Electroencephalography

BrainAmp MR Plus EEG System

Our Brain Products BrainAmp MR Plus electroencephalography (EEG) comprises a 64-channel active EEG measuring system for EEG experiments and a similar 64-channel passive EEG measuring system for simultaneous EEG and fMRI measurements. Our EEG system is located at our Clayton site.

Benefits of using EEG

  • 64-channel active and passive EEG measuring systems can be used to record high quality EEG signals
  • The system can integrate EEG and ERP recordings during fMRI scanning, as well as non-fMRI EEG and ERP based recordings
  • Newly purchased ‘slim acti-caps’ have even better features compared to the previous model of active caps:
    • Three times thinner and lighter electrodes which are less susceptible to movement
    • Flat Ag/AgCl pellet and a low-profile electrode splitter box results in a much more robust system
    • Compatible to use with concurrent TMS measurements
  • The active caps allow for:
    • Easier adjustments of electrode impedances and give the user more control over their measurement accuracy thanks to the per-electrode LED impedance feedback
    • Recordings at higher impedances than traditional passive electrodes
  • Our EEG lab enables high-fidelity visual and auditory stimulus delivery synchronised to EEG recordings
  • The passive BrainAmp MR Plus system can record during the MRI pulse sequence without compromising the raw EEG data
  • Clock synchronisation between the MRI and EEG system improves the accuracy of gradient artefact reduction, simplifies the artefact reduction process, and allows acquisition using standard sampling rates
  • Using Brain Products 'multi-trodes' (MR-safe electrodes) with the BrainAmp ExG MR box, reliable EMG and ECG measurements can easily be performed inside or outside the scanner

Research applications

  • Cognitive Neuroscience
  • Neuropsychology
  • Clinical Psychology

BrainAmp MR Plus technical specifications

  • BrainAmp MR plus amplifiers: Two 32-channel MR-safe amplifiers, suitable for EEG studies, simultaneous EEG/fMRI acquisitions, EEG/TMS co-registrations, and EEG/ERP studies
  • BrainAmp ExG MR 16-channel amplifier: 8 bipolar + 8 AUX (to connect to sensors, such as respiration belt), suitable for EEG studies and simultaneous EEG/fMRI acquisitions
  • Sampling rate of 5kHz per channel
  • Optical signal transmission (via twin fiber optics)
  • Rechargeable battery (PowerPack)
  • 16bit TTL trigger input

Compatible equipment

  • Skyra 3 Tesla Magnetic Resonance Imaging (MRI) scanner
  • Transcranial Magnetic Stimulation (TMS)
  • SR Research EyeLink 1000 System
  • Various sensors:
    • Respiration belt
    • Galvanic skin response (GSR)
    • EOG electrodes
    • Multitrodes for EMG and ECG measurements

Additional support

Our Clinical Support Team can provide valuable guidance (computer software and hardware troubleshooting and installation, equipment troubleshooting, training, and neurobehavioural computer task programming)and our Administration team can help you navigate the relevant procedures.

Research using EEG

Monash University researchers have used MBI’s EEG facilities to investigate how attention is focused and diverted, and how attention interacts with what we consciously perceive.

Even when we focus our attention on a single object, we experience periods of high and low focus that alternate many times per second. These rapid changes in attention – known as attentional sampling – are imperceptible to us, but allow our brains to capture information about the surrounding scene and enhance it for analysis. Read more about this research.