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April 17, 2019Scientific ReportsOpen Access

Limb linkage rehabilitation training-related changes in cortical activation and effective connectivity after stroke: A functional near-infrared spectroscopy study

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Key result

During a limb linkage rehabilitation task, stroke patients showed significantly lower effective connectivity in high-frequency intervals (p < 0.025) and increased influence of the motor and occipital cortices on the contralesional prefrontal cortex compared to healthy controls.

Why the study?

Stroke causes long-term disability, and the cortical activation and effective connectivity changes within functional brain networks during limb linkage rehabilitation training were unclear.

Does limb linkage rehabilitation training alter cortical activation and effective connectivity in stroke patients compared to healthy controls?

Comparison

Resting state vs upper and lower limb linkage motor rehabilitation task

Design

Functional near-infrared spectroscopy imaging study

Authors

CHCongcong HuoGXGongcheng XuZLZengyong Li

Discussion

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Member takes

Overview

Should not yet change limb linkage protocols in stroke; hypothesis-generating for contralesional prefrontal targets.

Study Design

Type

Cross-Sectional (n=29)

Multicenter

No

Structured PICO

Does limb linkage rehabilitation training alter cortical activation and effective connectivity in stroke patients compared to healthy controls?

P
Population
29 participants, comprising 13 ischemic stroke patients with moderate to severe motor deficits and 16 healthy controls, evaluated for cortical activation during a 20-minute limb linkage rehabilitation task.
E
Exposure
Motor rehabilitation task with upper and lower limb linkage for 20 min (first 10 min [task_S1], last 10 min [task_S2])
C
Comparator
Resting state (10 min) and healthy controls
O
Outcome
Changes in cortical activation (delta HbO2 and delta HHb) and effective connectivity (EC) within a functional brain network measured by fNIRSsurrogate

Main Result

p-value: p=<0.025

Limitations

  • Small sample size
  • Large difference in time poststroke among the participants
  • Limitations related to the use of fNIRS as a functional imaging tool

Cite This Study

Huo et al. (2019) conducted a cross-sectional in Stroke (n=29). Limb linkage rehabilitation task vs. Healthy controls and resting state was evaluated on Effective connectivity (EC) in high-frequency intervals I and II (p=<0.025). During a limb linkage rehabilitation task, stroke patients showed significantly lower effective connectivity in high-frequency intervals (p < 0.025) and increased influence of the motor and occipital cortices on the contralesional prefrontal cortex compared to healthy controls.

synapsesocial.com/papers/6a22ad70b67b8d1b1fd2cd26https://doi.org/10.1038/s41598-019-42674-0
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Cortical response induced by task‐oriented training of the upper limb in subacute stroke patients as assessed by functional near‐infrared spectroscopy2022 · 14 citations
  2. 2Increased cerebral cortex activation in stroke patients during electrical stimulation of cerebellar fastigial nucleus with functional near-infrared spectroscopy2022 · 9 citations
  3. 3Altered Sensorimotor Lateralization and Cross-modal Consistency in Stroke: A Simultaneous EEG–fNIRS Study2026
  4. 4Use of cortical hemodynamic responses in digital therapeutics for upper limb rehabilitation in patients with stroke2024
  5. 5Identifying biomarkers related to motor function in chronic stroke: A <scp>fNIRS</scp> and <scp>TMS</scp> study2024 · 26 citations