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The Quantitative Electroencephalogram and the Use of Normative Databases

STS Instructor Authored by Thomas Collura

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Check out this Knowledge Base article from StressTherapy Solutions: The Quantitative Electroencephalogram and the Use of Normative Databases.

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Study at a glance

Area
QEEG, Methods & Mechanisms
Study type
Review & meta-analysis
Authors
Collura TF
Journal
Biofeedback
Year
2019
Protocol
QEEG with normative z-scores; LORETA

Key findings

  • Normative databases give a common yardstick, particularly valuable for connectivity metrics
  • Argues that hovering around z = 0 over time reflects a flexible, adaptable and ready brain
  • Describes how LORETA inverse-solution methods fit within QEEG and normative comparison
  • Discusses both advantages and shortcomings of the normative approach

DOI 10.5298/1081-5937-47.1.01 →

An overview of the scientific, technical and clinical reasons for using quantitative EEG to assess clients and to track their progress during treatment. It focuses on normative databases and z-scores as a standard way of comparing a client's EEG with a reference group, both for reports and for training, and notes they are especially useful for connectivity measures. The article also covers LORETA source-localisation methods within the normative framework and weighs strengths against limitations.