Comparison of quantitative EEG parameters from four different analysis techniques in evaluation of relationships between EEG and CBF in brain infarction

Tolonen, U.; Sulg, I

doi:10.1016/0013-4694(81)90007-9

Cited by 122 publications

(50 citation statements)

References 24 publications

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“…While the neuranatomical specificity of these effects are yet to be characterized in humans, PET and autoradiography studies in primates have both demonstrated similar cocaine effects in the prefrontal cortex (Porrino et al, 2002;Howell et al, 2002), consistent with the location of the qEEG effects observed in the present study. Prior studies comparing qEEG with cerebral blood flow have demonstrated a negative correlation between cortical cerebral blood flow and both delta (Tolonen and Sulg, 1981;Rodriguez et al, 1999) and theta (Mattia et al, 2003) power. In both the acute cocaine and qEEG studies, the measurements of cerebral blood flow were based on similar flow-sensitive inversion recovery functional MRI (Gollub et al, 1998;Mattia et al, 2003) and 99m Tc-HMPAO SPECT (Wallace et al, 1996;Rodriguez et al, 1999) recording techniques.…”

Section: Discussionmentioning

confidence: 93%

Topographic Imaging of Quantitative EEG in Response to Smoked Cocaine Self-Administration in Humans

Reid

Flammino

Howard

et al. 2005

Neuropsychopharmacol

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Quantitative electroencephalographic (qEEG) profiles were studied in cocaine-dependent patients in response to an acute, single-blind, self-administered dose of smoked cocaine base (50 mg) vs placebo. qEEG data were averaged using neurometric analytical methods and the spectral power of each primary bandwidth was computed and topographically imaged. Additional measures included cocaineinduced high, craving, and related subjective ratings, heart rate, blood pressure, and plasma cortisol and homovanillic acid levels. In all, 13 crack cocaine-dependent subjects were tested. Cocaine produced a rapid increase in subjective ratings of cocaine high and good drug effect, and a more persistent increase in cocaine craving and nervousness. Cocaine also produced a rapid rise in heart rate and a prolonged increase in plasma cortisol. Placebo, administered in the context of cocaine cues and dosing expectations, had no cocaine-like subjective or physiological effects. Cocaine produced a rapid increase in absolute theta, alpha, and beta power over the prefrontal cortex (FP1, FP2), lasting up to 25 min after dosing. The increase in theta power was correlated with good drug effect, and the increase in alpha power was correlated with nervousness. Cocaine also produced a similar increase in delta coherence over the prefrontal cortex, which was positively correlated with plasma cortisol, and negatively correlated with nervousness. Placebo resulted in an increase in alpha power over the prefrontal cortex. These data demonstrate the involvement of prefrontal cortex in the qEEG response to acute cocaine. Evidence indicates slow wave qEEG, delta and theta activity, involvement in the rewarding properties of cocaine.

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Section: Discussionmentioning

confidence: 93%

Topographic Imaging of Quantitative EEG in Response to Smoked Cocaine Self-Administration in Humans

Reid

Flammino

Howard

et al. 2005

Neuropsychopharmacol

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“…events in acute ischemic stroke, coherence performed only modestly well in this study, perhaps because of the background changes associated with SAH in general. Similarly, although spectral edge frequencies correlate with ischemia in acute ischemic stroke [28] and carotid endarterectomy [29] and mean frequency changes correlate with improvements in CBF [20], frequency measures were not predictive of delayed cerebral ischemia in poorgrade SAH, potentially because of lower overall frequencies at baseline. Th ese parameters have not been adequately studied in better grade SAH, and may still hold some promise.…”

Section: Eeg Changes In Subarachnoid Hemorrhagementioning

confidence: 98%

“…Parametric, mimetic, and spatiotemporal analyses are also available using a variety of computational methods that are beyond the scope of this review [27]. For now, fast Fourier transformation appears to be the most suitable for quantifying the EEG [28] but future algorithms may also incorporate ICU-specifi c EEG feature recognition and waveform analysis based on machine learning approaches trained on ICU EEG recordings.…”

Section: A Need For Quantitative Eegmentioning

confidence: 99%

“…Intra operative spectral edge frequencies, for example, detect ischemic changes in carotid endarterectomy patients receiving isofl urane anesthesia, whereas changes in the relative delta percentage (that is, delta power/total power) are accurate in patients receiving propofol [29]. In acute ischemic stroke, hemispheric relative delta percentage, spectral edge frequencies 25% and 75%, and the overall mean frequency correlated well with CBF [28]. Cerebral perfusion pressure (CPP), related to CBF and to ICP, correlates with decreases in mean frequency as CPP falls below 60 mmHg, even in comatose or sedated patients [30].…”

Section: Quantitative Eeg In Ischemiamentioning

confidence: 99%

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Quantitative EEG for the Detection of Brain Ischemia

Foreman¹,

Claassen²

2012

Annual Update in Intensive Care and Emergency Medicine 2012

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“…As frequências delta e alfa se correlacionam de forma negativa (delta) e positiva (alfa), tanto com o fluxo sanguíneo cerebral como com o CMRO2; as atividades teta e beta mostram correlação menor. Quando usados por especialistas em EEG, a sensibilidade e a especificidade destes testes podem ser altas para detecção de distúrbios cerebrais relacionados à isquemia 5,35,48,[90][91][92][93][94][95][96][97][98][99][100][101][102][103] . Os estudos têm mostrado sensibilidade geralmente maior do que 80% com boa especificidade, índices de falso-positivo abaixo de 5-10% e correlação de 0.7 entre EEG e fluxo sanguíneo em regiões isquêmicas e não isquêmicas.…”

Section: Isquemia Cerebral E Doenças Vasculares Cerebraisunclassified

Recomendações para o registro/interpretação do mapeamento topográfico do eletrencefalograma e potenciais evocados: Parte II: Correlações clínicas

Luccas¹,

Anghinah²,

Braga³

et al. 1999

Arq. Neuro-Psiquiatr.

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RESUMO -O EEG digital (DEEG) e o quantitativo (QEEG) representam métodos recém desenvolvidos na prática clínica que, além da utilidade didática e em pesquisa, também mostram importância clínica. As aplicações clínicas são enumeradas a seguir: 1. O DEEG representa um substituto estabelecido para o EEG convencional, pois acrescenta claros avanços técnicos. 2. Algumas técnicas do QEEG são consideradas estabelecidas para uso clínico como adjunto ao DEEG: 2a) detecção automática de possíveis descargas epileptiformes ou crises epilépticas em registros prolongados, facilitando o trabalho subsequente do especialista; 2b) monitoração contínua do EEG na sala cirúrgica ou na UTI, visando reduzir complicações. 3. Certas técnicas de QEEG são consideradas possíveis opções práticas como uma adição ao DEEG: 3a) análise topográfica e temporal de voltagens e dipolos de espículas na avaliação pré-cirúrgica de alguns tipos de epilepsia; 3b) análise de frequências em certos casos com doença cérebro-vascular, em quadros demenciais e em encefalopatias, principalmente quando outros testes, como os exames de imagem e o EEG convencional se mostrarem inconclusivos. 4. O QEEG permanece apenas como instrumento de pesquisa em doenças como síndrome pós-concussional, distúrbios do aprendizado, déficit de atenção, esquizofrenia, depressão, alcoolismo e dependência a drogas. O QEEG deve ser usado sempre em conjunto com o DEEG. Devido aos sérios riscos de erros de interpretação, é inaceitável o uso clínico do QEEG e de técnicas correlatas por médicos sem a adequada especialização em interpretação do EEG convencional e também nessas novas técnicas. PALAVRAS-CHAVE: EEG digital; EEG quantitativo; mapeamento cerebral do EEG; recomendações; epilepsia; doença cérebro-vascular; demências; encefalopatias. Guidelines for recording/analyzing quantitative EEG and evoked potentials: Part II. Clinical aspectsABSTRACT -Digital EEG (DEEG) and quantitative EEG (QEEG) are recently developed tools present in many clinical situations. Besides showing didactic and research utility, they may also have a clinical role. Although a considerable amount of scientific literature has been published related to QEEG, many controversies still subsist regarding its clinical utilization. Clinical applications are: 1. DEEG is already an established substitute for conventional EEG, representing a clear technical advance. 2. Certain QEEG techniques are an established addition to DEEG for: 2a) screening for epileptic spikes or seizures in long-term recordings; 2b) Operation room and intensive care unit EEG monitoring. 3. Certain QEEG techniques are considered possible useful additions to DEEG: 3a) topographic voltage and dipole analysis in epilepsy evaluations; 3b) frequency analysis in cerebrovascular disease and dementia, mostly when other tests have been inconclusive. 4. QEEG remains investigational for clinical use in postconcussion syndrome, learning disability, attention disorders, schizophrenia, depression, alcoholism and drug abuse. EEG brain mapping and other QEEG technique...

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Comparison of quantitative EEG parameters from four different analysis techniques in evaluation of relationships between EEG and CBF in brain infarction

Cited by 122 publications

References 24 publications

Topographic Imaging of Quantitative EEG in Response to Smoked Cocaine Self-Administration in Humans

Topographic Imaging of Quantitative EEG in Response to Smoked Cocaine Self-Administration in Humans

Quantitative EEG for the Detection of Brain Ischemia

Recomendações para o registro/interpretação do mapeamento topográfico do eletrencefalograma e potenciais evocados: Parte II: Correlações clínicas

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