Electroencephalographic findings in functional psychoses: State or trait indicators?

Sengoku, Akira; Takagi, Shunsuke

doi:10.1046/j.1440-1819.1998.00414.x

Cited by 27 publications

(5 citation statements)

References 62 publications

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“…Historically, a number of EEG studies of schizophrenic patients have found increased frontal lobe delta band activity (Buchsbaum and Haier, 1987; Sengoku and Takagi, 1998; Hughes and John, 1999). However, this was not a notable finding of the MEG studies reviewed here (see Table 1a).…”

Section: Discussionmentioning

confidence: 99%

“…Because EEG studies of schizophrenics have been reviewed elsewhere (Buchsbaum and Haier, 1987; Sengoku and Takagi, 1998; Hughes and John, 1999), they are not included in detailed manner below. However, in the Discussion section, both our MEG findings and the EEG literature on brain oscillations in schizophrenia are examined.…”

Section: Review Of the Current Literaturementioning

confidence: 99%

“…Neurophysiologic abnormalities have also been investigated: since its inception in the 1920’s, EEG has been used in an attempt to diagnose schizophrenia and understand its pathophysiology (Torrey, 2002). Indeed, a number of reviews of this literature have been published (Buchsbaum and Haier, 1987; Sengoku and Takagi, 1998; Hughes and John, 1999). As revealed by these reviews, an abnormality commonly found in schizophrenic patients is increased delta activity in the frontal lobes (e.g., Morihisa et al, 1983; Morstyn et al, 1983; Morihisa and McAnulty, 1985).…”

Section: Introductionmentioning

confidence: 99%

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Patterns of Spontaneous Magnetoencephalographic Activity in Patients With Schizophrenia

Siekmeier¹,

Stufflebeam²

2010

Journal of Clinical Neurophysiology

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Magnetoencephalography (MEG) non-invasively measures the magnetic fields produced by the brain. Pertinent research articles from 1993 to 2009 that measured spontaneous, whole-head MEG activity in schizophrenic patients were reviewed. Data on localization of oscillatory activity and correlation of these findings with psychotic symptoms are summarized. While the variety of measures used by different research groups makes a quantitative meta-analysis difficult, it appears that MEG activity in patients may exhibit identifiable patterns, defined by topographic organization and frequency band. Specifically, 11 of the 12 studies showed increased theta (4–8 Hz) and delta (1–4 Hz) band oscillations in the temporal lobes of patients; of the 10 studies that examined the relationship between oscillatory activity and symptomatology, 8 found a positive correlation between temporal lobe theta activity and positive schizophrenic symptoms. Abnormally high frontal delta activity was not seen. These findings are analyzed in comparison to the EEG literature on schizophrenics, and possible confounds (e.g., medication effects) are discussed. In the future, MEG might be used to assist in diagnosis, or might be fruitfully used in conjunction with new neuroscience research approaches such as computational modeling, which may be able to link oscillatory activity and cellular-level pathology.

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Section: Discussionmentioning

confidence: 99%

Section: Review Of the Current Literaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Patterns of Spontaneous Magnetoencephalographic Activity in Patients With Schizophrenia

Siekmeier¹,

Stufflebeam²

2010

Journal of Clinical Neurophysiology

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“…Brain activity recorded by EEG produces waves with various frequencies indicating real-time conditions in the brain. Delta waves in the relaxed forebrain are known to represent a decrease in brain activity (Sengoku & Takagi, 1998). Based on the observation, there was delta wave dominance in the prefrontal cortex of teens addicted to pornography.…”

Section: Discussionmentioning

confidence: 98%

QEEG-based Brain Mapping of Internet Pornography Addicted Adolescents

Amilah¹,

Anisa²,

Sulaeman³

et al. 2021

jhms

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The Indonesian government for many years has tried to protect the public from the dangers of pornography by blocking various sites. Although various efforts have been made to block access to pornography, a report from the Ministry of Women's Empowerment and Child Protection mentioned that 97% of Indonesian teens were exposed to pornography from the internet. In order to increase awareness, especially in the addiction phase, scientific evidences showing the bad effects of pornography addiction is needed. In this study, 15 teens addicted to internet pornography underwent brain mapping using electroencephalography (EEG) in a resting state for approximately 20 minutes. The data were processed using a quantitative EEG (QEEG) approach, especially Fast Fourrier Transform (FFT) by first removing all artifacts on the electroencephalogram during recording. The analysis focused on the delta wave in the forebrain, showing the dominance of the prefrontal cortex, which has implications for cognitive function decline, especially the braking system among these teens addicted to internet pornography. The decline in cognitive function causes teens to lose the ability to determine what is right and wrong or refrain from doing wrong. Based on the results, efforts to educate teens about the dangers of pornography addiction need to be further promoted.

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“…But slowing of EEG with delta waves has been described in the psychiatric patients. [15,16] It is known that benzodiazepines cause marked increase in beta-activity on the electroencephalogram. [17] This increased beta-activity in the frontal region could have been reflected as the lower BIS values (light sedation).…”

Section: Discussionmentioning

confidence: 99%

Lower Bispectral index values in psychiatric patients: A prospective, observational study

Ramesh

Radhakrishnan

Thimmaiah

et al. 2014

Journal of Neuroanaesthesiology and Critical Care

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Background: Bispectral index score (BIS) is a processed electroencephalographic parameter used to measure level of sedation in anaesthetised patients. In few studies of psychiatric patients undergoing electroconvulsive therapy (ECT), it was observed that the BIS values were lower at baseline. It is not clear from those studies whether the BIS values are really low. Also, it is not clear whether the lower values are related to the primary psychiatric illness or the due to the effect of ECT. Therefore, we studied the BIS values in psychiatric illnesses and compared them with the normal controls. Materials and Methods: BIS index was recorded in 237 patients with various psychiatric illness (Group P) and 40 control patients without any psychiatric illness undergoing spinal surgery (Group C). BIS values were recorded in supine position before breakfast and before the morning doses of antipsychotic/benzodiazepine medications. It was recorded during resting state in all the subjects. Results: BIS values were lower in group P compared to control group (a mean of 89.8 ± 7.8 vs 95.7 ± 2.4, P < 0.0001). In the group P, the patients with psychosis and bipolar disorder had significantly lower BIS values than the patients with depression ( P= 0.04). Conclusions: BIS values in psychiatric patients are lower than those in the control group. Psychotic and bipolar disorders are associated with significantly lower BIS values than the depression.

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Electroencephalographic findings in functional psychoses: State or trait indicators?

Cited by 27 publications

References 62 publications

Patterns of Spontaneous Magnetoencephalographic Activity in Patients With Schizophrenia

Patterns of Spontaneous Magnetoencephalographic Activity in Patients With Schizophrenia

QEEG-based Brain Mapping of Internet Pornography Addicted Adolescents

Lower Bispectral index values in psychiatric patients: A prospective, observational study

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