Neural Noise- Functional near-infrared spectroscopy (fNIRS) of the cerebellum during motor tasks supports non-invasive motor neuroimaging.1
- Cerebellar fNIRS is feasible and has method relevance for motor decoding and potential BCI/fNIRS applications.1
- The study is published in Nature.1 1
Weekly enrichment (2026-07-20)
- The Nature Scientific Reports study tested whether NIRS can measure cerebellar neurovascular coupling during standardized clinical motor tasks in healthy subjects, the first such work to use validated bedside cerebellar tests.2
- Two clinically validated tasks were used—Task 1 to engage cerebellar function and Task 2 to engage corticospinal motor activity—in an environment that eliminated confounding visual and auditory stimuli, with a 2-minute rest for baseline stabilization.2
- Protocol 1 used 5 optodes (4 LED sources and 1 detector, 4 recording channels) spaced 3 cm apart with single-tipped fiber-optic detectors.2
- Protocol 2 used 10 optodes (2 sources and 8 detectors, 8 recording channels) spaced 2 cm apart with dual-tipped fiber-optic detectors.2
- Protocol 2 produced stable recordings in 100% of subjects versus only 50% with Protocol 1.2
- Protocol 2 detected increased cerebellar neurovascular coupling beyond inherent corticospinal activity during Task 1 compared with Task 2, though it did not completely isolate cerebellar activity.2
- The authors conclude Protocol 2 is the superior configuration for cerebellar NIRS, supporting a portable, low-cost alternative to fMRI for cerebellar motor assessment.23
- A recurring methodological challenge is placing optodes to circumvent shielding by neck muscles, and cerebellar hemodynamic responses differ from those of the cerebral cortex.3