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qEEG and Neurofeedbackin Mild Traumatic Brain Injury
Derek Jones PhD MBA Anatomical Concepts (UK) LtdFixxl Ltd
Can we distinguish brain injured from ‘normals’ based on their qEEG?
Can we use neurofeedback to improve
function?
mTBI
… Not Just About Sport …•Initial damage may seem minimal .. but …
•Chronic effects in the longer term
•Significant cognitive, sensory and psychiatric dysfunction
EEGBioelectric potential
recorded at the surface of the head using electrodes
and instrumentation.
Arising from the brain cells in the cerebral cortex
epiphenomenon
EEG Signal Acquisition
•80 year + Experience •Good hardware •Care needs to be taken
qEEG =
Quantitative Electroencephalography
•Frequency domain representation •Normative databases •Coherence
Data Acquisition
• Microvolt level signals • Sensitive to error & protocols • Standardised electrode positions
https://www.biofeedback-tech.com
moment-to-moment brain function is directly linked to
EEG oscillations.
Trauma should be reflected in the EEG pattern but needs to be quantified - you can’t do this
subjectively
Frequency SpectrumRepresenting the EEG
as consisting of several “classical” frequency bands
Delta - 0 to 4 Hz Theta - 4 to 7 Hz Alpha - 8 to 13 Hz Beta1 - 15 to 21 Hz Beta2 - 21 to 30 Hz Gamma - 30 to 100 Hz
SMR 12-15 Hz
Frequency Domain
Classify..Group A
Group CGroup B
“mTBI”
“normal”
Coherence
• Coherence (correlation) between regions tends to be high due to high level of connectedness
• Connectivity reflects the amount of processing that the brain is devoting to particular activities
• Could look at magnitude and phase of FFT
Human ConnectomeMapping Structure and Function
A wiring diagram of the brain
Normative Database
individual
Identify mTBIKirtley Thornton “A QEEG activation methodology that obtained 100% accuracy in the discrimination of traumatic brain injured from normal and does the learning disabled show the brain injury pattern?”.Neuroregulation, Vol. 1(3-4):209-218, 2014
10-20
Neurofeedback• Signals from the brain are “revealed” to the trainee
• Brain processes new information and learns
• Allows conditioning and signage to occur
• System needs to be intuitive and relatively simple
• There is engagement - but not “trying”
• EEG changes may occur but what matters is clinical outcomes
Conceptual view of Neurofeedback
EEG
Brain Events
Behaviour
Thought
Externalised
Internalised
Perceived as ThoughtsPerceived as Behaviour
Perceived as Neurofeedback
Derek Jones PhD MBA Anatomical Concepts (UK) LtdFixxl Ltd