging). This combination allows researchers to efficiently digitize and map the 3D positions of EEG sensors, fiducials (nasion, preauricular points), and even head shape contours for robust spatial accuracy.

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EEG Electrode Co-Registration with Locator (EMSE)

When conducting source localization or integrating EEG with MRI data, knowing the exact 3D locations of electrodes on the scalp is essential. The FASTRAK system, together with the Locator software module from EMSE, provides a reliable and intuitive solution for this process:

• Digitize Individual Electrode Positions: Record exact 3D coordinates of each EEG electrode using a stylus probe, ensuring accurate correspondence between sensor positions and anatomical references.
• Map Fiducials and Head Shape Points: Capture additional anatomical landmarks (nasion, inion, left/right preauricular points) and optional scalp contours to aid in co-registration with MRI or template brains.
• Instant 3D Visualization & Export: Locator enables real-time visual feedback during acquisition and supports export to major EEG analysis tools (e.g., BESA, BrainVision Analyzer, EEGLAB, FieldTrip).
• Plug-and-Play Integration: FASTRAK connects easily via USB, and its integration with Locator is seamless, with preconfigured templates for common EEG cap layouts.

This setup is ideal for labs using source localization, head model construction, or brain-computer interface research where high spatial accuracy is crucial.

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Key Features of Polhemus FASTRAK

• Real-Time 6DOF Tracking: Provides both position (XYZ) and orientation (azimuth, elevation, roll) with update rates up to 120 Hz per sensor.
• Exceptional Accuracy:
  • Positional accuracy: 0.03 in. RMS (0.76 mm)
  • Angular accuracy: 0.15° RMS
• Multi-Sensor Support: Supports up to 4 independently tracked sensors simultaneously.
• Electromagnetic Tracking: Operates without line-of-sight—track sensors even if occluded, unlike optical systems.
• Minimal Setup Time: Easy calibration and integration with a lightweight stylus sensor ideal for digitizing electrode positions.

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Included Accessories & Options

• Transmitter
• Receiver
• Stylus probe sensor (ideal for EEG digitization)
• Mounting hardware and extension cables
• USB interface converter
• Optional head fixation mounts
• Locator Software (EMSE) – available separately from NEUROSPEC

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Why Choose FASTRAK + Locator for EEG Research?

✓ Rapid, high-accuracy EEG electrode digitization
✓ Trusted by EEG labs worldwide for MRI co-registration
✓ Compatible with major EEG analysis software
✓ No camera setup or line-of-sight issues
✓ Full support and training available through NEUROSPEC