Input Shape Effect on Classification Performance of Raw EEG Motor Imagery Signals with Convolutional Neural Networks for Use in Brain—Computer Interfaces

Brain Sciences, Journal Year: 2023, Volume and Issue: 13(2), P. 240 - 240

Published: Jan. 31, 2023

EEG signals are interpreted, analyzed and classified by many researchers for use in brain-computer interfaces. Although there different signal acquisition methods, one of the most interesting is motor imagery signals. Many processing machine learning deep models have been developed classification Among these, Convolutional Neural Network generally achieve better results than other models. Because size shape data important training discovering right relationships, designed experimented with input structures. However, no study has found literature evaluating effect shapes on model performance accuracy. In this study, effects accuracy were investigated, which had not specifically studied before. addition, preprocessing take a long time before classification, used; rather, two CNN using raw data. Two datasets, BCI Competition IV 2A 2B, used processes. For shapes, 53.03-89.29% 2-23 s epoch obtained dataset, 64.84-84.94% 4-10 2B dataset. This showed that significant performance, when correct selected architecture developed, feature extraction can be done well without any preprocessing.

Language: Английский

---

Study of the Acute Stress Effects on Decision Making Using Electroencephalography and Functional Near-Infrared Spectroscopy: A Systematic Review

IEEE Access, Journal Year: 2024, Volume and Issue: 12, P. 53454 - 53474

Published: Jan. 1, 2024

This systematic review provides a comprehensive analysis of studies that use electroencephalography (EEG) and functional near-infrared spectroscopy (fNIRS) to investigate how acute stress affects decision-making processes. The primary goal this was examine the influence on decision making in challenging or stressful situations. Furthermore, we aimed identify specific brain regions affected by explore feature extraction classification methods employed enhance detection under pressure. Five academic databases were carefully searched 27 papers satisfied inclusion criteria found. Overall, results indicate potential utility EEG fNIRS as techniques for identifying during gaining knowledge about mechanisms underlying reactions. However, varied these small sample sizes highlight need additional develop more standardized approaches effects tasks. implications findings development induction technology process are also explained.

Language: Английский

---

Bridging the Gap between Psychophysiological and Audiological Factors in the Assessment of Tinnitus: An EEG Investigation in the Beta Band

Brain Sciences, Journal Year: 2024, Volume and Issue: 14(6), P. 570 - 570

Published: June 3, 2024

Background: Despite substantial progress in investigating its psychophysical complexity, tinnitus remains a scientific and clinical enigma. The present study, through an ecological multidisciplinary approach, aims to identify associations between electroencephalographic (EEG) psycho-audiological variables. Methods: EEG beta activity, often related stress anxiety, was acquired from 12 patients (TIN group) 7 controls (CONT during audio cognitive task at rest. We also investigated psychological (SCL-90-R; STAI-Y; BFI-10) audiological (THI; TQ12-I; Hyperacusis) variables using non-parametric statistics assess differences relationships within groups. Results: In the TIN group, frontal activity positively correlated with hyperacusis, parietal trait anxiety; latter is associated depression CONT. Significant paranoid ideation openness were found Conclusions: connection anxiety trait, fronto-parietal cortices hyperacusis provides insights into brain functioning patients, offering quantitative descriptions for clinicians new treatment hypotheses.

Language: Английский

---

A narrative review of the interconnection between pilot acute stress, startle, and surprise effects in the aviation context: Contribution of physiological measurements

Frontiers in Neuroergonomics, Journal Year: 2023, Volume and Issue: 4

Published: Feb. 23, 2023

Aviation remains one of the safest modes transportation. However, an inappropriate response to unexpected event can lead flight incidents and accidents. Among several contributory factors, startle surprise, which or exacerbate pilot's state stress, are often cited. Unlike has been subject much study in context driving piloting, studies on surprise less numerous these concepts sometimes used interchangeably. Thus, definitions startle, reviewed, related differences put evidence. Furthermore, it is proposed distinguish notions evaluation add physiological measures subjective their study. Indeed, Landman's theoretical model makes possible show links between using parameters that they would make disentangle aviation. Finally, we draw some perspectives set up further focusing specifically measurement.

Language: Английский

---

Behavioral and cortical dynamics underlying superior accuracy in short-distance passes

Behavioural Brain Research, Journal Year: 2024, Volume and Issue: 471, P. 115120 - 115120

Published: June 20, 2024

Improved pass accuracy is a prominent determinant of success in football. It demands an effective interaction complex behavioral and cortical dynamics. Exploring differences the ability to sustain accurate behavior stable setting associated dynamics at different expertise levels may provide insight into skilled strategies contributing superior The aim this study compare trial-to-trial variability biomechanics corresponding during short-distance passes between novices experienced football players. Thirty participants (15 novices, 15 players) performed 90 passes. intertrial (foot acceleration, range hip flexion, knee flexion foot rotation) was assessed by means multiscale entropy. task-related were analyzed via source-derived event-related spectral perturbations. Experienced players demonstrated higher overall lower entropy values across multiple time scales which significant for flexion. electroencephalography data revealed group parieto-occipital alpha desynchronization frontal theta synchronization successive phases current findings suggest that show recruit retain promoting accuracy, whereas explorative with spatial variability. This difference be distinctive visuospatial attentional acquired Our provides expertise-specific basis its prospective investigation enriched contexts.

Language: Английский

---

EEG and fNIRS are associated with situation awareness (hazard) prediction during a driving task

Ergonomics, Journal Year: 2024, Volume and Issue: 67(12), P. 1993 - 2008

Published: June 20, 2024

Situation awareness (SA) is important in many demanding tasks (e.g. driving). Assessing SA during training can indicate whether someone ready to perform the real world. typically assessed by interrupting task ask questions about situation or asking after completion, assessing only momentary SA. An objective and continuous means of detecting needed. We examined neurophysiological sensors are useful objectively measure Level 3 (projection events into future) a driving task. measured speed at which participants responded accuracy responses. For EEG, beta theta power were most sensitive response time. fNIRS, oxygenated haemoglobin (HbO) was accuracy. This first evidence our knowledge that measures for an ecologically valid

Language: Английский

---

Virtual and Reality: A Neurophysiological Pilot Study of the Sarcophagus of the Spouses

Brain Sciences, Journal Year: 2023, Volume and Issue: 13(4), P. 635 - 635

Published: April 7, 2023

Art experience is not solely the observation of artistic objects, but great relevance also placed on environment in which art takes place, often museums and galleries. Interestingly, last few years, introduction some forms virtual reality (VR) museum contexts has been increasing. This solicited enormous research interest investigating any eventual differences between looking at same artifact either a real context (e.g. museum) VR. To address such target, neuroaesthetic study was performed electroencephalography (EEG) autonomic signals (heart rate skin conductance) were recorded during Etruscan "Sarcophagus Spouses", both VR reproduction. Results from EEG analysis showed higher level Workload Index compared to (p = 0.04), while Approach-Withdrawal highlighted increased levels 0.03). Concerning indices, elicited Emotional response than Overall, preliminary results suggest engagement potential VR, although could favour embodiment museum.

Language: Английский

---

EEG-based stress identification and classification using deep learning

Multimedia Tools and Applications, Journal Year: 2023, Volume and Issue: 83(14), P. 42703 - 42719

Published: Oct. 11, 2023

Language: Английский

---

Nanocomposite-Based Electrode Structures for EEG Signal Acquisition

Crystals, Journal Year: 2022, Volume and Issue: 12(11), P. 1526 - 1526

Published: Oct. 27, 2022

Objective: To fabricate a lightweight, breathable, comfortable, and able to contour the curvilinear body shape, electrodes built on flexible substrate are significant growth in wearable health monitoring. This research aims create GNP/FE electrode-based EEG signal acquisition system that is both efficient inexpensive. Methodology: Three distinct electrode concentrations were developed for acquisition, three (1.5:1.5, 2:1, 3:0). The high strength-to-weight ratio form tribofilm fabrication of will provide good efficiency. first subjected wavelet transform, which serves as preliminary analysis. use biopotential signals systems biofeedback or control commands expected substantially impact point-of-care monitoring systems, rehabilitation devices, human–computer/machine interfaces (HCI/HMI), brain–computer (BCIs). graphene oxide (GO), glycerol (GL), polyvinyl alcohol (PVA) GO/GL/PVA plastic measured compared commercially available using biopic equipment. was detect satisfactorily after being used two months, demonstrating conductivity lower noise than commercial electrode. nanocomposite mixture put into mold soon it ready then rapidly chilled. Results: quality an acquired could be several ways including by its error percentage, correlation coefficient, signal-to-noise (SNR). fabricated yield detection ranged from 0.81 kPa−1 % 34.90 kPa−1%. performance estimated up response 54 ms. Linear heating at rate 40 °C per minute implemented sample ranges 0 240 °C. During testing analysis, obtained low impedance with when conventional wet type Conclusions: A large database frequently all simulated MATLAB code. Through experiment, required data collected, checked against other signals, proven they accurate representations intended database. Evidence suggests nanoplatelets (GNP) hematite (FE2O3) polyvinylidene fluoride (PVDF) GNP/FE2O3@PVDF 3:0 concentration yielded best outcomes.

Language: Английский

---

Measurement and Quantification of Stress in the Decision Process: A Model-Based Systematic Review

Intelligent Computing, Journal Year: 2024, Volume and Issue: 3

Published: Jan. 1, 2024

This systematic literature review comprehensively assesses the measurement and quantification of decisional stress using a model-based, theory-driven approach. It adopts dual-mechanism model capturing both System 1 2 thinking. Mental stress, influenced by factors such as workload, affect, skills, knowledge, correlates with mental effort. aims to address 3 research questions: (a) What constitutes an effective experiment protocol for measuring physiological responses related stresses? (b) How can signals triggered be measured? (c) stresses quantified features? We developed search syntax inclusion/exclusion criteria based on model. The we conducted in databases (Web Science, Scopus, PubMed) resulted 83 papers published between 1990 September 2023. synthesis focuses design, measurement, quantification, addressing questions. emphasizes historical context, recent advancements, identified knowledge gaps, potential future trends. Insights into markers, techniques, proposed analyses, machine-learning approaches are provided. Methodological aspects, including participant selection, stressor configuration, choosing devices, critically examined. comprehensive describes practical implications decision-making practitioners offers insights research.

Language: Английский

---