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Evoked-Potential Correlates of Stimulus Uncertainty
The average evoked-potential waveforms to sound and light stimuli recorded from scalp in awake human subjects show differences as a function of the subject's degree of uncertainty with respect to the…
Assessing interactions in the brain with exact low-resolution electromagnetic tomography
- R. Pascual-Marqui, D. Lehmann, T. Kinoshita
- BiologyPhilosophical Transactions of the Royal Society A…
- 13 October 2011
A solution to this inverse problem that attains exact localization: exact low-resolution brain electromagnetic tomography (eLORETA) is reported, which yields high time-resolution intracranial signals that can be used for assessing functional dynamic connectivity in the brain.
Millisecond by Millisecond, Year by Year: Normative EEG Microstates and Developmental Stages
Most studies of continuous EEG data have used frequency transformation, which allows the quantification of brain states that vary over seconds. For the analysis of shorter, transient EEG events, it…
Decreased EEG synchronization in Alzheimer’s disease and mild cognitive impairment
Conventional and quantitative electroencephalography in psychiatry.
New three-dimensional QEEG imaging methods offer an economical alternative to other functional brain imaging modalities and are distinctive within a wide variety of disorders and often contributing to differential diagnosis and selection of treatment.
The neurophysics of consciousness
- E. John
- BiologyBrain Research Reviews
- 1 June 2002
The Anesthetic Cascade: A Theory of How Anesthesia Suppresses Consciousness
It is shown that for many anesthetic agents, the dose required to suppress consciousness exceeds the amnestic dose but is substantially less then that required for surgical immobility during noxious stimuli, suggesting that these three dimensions may be mediated by different regions of the central nervous system.
Invariant Reversible QEEG Effects of Anesthetics
A common set of neuroanatomical regions appeared to be the locus of the most probable generators of the observed EEG changes, with prefrontal and frontal regions of each hemisphere becoming more closely coupled and anterior and posterior regions on each hemisphere, as well as homologous regions between the two hemispheres, uncoupling.
Quantitative EEG changes associated with loss and return of consciousness in healthy adult volunteers anaesthetized with propofol or sevoflurane.
- L. Gugino, R. Chabot, L. Prichep, E. John, V. Formanek, L. Aglio
- Biology, MedicineBritish journal of anaesthesia
- 1 September 2001
Alterations in the level of arousal were accompanied by significant QEEG changes, many of which were consistent across anaesthetic protocols, and frontal power predominance increased with deeper sedation, involving alpha and, to a lesser extent, delta and theta power.
3D Statistical Parametric Mapping of EEG Source Spectra by Means of Variable Resolution Electromagnetic Tomography (VARETA)
A new method for 3D QEEG tomography in the frequency domain using a variant of Statistical Parametric Mapping is presented for source log spectra and the statistical issues involved are addressed by the use of extreme value statistics.