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Related Experiment Video

Updated: Sep 18, 2025

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Resting-state connectivity and task-based cortical response in post-stroke executive dysfunction: A fNIRS study.

Kayee Chong1,2, Songmei Chen3, Xixi Chen2,4

  • 1Body & Soul Medical Clinics, Shanghai, China.

Neuroimage. Reports
|June 26, 2025
PubMed
Summary
This summary is machine-generated.

Post-stroke executive dysfunction (PSED) patients show altered brain connectivity. Functional near-infrared spectroscopy (fNIRS) revealed compensatory hyperconnectivity during the Stroop task and maladaptive hypoconnectivity during the 1-back task, impacting executive function (EF).

Keywords:
Cortical activationFunctional connectivityFunctional near-infrared spectroscopy (fNIRS)Neural reorganizationPost-stroke executive dysfunction (PSED)

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Area of Science:

  • Neuroscience
  • Cognitive Neurology

Background:

  • Executive dysfunction is common after stroke, impacting daily life.
  • Understanding the neural reorganization of executive function (EF) in post-stroke executive dysfunction (PSED) is crucial for effective rehabilitation.

Purpose of the Study:

  • To investigate frontoparietal cortical reorganization in PSED patients using functional near-infrared spectroscopy (fNIRS).
  • To analyze resting-state and task-based functional connectivity (FC) during Stroop and 1-back tasks.

Main Methods:

  • fNIRS recorded hemodynamic responses from key brain regions in 20 PSED patients and 20 healthy controls (HCs).
  • Group differences in cortical activation and FC during resting-state, Stroop, and 1-back tasks were compared.
  • Correlations between cognitive scores (MoCA), task performance, and neural responses were analyzed.

Main Results:

  • PSED patients exhibited reduced activation in executive-related regions.
  • Stroop task: Compensatory cross-hemispheric hyperconnectivity from left inferior parietal lobule (IPL) to right Broca's area observed.
  • 1-back task: Maladaptive within-frontal and intra-hemispheric hypoconnectivity, including between IPL and frontopolar cortex (FPC).

Conclusions:

  • The parietal cortex plays a significant role in PSED and should be included in fNIRS studies.
  • PSED patients display distinct FC patterns: compensatory during Stroop, maladaptive during 1-back.
  • Future neuromodulation strategies targeting frontal and parietal cortices may improve cognitive outcomes in stroke survivors.