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Related Experiment Video

Updated: May 5, 2026

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Side-Dependent Trunk Muscle Modulation During Sit-to-Stand After Stroke: An Exploratory EMG and Kinematic Study.

Grazia Cravero1, Alice De Luca2, Beatrice Lagomarsino1

  • 1Department of Informatics, Bioengineering, Robotics and Systems Engineering, University of Genoa, 16145 Genoa, Italy.

Sensors (Basel, Switzerland)
|May 4, 2026
PubMed
Summary

Stroke survivors often struggle with sit-to-stand (STS) movements. This study found that altered trunk muscle coordination, particularly on the weaker side, contributes to compensatory strategies during STS, impacting balance and movement efficiency.

Keywords:
electromyographykinematicssit-to-standstroketrunk muscles

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Area of Science:

  • Neuroscience
  • Rehabilitation Medicine
  • Biomechanics

Background:

  • Sit-to-stand (STS) is a crucial daily activity often impaired after stroke.
  • While lower-limb issues are studied, trunk muscle roles in post-stroke STS compensation are less understood.

Purpose of the Study:

  • To investigate kinematic and neuromuscular trunk strategies during STS in individuals with chronic hemiparesis.
  • To characterize phase-dependent asymmetries and side-dependent trunk muscle modulation relevant for rehabilitation.

Main Methods:

  • Utilized optoelectronic motion capture and surface electromyography for synchronized kinematic and neuromuscular data.
  • Analyzed STS performance in seven participants with chronic right-sided hemiparesis under free and crossed-arm conditions.

Main Results:

  • Participants showed prolonged STS durations and significant ankle/hip asymmetries, relying more on the less impaired limb.
  • Trunk muscles (latissimus dorsi, erector spinae longissimus, multifidus) exhibited prolonged activation on the more impaired side.

Conclusions:

  • Altered trunk muscle modulation is a key compensatory strategy in post-stroke STS.
  • Trunk-focused neuromuscular assessment is vital for tailored rehabilitation to enhance symmetry, stability, and efficiency.