The Cortivision SPECTRUM is a lightweight, wearable, wireless fNIRS platform that can accommodate two bundles of 12 LED sources and 8 SiPD detectors. Two Spectrum amplifiers can be used together for a maximal setup with 48 sources and 32 detectors – more than enough for whole head fNIRS coverage.
Optode positions are fully configurable within the 10-5 EEG system for researchers who prefer denser arrays. Any source can be positioned near a detector in order to create a short channel – the proportion and positioning of short channels in your fNIRS montage will now be entirely up to you. The optode bundles also come with an integrated gyroscope and accelerometer for easier movement artifact control during data pre-processing. The movement sensor is optode-shaped and can be positioned into its own holder on the cap.
The system includes EasyCap caps in size increments of 2 cm (adult sizes 54 to 60 cm), allowing for better fit to participants’ heads. The same caps can accommodate holders for EEG electrodes in case you want to do combined EEG-fNIRS research.
It is easy to use the SPECTRUM in combined modality research and it can be synced with presentation software and other hardware through LabStreaming Layer (LSL, https://labstreaminglayer.org/#/) or through a 3-bit port that can receive hardware TTL triggers.
