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High Density EEG

Electrical Geodesics, Inc (EGI) High Density EEG

Electrical Geodesics, Inc (EGI) High Density EEG

The EGI GES 400 series includes the capability for 128 channel infant EEG or 256 channel adult EEG. Geodesic EEG electrodes are evenly spaced over the entire scalp, cheeks and back of the neck, allowing for dense and even sampling at a high spatial resolution. The system includes infant sensor nets that allow for longitudinal studies the first year of life and adult sensor nets. The system is expandable to MRI-compatibility. This system also interfaces with E-prime and Presentation software for evoked and event-related potentials. The system includes Net Station software that provides full acquisition, review and analysis functions with GeoSource source estimation software. The current system is capable of EEG-MEG simultaneous recordings. Data can be processed using Net Station or third party software.

Facilities

  • High density EEG
    • 128 channel infant nets (1 month and up)

    • 256 channel adult nets
      person in foreground wearing EEG adult net while scientist in background monitors
  • Physiological measurements
    • Respiration (temperature, flow), body position, EMG, ECG, SpO2(oxygen saturation)

Features

  • Measure neurophysiological activity with high-density sensor nets
  • High temporal resolution
  • Portable
  • Low cost
  • Noninvasive

Research supports

  • Study Design, Data Collection, Analysis, Interpretation
  • Paper Writing, Presentation, Publication
  • Grant Applications
  • Imaging, Technical, and Statistical Software
  • Data Storage and Management

Research projects

  • Exercise effect in stroke patients’ recovery
  • EEG power spectrum under increased postural task difficulty
  • ERP in tinnitus/concussion patients
  • Effects of Transcranial Direct Current Stimulation (tDCS) in Prader–Willi Syndrome patients
  • Neurofeedback training in children with migraine
  • Prenatal docosahexaenoic acid effect on fetal neurodevelopment
  • Cortical dynamics of automated driving in old people
  • Brain responses to hyperpalatable food cues
  • Relationship between added sugars intake and children brain development.

Analysis approaches

  • Event related potential (ERP) analysis: brain response of a specific sensory, cognitive, or motor event.
    EEG Event related potential (ERP) analysis graphs - 4
  • Microstate analysis: neural dynamics across time.

  • EEG microstate analysis graphs
  • Functional connectivity: correlation and functional coordination between different brain areas

  • EEG functional connectivity graphs
  • Power spectrum analysis: frequency content or the distribution of EEG signal power over frequency.

  • EEG power spectrum analysis
  • Source imaging: location of active sources in the brain

  • EEG source imaging graphs
  • Electromyography (EMG): the electrical activity of muscles and nerves.
  • Electrocardiogram (ECG): the electrical activity of the heartbeat.
  • Multivariate pattern analysis (MVPA): discriminate neural representations associated with stimuli, experimental condition, or participant’s phenotype.

Unit Contacts

Neurophysiology (HD-EEG)

Laura Martin, Ph.D.
Director, Cognitive Neuroscience Unit
Associate Director, Hoglund Biomedical Imaging Center

Ke Liao, Ph.D.
Senior Scientist

Vlad Papa, B.A.
Senior Research Associate/Human Imaging Core Manager

Hoglund Biomedical Imaging Center

HBIC Front Desk
913-588-9070