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Related Concept Videos

Lateralization01:28

Lateralization

Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
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Schizophrenia, a complex psychiatric disorder, has been historically misunderstood. Early psychological theories attributed its origins to childhood trauma and unresponsive parenting. However, contemporary research largely rejects these notions, favoring the vulnerability-stress hypothesis. This model proposes that individuals with a genetic predisposition to schizophrenia may develop the disorder following exposure to significant environmental stressors. Notably, studies on high-risk...

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Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
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Cerebral laterality in schizophrenia.

R K Gaur1, V K Bhat

  • 1Senior Resident, Department of Psychiatry, Institute of Medical Sciences, Banaras Hindu University, Varanasi - 221 005, India.

Indian Journal of Psychiatry
|September 20, 2011
PubMed
Summary
This summary is machine-generated.

Electroencephalography (EEG) in 35 schizophrenia patients revealed abnormalities in 43%. Left hemisphere laterality was more common, with temporal lobe involvement most frequent in abnormal EEG patterns.

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Area of Science:

  • Neuroscience
  • Clinical Neurology
  • Psychiatry

Background:

  • Schizophrenia is a complex mental disorder with suspected neurological underpinnings.
  • Electroencephalography (EEG) is a non-invasive tool used to study brain electrical activity.
  • Previous studies suggest potential EEG abnormalities in schizophrenia patients.

Purpose of the Study:

  • To investigate the electroencephalographic (EEG) patterns in drug-free patients with schizophrenia.
  • To identify the prevalence and characteristics of EEG abnormalities, including laterality and cortical involvement.

Main Methods:

  • Electroencephalography (EEG) recordings were obtained from 35 drug-free patients diagnosed with schizophrenia.
  • EEG data were analyzed for abnormalities, laterality (left vs. right hemisphere), and specific cortical locations.
  • Statistical analysis was performed to determine the significance of findings.

Main Results:

  • Abnormal EEG records were observed in 15 out of 35 patients (42.86%).
  • Of the abnormal records, 9 showed evidence of laterality, with a predominance of left hemisphere involvement (7 cases) compared to the right hemisphere (2 cases).
  • The temporal lobe was identified as the most frequently affected cortical area in patients with abnormal EEG findings.

Conclusions:

  • EEG abnormalities are prevalent in drug-free schizophrenia patients.
  • Left-sided hemispheric and temporal lobe abnormalities are common findings in the EEG of schizophrenia patients.
  • EEG may serve as a valuable tool for characterizing neurological correlates of schizophrenia.