Surface electromyography (EMG) was recorded from the muscle belly of the ECR and FDI muscles with bipolar Ag/AgCl electrodes (Neuroline 720, Ambu® A/S, DK) placed with an approximate 20 mm interelectrode distance. The reference electrodes were placed at the styloideus processus (FDI) or the olecranon (ECR), both of the ulna. The EMG data were sampled at 4 kHz, preamplified (1000x gain), and analogue bandpass filtered at 5 Hz–1 kHz. EMG data were digitized by a 16-bit data acquisition card (National Instruments, NI6122; voltage: 10 V), and peak-to-peak TMS-MEPs were shown online by custom-made LabVIEW software (Mr. Kick III, SMI, Aalborg University).
Ni6122
Manufactured by National Instruments
Sourced in United States
The NI6122 is a data acquisition (DAQ) device from National Instruments. It features 16-bit analog-to-digital conversion and can sample up to 1 million samples per second. The device provides multiple analog input channels for data collection and measurement applications.
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Lab products found in correlation
2 protocols using ni6122
1
Surface EMG Recording for TMS-MEPs
2
EMG Acquisition and Preprocessing Protocol
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Electromyographic (EMG) activity was recorded from the muscle belly of the right First Dorsal Interosseus (FDI) using silver/silver chloride surface electrodes (Neuroline 720-01-K, Ambu® A/S). The EMG signals were sampled at 4 kHz, pre-amplified (1000 × gain), and bandpass filtered between 5 Hz and 2 kHz. The data were digitized by a 16-bit data acquisition card (National Instruments, NI6122) and saved using custom-made Labview software (Mr. Kick, Knud Larsen, SMI, Aalborg University).
EMG activity was preprocessed offline using Matlab (The Math-Works, Natick, USA). First, the TMS stimulation artefact was removed and the voltage difference at the extremities of the segments was corrected before being merged. The resulting signal was bandpass filtered between 5 and 1000 Hz and notch filtered using a 2nd-order Butterworth filter.
EMG activity was preprocessed offline using Matlab (The Math-Works, Natick, USA). First, the TMS stimulation artefact was removed and the voltage difference at the extremities of the segments was corrected before being merged. The resulting signal was bandpass filtered between 5 and 1000 Hz and notch filtered using a 2nd-order Butterworth filter.
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