Electroencephalography (EEG): Inverse Problems

He, Bin; Hori, Jun‐ichi; Babiloni, Fabio

doi:10.1002/9780471740360.ebs0655

Cited by 5 publications

(1 citation statement)

References 67 publications

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“…The development of recording and analysis techniques has substantially increased the quality of the EEG recording, such as an advanced technique, named highresolution EEG (HREEG) [6][7][8]. The aim of HREEG is to provide standard and tested algorithms that help the experimenter to infer the nature of cerebral activity from the measured scalp potentials, which is introduced when ionic currents cross low conductivity structures (i.e., the skull).…”

Section: Introductionmentioning

confidence: 99%

The low frequency electromagnetic field on the rat EEG

Sallam¹

2012

JBPC

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The aim of the present study was to find out the effects of low frequency electromagnetic field (EMF) 50 Hz -10 mT on the rat electroencephalogram (EEG) recorded from the rat brain cortex and from the skull surface. The rats were, whole body, exposed to this EMF intensity one hour daily for 7 days. Recovery study was done after one week from stopping the EMF exposure. The effects of the filed were estimated by compression of the averaged EEG frequency spectra in the range of frequencies between 0.2 -0.7 Hz and by comparison of amplitude of EEG waves in control, exposed to EMF and recovery animals. Statistically significant effects of EMF were observed both in EEG amplitude and power reduction at most EEG frequencies. Also, noticeable variations were observed in normal values of maximum amplitude and number of successive EEG epochs recorded from brain and skull surfaces after exposure to ELF magnetic fields. These results show that a weak low EMF can influence the spontaneous electrical rat brain activity in the animals subjected to the EMF.

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Section: Introductionmentioning

confidence: 99%

The low frequency electromagnetic field on the rat EEG

Sallam¹

2012

JBPC

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Neurophysiological Signals Processing

Borghini

Aricò

Flumeri

et al. 2017

Biosystems &Amp; Biorobotics

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Changes in Brain Activity During the Observation of TV Commercials by Using EEG, GSR and HR Measurements

et al. 2009

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In this study we were interested to analyse the brain activity occurring during the "naturalistic" observation of commercial ads intermingled in a random order within a documentary. In order to measure both the brain activity and the emotional engage of the 15 healthy subjects investigated, we used simultaneous EEG, Galvanic Skin Response (GSR), Heart Rate (HR) recordings during the whole experiment. We would like to link significant variation of EEG, GSR, HR and Heart Rate Variability (HRV) measurements with the memory and pleasantness of the stimuli presented, as resulted successively from the subject's verbal interview. In order to do that, different indexes were employed to summarize the cerebral and autonomic measurements performed. Such indexes were used in the statistical analysis, performed with the use of Analysis of Variance (ANOVA) and z-score transformation of the estimated cortical activity by solving the associated EEG inverse problem. The results are summarized as follows: (1) in the population analyzed, the cortical activity in the theta band elicited during the observation of the TV commercials that were remembered is higher and localized in the left frontal brain areas when compared to the activity elicited during the vision of the TV commercials that were forgotten (p< 0.048). Same increase in the theta activity occurred during the observation of commercials that were judgment pleasant when compared with the other (p < 0.042). Differences in cortical activity were also observed for the gamma activity, bilaterally in frontal and prefrontal areas. (2) the HR and HRV activity elicited during the observation of the TV commercials that were remembered or judged pleasant is higher than the same activity during the observation of commercials that will be forgotten (p < 0.001 and p < 0.048, respectively for HR and HRV) or were judged unpleasant (p < 0.042 and p < 0.04, respectively for HR and HRV). No statistical differences between the level of the GSR values were observed across the experimental conditions. In conclusion, the TV commercials proposed to the population analyzed have increased the HR values and the cerebral activity mainly in the theta band in the left hemisphere when they will be memorized and judged pleasant. Further research with an extended set of subjects will be necessary to further validate the observations reported in this paper. However, these conclusions seems reasonable and well inserted in the already existing literature on this topic related to the HERA model.

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Electroencephalography (EEG): Inverse Problems

Abstract: In this chapter, we review the principles and state‐of‐the‐art of EEG inverse problems and source imaging. Both the basics and the concepts of the inverse problem and the latest development in EEG inverse are covered.

Cited by 5 publications

References 67 publications

The low frequency electromagnetic field on the rat EEG

The low frequency electromagnetic field on the rat EEG

Neurophysiological Signals Processing

Changes in Brain Activity During the Observation of TV Commercials by Using EEG, GSR and HR Measurements

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