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Related Concept Videos

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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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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.
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Association between the 2D:4D ratio and schizophrenia.

Yuanyuan Han1, Wei Deng1, Wei Lei1

  • 1The Mental Health Center, West China Hospital, Sichuan University, Chengdu, China.

The Journal of International Medical Research
|June 27, 2020
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Summary

The second digit to fourth digit ratio (2D:4D) is significantly higher in schizophrenia patients compared to healthy individuals. This finding suggests abnormal cerebral conditions may be linked to schizophrenia pathogenesis.

Keywords:
2D:4DMinor physical anomalydigit ratiopathogenesisschizophreniasurface feature

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Area of Science:

  • Neuroscience
  • Human Biology
  • Psychiatry

Background:

  • The second digit to fourth digit ratio (2D:4D) is a proposed marker of prenatal androgen exposure.
  • Digit ratio (2D:4D) has been investigated for its potential association with various neurological and psychiatric conditions.

Purpose of the Study:

  • To investigate the association between the 2D:4D ratio and schizophrenia.
  • To explore the 2D:4D ratio as a potential indicator of schizophrenia pathogenesis.

Main Methods:

  • A case-control study involving 843 schizophrenia patients and 1050 healthy controls.
  • Measurement of digit lengths of both hands and analysis of the 2D:4D ratio in all subjects.

Main Results:

  • The 2D:4D ratio was sexually dimorphic in healthy controls, with higher values in women.
  • Schizophrenia patients exhibited a significantly larger 2D:4D ratio compared to healthy controls.
  • The difference in 2D:4D ratios between male patients and controls was more pronounced than in females.

Conclusions:

  • Findings support the hypothesis of abnormal cerebral conditions in schizophrenia patients.
  • The 2D:4D ratio may serve as a potential biomarker for schizophrenia.