This study implemented a 2 × 32‐channel EEG hyperscanning recording mainly by using BrainAmp DC amplifiers and actiCAP slim active electrodes (Brain Products). Two separate electrode boxes, that is, actiCAP ControlBox, between the amplifier and electrodes facilitated individual EEG recording with independent ground and reference. The USB2 Adapter served as an EEG acquisition hub, synchronizing amplifiers and linking to the recording computer through fiber optic cables. The 32 electrodes on the EEG cap (Easycap) were arranged according to the extended International 10–20 system to record signals at the sites of Fp1, Fz, F3, F7, FT9, FC5, FC1, C3, T7, TP9, CP5, CP1, Pz, P3, P7, O1, Oz, O2, P4, P8, TP10, CP6, CP2, Cz, C4, T8, FT10, FC6, FC2, F4, F8, and FP2. The ground and reference electrodes were positioned at the scalp sites of Fpz and FCz, respectively. Conductive gel (SuperVisc Easycap) was applied between the electrodes and scalp to maintain impedance below 10 kΩ. The sampling rate was 1000 Hz, and the DC resolution was 24 bits.
Acticap slim active electrodes
Manufactured by Brain Products
Sourced in Germany
The ActiCAP slim active electrodes are a compact and lightweight electrode system designed for EEG/fNIRS research. The electrodes feature active amplification circuitry and are optimized for high signal quality and low power consumption.
Automatically generated - may contain errors
Lab products found in correlation
Actichamp, by Brain Products (3 mentions)
Elefix eeg electrode paste, by Nihon Kohden (2 mentions)
Super visc high viscosity electrolyte gel, by EASYCAP (2 mentions)
Brain vision recorder software, by Brain Products (2 mentions)
Brainamp dc amplifier, by Brain Products (1 mentions)
Elastic cap, by EASYCAP (1 mentions)
Brainamp mr plus eeg amplifiers, by Brain Products (1 mentions)
Live amp wireless amplifier, by Brain Products (1 mentions)
6 protocols using acticap slim active electrodes
1
32-Channel EEG Hyperscanning Setup
2
64-Channel EEG Acquisition and Digitization
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64-channel EEG was obtained using a BrainVision actiCHamp Plus amplifier, with ActiCAP slim active electrodes in an extended 10–20 system montage (actiCHamp, Brain Products GmbH, Munich, Germany). EEG data were online referenced to Cz and recorded using BrainVision Recorder software v1.24.0001 (Brain Products GmbH, Germany). Impedances were monitored and percentage of channels with impedances <10 kΩ was 94.38 ∓ 6.75%. Electrode locations were digitized using Localite (Localite TMS Navigator, Alpharetta, GA).
3
EEG Setup and Recording for Research
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EEG was recorded using 64 actiCap slim active electrodes (Brain Products GmbH, Gilching, Germany), with 62 electrodes embedded within an elastic cap (Easycap GmbH, Herrsching, Germany). This included the reference positioned at CPz and ground at AFz. The remaining electrodes were the left and right electrooculography (EOG) electrodes (placed below and above each eye, respectively), and left and right electromyography (EMG) electrodes (placed on the chin). Fig. S1 shows the EEG electrodes layout. Elefix EEG-electrode paste (Nihon Kohden, Tokyo, Japan) was used for stable electrode attachment and Super-Visc high viscosity electrolyte gel (Easycap GmbH) was inserted into each electrode to reduce impedance below 25 kOhm. To amplify the signal, we used either two BrainAmp MR plus EEG amplifiers or LiveAmp wireless amplifiers (all from Brain Products GmbH). Signals were recorded using BrainVision Recorder software (Brain Products GmbH).
4
High-Density EEG Signal Acquisition
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Sixty‐four‐channel EEG data were obtained using a BrainVision actiCHamp Plus amplifiers (5 kHz sampling rate), with ActiCAP slim active electrodes in an extended 10–20 system montage (actiCHamp, Brain Products GmbH, Munich, Germany). EEG data were online referenced to Afz, recorded using BrainVision Recorder software v1.24.0001 (Brain Products GmbH, Germany). Impedances were maintained below 5 kΩ.
5
64-Channel High-Density EEG Acquisition
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64-channel EEG was obtained using a BrainVision actiCHamp Plus amplifier, with ActiCAP slim active electrodes in an extended 10–20 system montage (actiCHamp, Brain Products GmbH, Munich, Germany) with a 25 kHz sampling rate to reduce the spread of the pulse artifact50 (link). EEG data were online referenced to Cz and recorded using BrainVision Recorder software v1.24.0001 (Brain Products GmbH, Germany). Impedances were monitored and percentage of channels with impedances < 10 kΩ was 94.38 ∓ 6.75%. Electrode locations were digitized using Localite (Localite TMS Navigator, Alpharetta, GA).
6
Detailed Multi-Channel EEG Recording Protocol
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EEG was recorded using 64 actiCap slim active electrodes (Brain Products GmbH, Gilching, Germany), with 62 electrodes embedded within an elastic cap (Easycap GmbH, Herrsching, Germany). This included the reference positioned at CPz and ground at AFz. The remaining electrodes were the left and right electrooculography (EOG) electrodes (placed below and above each eye, respectively), and left and right electromyography (EMG) electrodes (placed on the chin). Fig. S2 shows the EEG electrodes layout. Elefix EEG-electrode paste (Nihon Kohden, Tokyo, Japan) was used for stable electrode attachment and Super-Visc high viscosity electrolyte gel (Easycap GmbH) was inserted into (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission.
The copyright holder for this preprint this version posted April 29, 2022. ; https://doi.org/10.1101/2022.04.28.489844 doi: bioRxiv preprint each electrode to reduce impedance below 25 kOhm. To amplify the signal, we used either two BrainAmp MR plus EEG amplifiers or a LiveAmp wireless amplifier (all from Brain Products GmbH). Signals were recorded using BrainVision Recorder software (Brain Products GmbH).
The copyright holder for this preprint this version posted April 29, 2022. ; https://doi.org/10.1101/2022.04.28.489844 doi: bioRxiv preprint each electrode to reduce impedance below 25 kOhm. To amplify the signal, we used either two BrainAmp MR plus EEG amplifiers or a LiveAmp wireless amplifier (all from Brain Products GmbH). Signals were recorded using BrainVision Recorder software (Brain Products GmbH).
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