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Updated: Feb 9, 2026

Motor Dual-Tasks for Gait Analysis and Evaluation in Post-Stroke Patients
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Integrated Structural Analysis of Trunk Function Assessment After Stroke-New Evaluation Model Based on Multiscale

Yuki Tagami1, Shintaro Fujii2, Yasuhiro Inui2

  • 1Department of Neurorehabilitation, Graduate School of Health Sciences, Kio University, Nara, Japan; Department of Rehabilitation, Tokushima Red Cross Hospital, Tokushima, Japan.

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|February 7, 2026
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Summary

This study reveals a hierarchical structure of trunk function after stroke, progressing from static to dynamic movements. Findings offer a framework for better evaluation and personalized physical therapy for stroke survivors.

Keywords:
Exploratory factor analysisPatients with acute strokeRasch analysisRehabilitationTrunk function

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Area of Science:

  • Neurology
  • Rehabilitation Science
  • Biomedical Engineering

Background:

  • Trunk function is crucial for mobility and independence after stroke.
  • Existing assessments may not fully capture the complexity of trunk control.
  • A structured understanding of trunk function components is needed for effective rehabilitation.

Purpose of the Study:

  • To investigate the components of trunk function using multiple assessments.
  • To construct a new evaluation model for trunk function after stroke.
  • To clarify the factor structure and hierarchical organization of trunk function.

Main Methods:

  • Prospective observational cohort study of 200 early-onset stroke patients.
  • Utilized Verheyden and Fujiwara Trunk Impairment Scales (TIS-V and TIS-F), Functional Assessment for Control of Trunk (FACT), and Trunk Control Test (TCT).
  • Employed Exploratory Factor Analysis (EFA) and Rasch analysis to identify functional factors and their hierarchy.

Main Results:

  • EFA identified four functional factors: static sitting, basic movements, and two dynamic sitting task categories (More Challenging and Less Challenging).
  • Rasch analysis confirmed unidimensionality, revealing a hierarchical pattern of trunk function recovery.
  • Trunk function recovery progresses from static control to complex dynamic movements.

Conclusions:

  • This study is the first to clarify the factor structure and hierarchical organization of post-stroke trunk function.
  • Provides a framework for reorganizing evaluation tools and enhancing personalized physical therapy.
  • Suggests further research for a short-form version to improve clinical utility.