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Accelerated DMN-Targeted cTBS Improves Processing Speed Deficits in Schizophrenia.

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Summary
This summary is machine-generated.

Transcranial magnetic stimulation (TMS) targeting the Default Mode Network (DMN) improved processing speed in schizophrenia patients. Reduced DMN connectivity correlated with cognitive gains, particularly in younger individuals.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Science

Background:

  • Schizophrenia is characterized by significant cognitive deficits, impacting daily functioning.
  • Impaired information processing speed is a core cognitive deficit in schizophrenia.
  • The neural underpinnings of these deficits, particularly Default Mode Network (DMN) hyperconnectivity, are being investigated.

Purpose of the Study:

  • To investigate if transcranial magnetic stimulation (TMS) targeting the DMN can improve processing speed in individuals with schizophrenia.
  • To explore the relationship between DMN connectivity modulation and processing speed improvements.
  • To assess the impact of age on treatment response.

Main Methods:

  • Two studies were conducted: single-session TMS (iTBS, cTBS, sham) and multi-session accelerated cTBS.
  • Participants included individuals with schizophrenia and non-psychosis controls.
  • Resting-state neuroimaging and processing speed assessments (digit symbol coding) were performed before and after TMS interventions.

Main Results:

  • Multi-session DMN-targeted cTBS significantly improved processing speed in the schizophrenia group (p=0.0124).
  • A reduction in DMN connectivity was associated with enhanced processing speed in individuals with schizophrenia (p=0.021).
  • Younger participants showed greater processing speed improvements compared to older participants (p=0.006).

Conclusions:

  • Personalized, network-targeted TMS offers a novel therapeutic approach for cognitive impairment in schizophrenia.
  • Modulating DMN connectivity via TMS shows promise for treating processing speed deficits.
  • Age is a significant factor influencing the efficacy of DMN-targeted TMS for cognitive enhancement.