In state-of-the-art electroencephalography (EEG) Silver/Silver-Chloride electrodes are applied together with electrolyte gels or pastes. Their application requires extensive preparation, trained medical staff and limits measurement time mobility. We recently proposed a novel multichannel cap system for dry EEG mobile out-of-the-lab acquisition. During the tests these polymer-based multipin electrodes, we observed that quality of recording depends on normal force resulting contact pressure....

Novel state-of-the-art amplifier and cap systems enable Electroencephalography (EEG) recording outside of stationary lab during physical exercise body motion. However, extensive preparation time, cleaning, limited long-term stability conventional gel-based electrode pose significant limitations in out-of-the-lab conditions. Dry may contribute to rapid repetitive mobile EEG acquisition with significantly reduced cleaning requirements, possible self-application by the volunteer but are known...

Abstract High‐density electroencephalography (HD‐EEG) is currently limited to laboratory environments since state‐of‐the‐art electrode caps require skilled staff and extensive preparation. We propose evaluate a 256‐channel cap with dry multipin electrodes for HD‐EEG. describe the designs of made from polyurethane coated Ag/AgCl. compare in study 30 volunteers novel HD‐EEG conventional gel‐based electrode‐skin impedances, resting state EEG, visual evoked potentials (VEP). perform wearing...

Electrodes of silver/silver chloride (Ag/AgCl) are dominant in clinical settings for surface electromyography (sEMG) recordings. These electrodes need a conductive electrolyte gel to ensure proper performance, which dries during long-term measurements inhibiting the immediate electrode's reuse and is often linked skin irritation episodes. To overcome these drawbacks, new type dry based on architectured titanium (Ti) thin films were proposed this work. The microstructures zigzags, obtained...

Background EEG may be affected by artefacts hindering the analysis of brain signals. Data-driven methods like independent component (ICA) are successful approaches to remove from EEG. However, ICA-based developed so far often limitations, such as: need for visual inspection separated components (subjectivity problem) and, in some cases, and simultaneous recording inspected identify artefactual components; a potentially heavy manipulation signals; use linear classification methods; simulated...

A potential new area of routine application for electroencephalography (EEG) is the brain-computer interface, which might enable disabled people to interact with their environment, based on measured brain signals. However, conventional not suitable here due limitations arising from complicated, time-consuming and error-prone preparation. Recently, several approaches dry electrodes have been proposed. Our aim comparison assessment three types standard wet silver/silver-chloride EEG signal...

Important requirements for the analysis of multichannel EEG data are efficient techniques signal enhancement, decomposition, feature extraction, and dimensionality reduction. We propose a new approach spatial harmonic (SPHARA) that extends classical Fourier to sensors positioned non-uniformly on surface head. The proposed method is based eigenanalysis discrete Laplace-Beltrami operator defined triangular mesh. present several ways discretize continuous compare properties resulting basis...

Several plasma treatments using argon, oxygen, and nitrogen are studied in order to increase the interfacial adhesion of polyurethane/Ag:TiN system be used as biopotential electrodes. The optimized conditions (100 W, 15 min, regardless gas) promote a steep decrease water contact angle values. observed chemical topographic alterations translate into excellent treated samples. in‐service validation proposed Ag:TiN‐coated PU multipin electrodes is performed by acquiring EEG signals parallel...

Data contamination due to physiological artifacts such as those generated by eyeblinks, eye movements, and muscle activity continues be a central concern in the acquisition analysis of electroencephalographic (EEG) data. This issue is further compounded EEG sports science applications where presence notoriously difficult control because behaviors that generate these interferences are often under investigation. Therefore, there need develop effective efficient methods identify recordings...

Dry electrodes for electroencephalography (EEG) allow new fields of application, including telemedicine, mobile EEG, emergency and long-term repetitive measurements research, neurofeedback, or brain-computer interfaces. Different dry electrode technologies have been proposed validated in comparison to conventional gel-based electrodes. Most previous studies performed at a single center by operators. We conducted multi-center multi-operator study validating multipin the reproducibility...

This study investigates the feasibility of a dry electrode cap design for neonatal electroencephalogram (EEG) recordings. Recordings on phantom and real infant are compared between novel clinically used gel-based cap. The recordings included measuring both contact force signal quality during still respiration-like head motion. were assessed EEG signals’ spectral characteristics, including powerline interference. Compared to caps, caps showed largely comparable skin force, an expectedly...

Abstract Using EEG-hyperscanning, neuroscientists showed that non-verbal joint actions are associated with different patterns of interpersonal neural coupling (INC), influenced by factors such as the type action investigated, experimental task used, and analytical approach employed. The present systematic scoping review aims to identify categories investigated so far, tasks INC measures related main findings provide a comprehensive overview field. Thirty-nintharticles were included in this...

Abstract A novel quasi-dry electrode prototype, based on a polymer wick structure filled with specially designed hydrating solution is proposed for electroencephalography (EEG) applications. The new does not require the use of conventional electrolyte paste to achieve wet, low-impedance scalp contact. When compared standard commercial Ag/AgCl sensors, electrodes exhibit similar electrochemical noise and potential drift values. Lower impedances are observed when tested in human volunteers due...

Neuromodulation induced by transcranial electric stimulation (TES) exhibited promising potential for clinical practice. However, the underlying mechanisms remain subject of research. The combination TES and electroencephalography (EEG) offers great investigating these brain function in general, especially when performed simultaneously. In conventional applications, EEG suffers from limitations on electrode level (gel electrode-skin interface) usability (preparation time, reproducibility...

The cognitive performance of the crew has a major impact on mission safety and success in space flight. Monitoring during long-duration flight therefore is paramount importance can be performed using compact state-of-the-art mobile EEG. However, signal quality EEG may compromised due to vicinity various electronic devices constant movements. We compare noise characteristics between in-flight extraterrestrial microgravity ground-level terrestrial electroencephalography (EEG) recordings. data...

Abstract Objective. The aim of the present study was to elucidate brain dynamics underlying maintenance a constant force level exerted during visually guided isometric contraction task by optimizing predictive multivariate model based on global and spectral features. Approach. Electroencephalography (EEG) acquired in 18 subjects who were asked press bulb maintain level, indicated bar screen. For intervals 500 ms, we calculated an index stability as well indices dynamics: microstate metrics...

Dry electroencephalography (EEG) electrodes provide rapid, gel-free, and easy EEG preparation, but with limited wearing comfort. We propose a novel dry electrode comprising multiple tilted pins in flower-like arrangement. The Flower increases comfort contact area while maintaining ease of use. In study 20 volunteers, we compare the performance 64-channel cap to commercial Multipin sitting supine positions. was rated as significantly improved both channel reliability average impedances...

Electroencephalography (EEG) is increasingly used for repetitive and prolonged applications like neurofeedback, brain computer interfacing, long-term intermittent monitoring. Dry-contact electrodes enable rapid self-application. A common drawback of existing dry the limited wearing comfort during application. We propose a novel Arch electrode. Five semi-circular arches are arranged parallelly on baseplate. The electrode substrate material flexible thermoplastic polyurethane (TPU) produced by...