New tested solution for EEG-fNIRS: Brain Products’ LiveAmp with Cortivision’s cutting edge system Spectrum C23

by Paulo Rodrigo Bazán, Ph.D.
Scientific Consultant (Brain Products)

Emblem EEG-fNIRSUsing EEG in multimodal applications is a great way to expand the potential of EEG research. One such example is combined EEG-fNIRS experiments, which provide the benefits of the temporal resolution of the EEG electrical response and the spatial resolution of the functional Near-Infrared Spectroscopy (fNIRS), based on hemodynamic response.

In 2024, we started a series of support articles demonstrating how to combine Brain Products electroencephalography (EEG) solutions with functional Near-Infrared Spectroscopy (fNIRS) solutions from various manufacturers (e.g., Cortivision, NIRx, Artinis).

Based on our recent multimodal EEG-fNIRS LIVE demonstration at OHBM 2025 in Brisbane (Australia), we are very pleased to add another EEG-fNIRS combination to our list of tested solutions:

LiveAmpwith Spectrum C23from Cortivision

The full list of tested EEG-fNIRS solutions and additional information are available in the EEG-fNIRS cookbook. Keep in mind that other combinations not yet listed there are likely possible, too. Feel free to contact us at any time when you have any questions, concerns or require any sort of consultation or advice.

Why is LiveAmp with Spectrum C23 a great option for mobile EEG-fNIRS?

The main reason why combining LiveAmp with Spectrum C23 from Cortivision is a great option for mobile EEG-fNIRS setups is: It provides freedom of movement and comfort to the participants. This is achieved because:

  • Both, LiveAmp and Spectrum C23, can transmit data wirelessly to their respective recording computer. They both also offer the alternative of recording directly to the amplifier, via memory cards.

  • The actiCAP snap holders as well as Spectrum C23 holders can be positioned in the same cap.

  • The LiveAmp can be positioned into the Spectrum C23 harness using the belt clips available in the LiveAmp Mobility Set.

  • Both amplifiers are small and lightweight.

  • Both amplifiers offer several synchronization possibilities, including Lab Streaming Layer (LSL) connections and direct trigger inputs.

How to combine Brain Products EEG LiveAmp with Cortivision’s cutting edge fNIRS system, Spectrum C23

In our demonstration at OHBM 2025, the synchronization was achieved by using a photo sensor with StimTrak connected to TriggerBox Plus sending wireless triggers to the LiveAmp (via STE compact), while the triggers to the fNIRS were sent via the stimulation computer using the RESP API connection in PsychoPy.

However, the versatility of these amplifiers also allows for other synchronization options:

  • Streaming the EEG and the fNIRS data to LSL, through the LiveAmp LSL connector (EEG) and CortiView 2 software (fNIRS).

  • Sending triggers via TriggerBox Plus to both the LiveAmp (wirelessly via STE compact) and to Spectrum C23 (via LSL input option in CortiView 2 software).

  • Depending on the application, the trigger inputs available on both the Spectrum C23 (3-bit input) and the LiveAmp (1-bit input, plus 8-bit input with STE compact) could be used.

If you are interested in more EEG-fNIRS possibilities, contact your local distributor or get in touch with us – we are happy to help.

Go to EEG-fNIRS Cookbook
Go to tested EEG-fNIRS Combinations

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