Decoding naturalistic movie clip identities from diffuse optical tomography measures of human brain activity

Markow, Zachary E.; Tripathy, Kalyan; Trobaugh, Jason W.; Svoboda, Alexa M.; Schroeder, Mariel L.; Rafferty, Sean M.; Richter, Edward J.; Eggebrecht, Adam T.; Anastasio, Mark A.; Culver, Joseph P.

doi:10.1117/12.2578609

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…24 Of these potential improvements, better spatial resolution is of particular interest to improve the ability of fNIRS to study cortical processes and their application to BCI. Using ultra high density DOT, Markow et al 50 discussed how the point-spread function decreased as the optode density increased, demonstrated that a 6.5 mmspaced optode DOT system covering visual cortex yielded higher decoding accuracy than their previous 13 mm-spaced DOT system in decoding naturalistic movie clips seen by human subjects, and attributed the decoding improvements to better spatial resolution associated with the higher optode density. A key limitation of BOLD imaging techniques, such as fNIRS and fMRI, has been their low temporal resolution, restricted by the relatively long time course of the hemodynamic response.…”

Section: Discussionmentioning

confidence: 99%

“…We did not apply full tomographic reconstruction as in Ref. 50 . Somatotopy and functional organizations in the motor cortex, especially in the hand-motor cortex, are spatially convoluted and functional areas contain significant overlaps, 53 – 56 such that sensor-space analysis and naive infinite-slab tomography models may not be sufficient to distinguish the responses.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Scalable, modular continuous wave functional near-infrared spectroscopy system (Spotlight)

Anaya,

Batra,

Bracewell

et al. 2023

J. Biomed. Opt.

View full text Add to dashboard Cite

.SignificanceWe present a fiberless, portable, and modular continuous wave-functional near-infrared spectroscopy system, Spotlight, consisting of multiple palm-sized modules—each containing high-density light-emitting diode and silicon photomultiplier detector arrays embedded in a flexible membrane that facilitates optode coupling to scalp curvature.AimSpotlight’s goal is to be a more portable, accessible, and powerful functional near-infrared spectroscopy (fNIRS) device for neuroscience and brain–computer interface (BCI) applications. We hope that the Spotlight designs we share here can spur more advances in fNIRS technology and better enable future non-invasive neuroscience and BCI research.ApproachWe report sensor characteristics in system validation on phantoms and motor cortical hemodynamic responses in a human finger-tapping experiment, where subjects wore custom 3D-printed caps with two sensor modules.ResultsThe task conditions can be decoded offline with a median accuracy of 69.6%, reaching 94.7% for the best subject, and at a comparable accuracy in real time for a subset of subjects. We quantified how well the custom caps fitted to each subject and observed that better fit leads to more observed task-dependent hemodynamic response and better decoding accuracy.ConclusionsThe advances presented here should serve to make fNIRS more accessible for BCI applications.

show abstract

Section: Discussionmentioning

confidence: 99%