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Related Concept Videos

Biological Causes of Schizophrenia01:29

Biological Causes of Schizophrenia

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Schizophrenia, a severe psychiatric disorder, arises from a complex interplay of biological factors, including genetic predisposition, structural brain abnormalities, neurotransmitter dysregulation, and developmental irregularities. These factors collectively contribute to the onset and progression of the disorder, which typically manifests in late adolescence or early adulthood.
Genetic Factors in Schizophrenia
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Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
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Schizophrenia is a complex mental health disorder that can manifest with various positive symptoms, including thought, movement, and behavior disorders. These symptoms significantly disrupt cognitive and motor functions, leading to profound effects on an individual's ability to engage with the world.
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Psychological and Sociocultural Causes of Schizophrenia01:29

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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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Negative symptoms of schizophrenia indicate a reduction or absence of typical behaviors and emotional responses found in healthy individuals, while positive symptoms reflect an excess or distortion of normal functioning.
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Schizophrenia01:17

Schizophrenia

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Schizophrenia, a term introduced by Swiss psychiatrist Eugen Bleuler in 1911, describes a severe psychological disorder marked by profound disruptions in attention, thought processes, language, emotion, and interpersonal relationships. The core feature of schizophrenia is psychosis — a state characterized by a fundamental detachment from reality. This disconnection manifests through distorted logic, impaired perception, and atypical behavior, severely affecting the lives of those...
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Frontal-posterior functional imbalance and aberrant function developmental patterns in schizophrenia.

Dandan Sun1,2, Huiling Guo2,3, Fay Y Womer4

  • 1Department of Cardiovascular Ultrasound, The People's Hospital of China Medical University & The People's Hospital of Liaoning Province, Shenyang, China.

Translational Psychiatry
|September 28, 2021
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Summary
This summary is machine-generated.

Schizophrenia (SZ) involves altered brain function, with frontal areas showing increased activity and posterior areas decreased activity. Adolescence is a key developmental period for these changes, particularly in the visual cortex.

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Area of Science:

  • Neuroscience
  • Developmental Neuroscience
  • Psychiatry

Background:

  • Schizophrenia (SZ) is a neurodevelopmental disorder with incomplete understanding of its developmental trajectory.
  • Identifying critical timing, brain regions, and mechanisms of SZ brain alterations is crucial.

Purpose of the Study:

  • To clarify developmental functional changes in SZ.
  • To identify specific timing, brain regions, and mechanisms of brain alterations during SZ development.

Main Methods:

  • Cross-sectional analysis of regional homogeneity (ReHo) in humans with SZ (hSZ) and healthy controls (HC).
  • Longitudinal analysis of ReHo in methylazoxymethanol acetate (MAM) rats (SZ model) and vehicle rats from adolescence to adulthood.
  • Metabolomic and proteomic profiling in adult MAM and vehicle rats.

Main Results:

  • hSZ and adult MAM rats showed similar ReHo alterations: increased frontal and decreased posterior activity.
  • Longitudinal MAM rat data revealed decreased posterior ReHo in adolescence and altered frontal/posterior ReHo in adulthood.
  • Metabolic and proteomic data suggested central carbon metabolism disturbance and mitochondrial dysfunction in MAM rats.

Conclusions:

  • SZ exhibits frontal-posterior functional imbalance and aberrant developmental patterns.
  • The adolescent visual cortex is identified as a critical locus and sensitive window in SZ development.
  • Findings offer translational potential for developing effective SZ therapies.