EEG was recorded during the TMS sessions with a 64-channel TMS-compatible EEG system (Waveguard™ cap and ASAlab™ software, ANT Neuro, Enschede, The Netherlands), a sampling frequency of 4 kHz and a common average reference. Electrode impedance was kept below 5 kOhm during the experiment. Participants were seated in a comfortable chair with their eyes open and arms in supine position. Prior to stimulation, baseline EEG was recorded for 10 min with eyes open (5 min) and closed (5 min).
Asalab software
Manufactured by ANT Neuro
Sourced in Netherlands
The ASAlab™ software is a data analysis tool designed for electroencephalography (EEG) and related neuroimaging techniques. It provides a comprehensive suite of tools for the acquisition, processing, and visualization of EEG data.
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Lab products found in correlation
3 protocols using asalab software
1
EEG Recording and TMS Stimulation
2
High-Density EEG Resting-State Protocol
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All participants underwent high density EEG resting-state recordings for a duration of 2 min and 30 s. Participants were seated throughout the recordings and instructed to remain as still as possible. EEG data were acquired using Wave guard caps (ANT Neuro, Netherlands) comprising 128 sintered Ag/AgCl electrodes placed according to the 10–5 positioning system (Oostenveld and Praamstra, 2001 (link)). Channel signals were recorded using ASA-Lab software (ANT Neuro, Netherlands) with a sampling frequency of 1024 Hz and electrode impedances of <5 kΩ. All electrodes were referenced to Fz and a ground electrode was attached to the clavicle. Continuous EEG data files were saved and stored for off-line processing. For the purposes of EEG analysis only 19 electrodes (on the basis of the 10–20 system) were utilised: Fp1, Fp2, F3, F4, F7, F8, Fz, T3, T4, T5, T6, C3, C4, Cz, P3, P4, Pz, O1, and O2 (Fig. 2 ).
3
Binocular 3D Visual Presentation and EEG Recording
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All stimuli were presented using a gamma corrected ViewPixx 3D display (VPixx technologies, Canada) driven by a Mac Pro. Binocular separation with minimal crosstalk was achieved by synchronizing the refresh rate of the display with the toggling of a pair of Nvidia stereo shutter goggles using an infra-red signal. Monitor refresh rate was set to 120Hz, meaning that each eye was updated at 60Hz (every 16.67 msec). Display resolution was set to 1920 X 1080 pixels. A single pixel subtended 0.027° of visual angle (1.63 arc min) when viewed from 57 cm. The mean luminance of the display viewed through the shutter goggles was 26 cd/m 2 . EEG signals were recorded from 64 electrodes distributed across the scalp according to the 10/20 EEG system (Chatrian et al., 1985) (link) in a WaveGuard cap (ANT Neuro, Netherlands). We monitored eye blinks with an electrooculogram, which consisted of bipolar electrodes placed above the eyebrow and atop of the cheek on the left side of the participant's face. Stimulus-contingent triggers were sent from the ViewPixx display to the amplifier using a parallel cable. Signals were amplified and digitized using a PC with the ASAlab software (ANT Neuro, Netherlands). All EEG data were imported into MATLAB (Mathworks, MA, USA) and analysed offline.
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