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Metaphor Comprehension in Schizophrenic Patients.

Ileana Rossetti1, Paolo Brambilla2,3, Costanza Papagno1,4

  • 1Dipartimento di Psicologia, Università di Milano-Bicocca, Milan, Italy.

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|June 6, 2018
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Summary

People with schizophrenia struggle with understanding metaphors, often favoring literal meanings. This review explores the neurocognitive and neuroanatomical reasons behind this difficulty, linking it to formal thought disorder.

Keywords:
concretismfigurativefirst episode psychosismetaphorpsychosisschizophrenia

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Area of Science:

  • Neuropsychology
  • Psycholinguistics
  • Cognitive Neuroscience

Background:

  • Schizophrenia patients often struggle with figurative language, a symptom of formal thought disorder.
  • This difficulty, termed concretism, involves a preference for literal interpretations over figurative ones.
  • Metaphor comprehension is particularly affected, with varying impacts based on metaphor type (conventional vs. novel).

Purpose of the Study:

  • To review the neurocognitive and neuroanatomical basis of metaphor misinterpretation in schizophrenia.
  • To identify specific cognitive deficits contributing to impaired metaphor comprehension.
  • To explore the neural correlates associated with these deficits in schizophrenia.

Main Methods:

  • Review of existing neuropsychological and neuroimaging studies on metaphor comprehension in schizophrenia.
  • Analysis of cognitive impairments (e.g., executive functions, theory of mind) linked to metaphor processing.
  • Examination of neuroanatomical findings in schizophrenia patients during metaphor comprehension tasks.

Main Results:

  • Schizophrenia is associated with difficulties in understanding metaphors, leading to literal interpretations.
  • Neurocognitive deficits, including impaired executive functions and theory of mind, contribute to this difficulty.
  • Neural correlates of metaphor comprehension deficits in schizophrenia involve frontal and temporal lobe regions affected by the disorder.

Conclusions:

  • The misinterpretation of metaphors in schizophrenia is linked to specific neurocognitive impairments.
  • Deficits in frontal and temporal brain regions are implicated in the neuropathology underlying these comprehension difficulties.
  • Further research is needed to elucidate the precise causal mechanisms of metaphor comprehension deficits in schizophrenia.