English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Background/Introduction: Concurrent electroencephalography and resting-statefunctional magnetic resonance imaging (rsfMRI) have been widely used forstudying the (presumably) awake and alert human brain with hightemporal/spatial resolution. Although rsfMRI scans are typically collectedwhile individuals are instructed to focus their eyes on a fixated cross,objective and verified experimental measures to quantify degree of vigilanceare not readily available. Electroencephalography (EEG) is the modalityextensively used for estimating vigilance, especially during eyes-closedresting state. However, pupil size measured using an eye-tracker device couldprovide an indirect index of vigilance. Methods: Three 12-min resting scans(eyes open, fixating on the cross) were collected from 10 healthy controlparticipants. We simultaneously collected EEG, fMRI, physiological, andeye-tracker data and investigated the correlation between EEG features, pupilsize, and heart rate. Furthermore, we used pupil size and EEG features asregressors to find their correlations with blood-oxygen-level-dependent fMRImeasures. Results: EEG frontal and occipital beta power (FOBP) correlates withpupil size changes, an indirect index for locus coeruleus activity implicatedin vigilance regulation (r = 0.306, p < 0.001). Moreover, FOBP also correlatedwith heart rate (r = 0.255, p < 0.001), as well as several brain regions in theanticorrelated network, including the bilateral insula and inferior parietallobule. Discussion: In this study, we investigated whether simultaneousEEG-fMRI combined with eye-tracker measurements can be used to determine EEGsignal feature associated with vigilance measures during eyes-open rsfMRI. Ourresults support the conclusion that FOBP is an objective measure of vigilancein healthy human subjects.

brain connectivity

Integration of Simultaneous Resting-State Electroencephalography,  Functional Magnetic Resonance Imaging, and Eye-Tracker Methods to Determine  and Verify Electroencephalography Vigilance Measure