Wireless EEG: A survey of systems and studies

NeuroImage, Journal Year: 2022, Volume and Issue: 269, P. 119774 - 119774

Published: Dec. 22, 2022

The popular brain monitoring method of electroencephalography (EEG) has seen a surge in commercial attention recent years, focusing mostly on hardware miniaturization. This led to varied landscape portable EEG devices with wireless capability, allowing them be used by relatively unconstrained users real-life conditions outside the laboratory. wide availability and relative affordability these provide low entry threshold for newcomers field research. large device variety at times opaque communication from their manufacturers, however, can make it difficult obtain an overview this landscape. Similarly, given breadth existing (wireless) knowledge research, challenging get started novel ideas. Therefore, paper first provides list 48 along number important-sometimes difficult-to-obtain-features characteristics enable side-by-side comparison, brief introduction each aspects how they may influence one's decision. Secondly, we have surveyed previous literature focused 110 high-impact journal publications making use EEG, which categorized application analyzed used, channels, sample size, participant mobility. Together, basis informed decision respect experimental precedents when considering new, At same time, background material commentary about pitfalls caveats regarding increasingly accessible line

Language: Английский

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Open and reproducible neuroimaging: From study inception to publication

NeuroImage, Journal Year: 2022, Volume and Issue: 263, P. 119623 - 119623

Published: Sept. 12, 2022

Empirical observations of how labs conduct research indicate that the adoption rate open practices for transparent, reproducible, and collaborative science remains in its infancy. This is at odds with overwhelming evidence necessity these their benefits individual researchers, scientific progress, society general. To date, information required implementing throughout different steps a project scattered among many sources. Even experienced researchers topic find it hard to navigate ecosystem tools make sustainable choices. Here, we provide an integrated overview community-developed resources can support collaborative, open, replicable, robust generalizable neuroimaging entire cycle from inception publication across modalities. We review supporting study planning, data acquisition, management, processing analysis, dissemination. An online version this resource be found https://oreoni.github.io. believe will prove helpful institutions successful move towards reproducible eventually take active role future development.

Language: Английский

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Rhythms in cognition: The evidence revisited

European Journal of Neuroscience, Journal Year: 2022, Volume and Issue: 55(11-12), P. 2991 - 3009

Published: June 1, 2022

Brain activity abounds with rhythmic patterns (Capilla et al., 2021; Groppe 2013; Keitel & Gross, 2016) that reflect ongoing fluctuations of neuronal excitability (Adrian Matthews, 1934; Bishop, 1932). These rhythms can be described as oscillations cycle through phases at specific frequencies and a certain strength or amplitude (Figure 1). Attempts to account for the functional relevance have gone from associating cognitive function X Y more comprehensive understanding role brain in human everyday experience behaviour (Buzsáki Draguhn, 2004; Fries, 2015; Lakatos 2019; Wang, 2010). accounts support simple, yet fundamental idea: Cognitive functions themselves may intrinsically rhythmic. "The scanning apparatus should intrinsic period operation which identifiable performance brain. [...] In fact, it has order frequency appropriate alpha rhythm brain, shown electroencephalograms. We suspect this is associated form perception, partakes nature sweep rhythm, like process television apparatus." Theories derived these early ideas been reiterated over past 90 years. During time, research focussed on variations framework claiming processes depend offered wealth empirical evidence (Schroeder 2010; VanRullen, 2016; VanRullen Koch, 2003). Rhythmic sampling, implemented rhythms, proposed underlies not only perception but also attention (VanRullen 2007), memory (Staresina 2015), language (Giraud Poeppel, 2012). Linking cognition sampling particularly attractive because allows using global mechanistic principles bridge two different levels explanation: normal function, involves activity, experiences. addition, leaves open possibility actively intervening external stimulation either advance theory, example, close causal (see section 'Can we manipulate take control cognition?'), develop applications clinical interventions, such rehabilitation, brain-computer interfaces. The field, however, immune controversy. available does unequivocally assumed visual processing (Benwell 2017; Chaumon Busch, 2014; Fekete 2018; O'Hare, 1954; Ruzzoli van Diepen Van Walsh, 1952), various theoretical inconsistencies highlighted (Fekete White, 2018). For instance, exact implicated often differ between studies task and/or stimulus characteristics (Chen 2020; Ho Merholz 2022; Ronconi see table 2019), difficult reconcile any simple model fixed, discrete temporal 'frames' (White, Additionally, effect sizes showing periodicity behavioural neural measures tend small, hence line clear, all-or-nothing frame boundaries (Milton Pleydell-Pearce, 2018) utility real-life (Vigué-Guix 2020). Furthermore, literature suffers lack direct replications, pre-registered studies, data, code sharing (Garrett-Ruffin Niso Pavlov 2021), well low statistical power (Button 2013). Finally, publication bias favour statistically significant results distorted undermined reliability published (Szucs Ioannidis, 2017). Despite extensive research, existence remain intensely debated, idea continues attract vast interest. Special Issue, called methodologically principled irrespective their outcome, would contribute clarifying if, under conditions, observed. addition 26 original articles (including conceptual replications), received reviews, methodological advances, position papers. Following our aim re-visit cognition, evaluated primary outcomes 23 tested hypothesis directly. A split picture emerged 11 reporting supportive 12 others null inconclusive findings Figure 2). Within context, here review 36 publications Issue an emphasis how each contribution informs questions controversies wider cognition. doing so, cluster contributions around prevalent topics – Does operate rhythmically? And if processes? majority come influence outcomes. Below, summarise previous lines discuss relevant Issue. Numerous demonstrated by probing time intervals relative reference event. Provided are distributed across wide-enough range sampled densely within range, resulting course submitted spectral analysis rhythmicity. This approach new (e.g., Latour, 1967; Purushothaman 2000) become increasingly popular last decade Dugué Fiebelkorn Landau 2012; Senoussi 2019). refer reader Kienitz al. (2021) overview experimental paradigms employed study during attentive vision both non-human primates. behaviour, debate surrounds potential dissociations frequencies. Michel addressed topic information up down theta (4–7 Hz) (8–12 rhythms. participants performed orientation judgement after non-informative cue (50% validity) indicated target location. observed precision oscillated invalidly cued targets, whilst guess rate validly targets. suggest distinct roles potentially subserving attentional fluctuations. However, authors suggested environmental likely drives spatial resolution, rather than strict succession perceptual snapshots blind gaps 'up' 'down' respectively. possible frequencies, degree fixed depends demands participant state remains unclear. regard, Balestrieri (2021, issue) showed interplay working memory. Rhythms detection were maintenance simultaneous task. Interestingly, was modulated load, oscillating ~7.5 Hz versus 5 high respectively, suggesting might depending allocation limited resources another Morrow Samaha whether occurs alpha-band (Chakravarthi Sokoliuk 2016), capitalising motion-related illusions: flash-lag Fröhlich effect. Indeed, according recently (K. A. Schneider, 2018), supported series 'perceptual moments', duration individual differences illusions. hypothesised effects driven endogenous peak participants, then magnitude illusion correlated individuals. successfully induced illusions all found no correlation Bayesian favoured single underlying oscillatory mechanism could Plöchl examined auditory modality. Their included visual, auditory, bimodal conditions task, closely replicated seminal Fries (2012). Specifically, they capitalised reset (in modality) automatically drive one (left vs. right) streams events uncued locations. fluctuated counter phase attended locations, confirming supramodal processing. modality entirely earlier finding where alpha-range (9 response decision making (Ho combined dichotic oddball paradigm test violating sensory expectations made novel observation stimuli played non-anticipated ear induce subsequent theta-range (7.6 accuracy. update representations following violations expectations. concluded that, although rhythmicity corroborated (growing) number special considerations analytical necessary Brookshire, 2021). need chosen, require large trials participants. On note, der Werf unable replicate (Fiebelkorn Helfrich modified Egly-Driver (Egly 1994) detecting appear end (i.e., location) other space-based, non-cued bar, equidistant bar (object-based, location). No pattern accuracy locations level predictive validity, though exploratory did reveal ~7–8 when cues moderately informative. commentary al.'s study, proposes despite being comparable (Helfrich per condition replication too reliably detect further suggests purely data limiting combining simultaneously recorded electrophysiology (but ten Oever 2022, issue, Fiebelkorn's commentary). Magneto- electroencephalography (M/EEG) allow investigating activity. They enable analyses performance, detection, parameters (phase amplitude) presentation. Most M/EEG revolve question pre-stimulus affect attempting specific, previously untested conditions. EEG presented detected targets rhythmically counter-phase predicted modalities. Benwell challenging letter identification measure subjective awareness trial. confirmed reports (also By contrast, had accuracy, again replicating 1952). Similarly, Michail discrimination corresponding phase. unique aspect experiment long 2.5 s. Accordingly, speculate less lasting several cycles. Sheldon Mathewson set out post-stimulus likelihood guessing. reproduced precisely analysed error distribution models yield separate estimates Conceptually, similar who 'Rhythmicity behaviour'). (Mathewson 2009; Fakche 2022), performance. Instead, 2–7 activities Zazio issue), turn, clear behaviour. resembled (Busch 2009), reported Using MEG source analysis, stimulus-evoked inversely related occipito-temporal areas, whereas localised occipital prefrontal areas. Whilst assessed analysing Es (2020, used vector machine decode (counter/clockwise) signal. classification along theta/alpha frontal eye field parietal cortex contralateral grating stimulus. reflected (reaction times), leaving unknown. Gaillard Ben Hamed neurophysiological argue seems continuously regions alternates periodically center periphery parieto-frontal networks. two-stage positing combination continuous interact conscious percepts (Herzog Vigué-Guix attempted demonstrate interesting features stand section. First, aimed Callaway Yeager (1960), papers looking into idea. closed-loop analyse real-time (bright LED flashes) selectively rhythm. Second, kept eyes closed throughout experiment, amplified facilitated extracting its comparably small sample demonstrating level. reliable estimation parameter managed present accordingly, onset times participant. putative sizable enough practical relevance, signal interface applications. Along phase, recent investigated instantaneous within- between-participant integration temporally proximal (Samaha Postle, 2015) multisensory (audiovisual) (Cecere Keil Senkowski, 2017), theory cycles (VanRullen, 2016). London (2022, extend audiovisual supra-threshold stimuli. occipito-parietal electrodes increased sensitivity, found. results, those (Buergers Noppeney, cast doubt notion determining factor sensitivity perception. provided reviewed thus far provide answer way Behavioural issue frequently perhaps surprising contrasts suggestion (Fiebelkorn, 2021, given represents measurement question. tasks appears quite robust, (see, e.g., D. Schneider (Zazio Therefore, markedly weaker compared effects. aligns Benwell, Keitel, Notably, even subset considered attempts (Plöchl Der least very designs (van mixed. Replication extension key will critical development (Pavlov valuable examples. It crucial methodologies optimised 2022). flaws (such power), important validated replications. ideally trial numbers) terms overall size. collaborative run labs (Open Science Collaboration, 2015). Another future step derive hypotheses existing theories about tasks, states (and not). 1932) predicts is, excitability. arguably case short durations contrast feature longer (Michail Mathewson, issue). challenge define benchmark 'just works', stimuli, trusted fields neuroscience developed conventional eliciting interest, capture (Theeuwes, 1992), cueing (Carrasco, 2011), markers (Ngiam Establishing standard vantage point chart determine affects Manipulating periodic tool sampling. As Quigley reports, dates back Adrian Matthews (1934) Walter (1954), light light-induced responses synchronisation inputs since termed 'entrainment'. entrainment remained pervasive drew strengths major routes: explanatory functions, versatility technique experimenters and, later on, interventionists. Regarding power, Dynamic Attending Theory, posits internal oscillators rhythms) synchronise (Jones Boltz, 1989; Henry Herrmann, 2014). Once established, synchronised cycling optimal cortical coincide upcoming facilitates Lakatos, 2009). widely promoted general interactions input (Lakatos Tavano emblematic crucially underlie ability tune segment understand speech Rimmele Hauswald 2020, From perspective experimenters, versatile method directly manipulating Next stimulation, magnetic electrical non-invasive (NIBS) (Thut, Schyns, 2011). prospect influencing inspired interventions pathological please Tichko (2020) gamma-frequency (40 attempt counteract pathophysiologies linked Alzheimer's disease (Iaccarino strong integrating music-based currently therapy. enthusiastically overall, unclear, implementing applies circumscribed situations. One significance benefits beyond regularities input. implements selective (Calderone 2013), facilitate behaviourally providing periods Barne predictably recurring (here: tone frequency) lead higher predictable features, embedded regular sequences. interleaved instructed compare them probe brief retention interval. Although find benefit non-rhythmic de Graaf Duecker, W. M. Lin, Oetringer, Rassili Ordin, Sun nor pre-probe templates period, cortices intermittent pre-activation anticipation anticipatory anti-phasic activation supports puts maximally excitable (potential) delivery. Moreover, self-sustain ceases. Lin three experiments versions pitch total 181 occurring discriminated faster accurately out-of-phase. first experiments, low-frequency 1–3 Hz. paradigm, Hickok (2015) in-phase easily, entrainment. findings. After amplitude-modulated noise, responded tones constant noise pre-target noise. some periodicities consistently Saberi Hickok, Ordin presenting sequence (linguistic) syllables (non-linguistic) natural sounds similarly affected intermediately sound. neither type exceeded irregular Further hinted reactio

Language: Английский

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Optimizing spatial specificity and signal quality in fNIRS: an overview of potential challenges and possible options for improving the reliability of real-time applications

Frontiers in Neuroergonomics, Journal Year: 2024, Volume and Issue: 5

Published: June 5, 2024

The optical brain imaging method functional near-infrared spectroscopy (fNIRS) is a promising tool for real-time applications such as neurofeedback and brain-computer interfaces. Its combination of spatial specificity mobility makes it particularly attractive clinical use, both at the bedside in patients' homes. Despite these advantages, optimizing fNIRS use requires careful attention to two key aspects: ensuring good maintaining high signal quality. While detects superficial cortical regions, consistently reliably targeting specific regions interest can be challenging, studies that require repeated measurements. Variations cap placement coupled with limited anatomical information may further reduce this accuracy. Furthermore, important maintain quality contexts ensure they reflect true underlying activity. However, signals are susceptible contamination by cerebral extracerebral systemic noise well motion artifacts. Insufficient preprocessing therefore cause system run on instead aim review article help advance progress fNIRS-based applications. It highlights potential challenges improving quality, discusses possible options overcome challenges, addresses considerations relevant By addressing topics, aims improve planning execution future studies, thereby increasing their reliability repeatability.

Language: Английский

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Using preregistration as a tool for transparent fNIRS study design

Neurophotonics, Journal Year: 2023, Volume and Issue: 10(02)

Published: March 8, 2023

The expansion of functional near-infrared spectroscopy (fNIRS) methodology and analysis tools gives rise to various design analytical decisions that researchers have make. Several recent efforts developed guidelines for preprocessing, analyzing, reporting practices. For the planning stage fNIRS studies, similar guidance is desirable. Study preregistration helps transparently document study protocols before conducting study, including materials, methods, analyses, thus, others verify, understand, reproduce a study. Preregistration can thus serve as useful tool transparent, careful, comprehensive design.We aim create guide on steps involved in studies provide template specified studies.The presented has strong focus specific requirements, associated provides examples based continuous-wave (CW) conducted humans. These can, however, be extended other types studies.On step-by-step basis, we walk user through key methodological analysis-related aspects central design. include items CW, task-based but also sections are general importance, an in-depth elaboration sample size planning.Our introduces these open science community, providing with overview specification recommendations planning. As such it used preregister or merely transparent

Language: Английский

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Managing EEG studies: How to prepare and what to do once data collection has begun

Psychophysiology, Journal Year: 2023, Volume and Issue: 60(11)

Published: June 14, 2023

In this paper, we provide guidance for the organization and implementation of EEG studies. This work was inspired by our experience conducting a large-scale, multi-site study, but many elements could be applied to any project. Section 1 focuses on study activities that take place before data collection begins. Topics covered include: establishing training teams, considerations task design piloting, setting up equipment software, development formal protocol documents, planning communication strategy with all team members. 2 what do once has already begun. (1) how effectively monitor maintain quality, (2) ensure consistent experimental protocols, (3) develop rigorous preprocessing procedures are feasible use in large-scale study. Links resources also provided, including sample software tracking forms, code, tutorial videos (to access resources, please visit: https://osf.io/wdrj3/).

Language: Английский

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ARTEM-IS for ERP: Agreed Reporting Template for EEG Methodology - International Standard for documenting studies on Event-Related Potentials

Published: Jan. 5, 2023

Given that the choices made during recording, preprocessing and analysis of event-related potentials (ERP) data can affect study outcomes, it is critical they are transparently reported to allow for reproducibility replicability. Yet, systematic reviews reporting practices in field have shown journal articles do not meet this goal guidelines writing them better resulted a sufficient improvement transparency.ARTEM-IS aims address issue by building dynamic, interactive web applications support documenting information required existing publication form standardised metadata template. Completing an ARTEM-IS results human-reader-friendly PDF machine-readable JSON summary methodological information, which allows level precision higher than what typically found articles. These be used as supplements publication, memory aid when paper, or records easier extraction comparison verbal descriptions papers.Here, we present ERP, supports describing typical ERP study, including most its core aspects (study description, experimental design, hardware, acquisition, pre-processing, measurement, visualisation, additional comments). We discuss current contents form, application functionalities, limitations, potential directions future developments. In addition, process through collaborative grassroots initiative described. Finally, argue wider adoption bring benefits different stakeholders: researchers themselves their collaborators, especially on large-scale projects, reviewers, readers scientific community at large.

Language: Английский

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Organoleptic properties and neuroimaging response on the perception of edible gels

Heliyon, Journal Year: 2025, Volume and Issue: 11(1), P. e41649 - e41649

Published: Jan. 1, 2025

The rapidly increasing number of elderly people in the world highlights need for development innovative foods with modified textures that do not expose to risks associated food consumption (risk aspiration, suffocation, and chocking). Providing specific such as edible gel population study their properties is a challenge scientific community. There are some available gels supermarkets destined sports population, texture technological could be used extrapolated senior people. To explore this potential, five types sport commercial purchased from local Slovak market were characterized order evaluate know if these suitable population. energy evaluated using acceptance testing, involving 75 seniors who important organoleptic attributes by combination hedonic intensity scales. same consumer panel then profiled Temporal Dominance Sensations (TDS) technique. prevalence neophobia was measured Food Neophobia Scale (FNS) also neuroimaging biometric methods. results suggest there significant differences perception gels, confirmed measurements via electroencephalography (EEG) Facereading. We conclude suggesting potential our findings confirm composition sustainable may elicit different perceptions. This use methods research create more optimal formulations populations.

Language: Английский

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The Practical Implications of Re-Referencing in ERP Studies: The Case of N400 in the Picture–Word Verification Task

Diagnostics, Journal Year: 2025, Volume and Issue: 15(2), P. 156 - 156

Published: Jan. 11, 2025

Background: The selection of an optimal referencing method in event-related potential (ERP) research has been a long-standing debate, as it can significantly influence results and lead to data misinterpretation. Such misinterpretation produce flawed scientific conclusions, like the inaccurate localization neural processes, practical applications, such using ERPs biomarkers medicine, may result incorrect diagnoses or ineffective treatments. In line with development advancement good practice (GSP) ERP research, this study sought address several questions regarding most suitable digital reference for investigating N400 component. Methods: was conducted on 17 neurotypical participants. Based previous references evaluated included common average (AVE), mean earlobe (EARS), left mastoid (L), mastoids (MM), neutral infinity (REST), vertex (VERT). Results: showed that all references, except VERT, successfully elicited centroparietal effect picture-word verification task. AVE set metrics terms size localization, although also produced smallest difference waves. similar topographic dynamics window were observed between REST methods. Conclusions: As regions interest (ROI) effect, nine electrode sites spanning from superior frontocentral parietal identified, showing consistent effects across methods VERT.

Language: Английский

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Measuring Realistic Emotional Perception With EEG: A Comparison of Multimodal Videos and Naturalistic Scenes

Psychophysiology, Journal Year: 2025, Volume and Issue: 62(1)

Published: Jan. 1, 2025

ABSTRACT Emotional experiences involve dynamic multisensory perception, yet most EEG research uses unimodal stimuli such as naturalistic scene photographs. Recent suggests that realistic emotional videos reliably reduce the amplitude of a steady‐state visual evoked potential (ssVEP) elicited by flickering border. Here, we examine extent to which this video‐ssVEP measure compares with well‐established Late Positive Potential (LPP) is larger for relative neutral scenes. To address question, 45 participants viewed 90 matched pairs and Consistent prior work, reduced 7–8 Hz ssVEP was evident during videos. However, reduction in power not specific driving frequency 7.5 Hz, fact, Fourier transformation analyses limited were modulated video content. Still, at group level, video‐driven reductions LPP modulation scenes produced similarly large valence effects, both measures strongly correlated arousal ratings. previous research, scene‐LPP sensitive contents (erotica gore) somewhat inconsistent In contrast, oscillation did show content sensitivity better explained individual ratings per clip. sum, these results flickering‐border paradigm does index engagement stimuli, do evoke robust decreases 3–10 oscillatory distinct from scene‐evoked LPP. Matched responses compared within‐participant. Our findings align indicating around (7–8 Hz) serves reliable measure. further reveal effect attributable general decrease across range.

Language: Английский

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