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Related Experiment Video

Updated: Mar 2, 2026

Magnetic Resonance Elastography Methodology for the Evaluation of Tissue Engineered Construct Growth
12:18

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Quantifying spasticity in individual muscles using shear wave elastography.

Sarah F Eby1,2, Heng Zhao3, Pengfei Song4

  • 1Mayo Medical School, Mayo Graduate School, and the Medical Scientist Training Program, College of Medicine, Mayo Clinic, 200 First St. SW, Rochester, MN 55905, USA.

Radiology Case Reports
|May 12, 2017
PubMed
Summary
This summary is machine-generated.

Shear wave elastography (SWE) offers a new way to measure spasticity after stroke. This technique quantitatively assessed muscle stiffness, showing promise for improved spastic reflex evaluation.

Keywords:
Muscle spasticitySkeletal muscleStrokeUltrasoundUpper extremity

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Area of Science:

  • Neurology
  • Biomedical Engineering
  • Rehabilitation Medicine

Background:

  • Stroke frequently causes spasticity, hindering motor function recovery.
  • Current spasticity assessment methods (e.g., Modified Ashworth Scale) lack reliability and objectivity.
  • Developing quantitative measures for spasticity is crucial for research and clinical practice.

Observation:

  • This study explored using shear wave elastography (SWE) to evaluate the spastic reflex in the biceps brachii.
  • Measurements were taken during passive elbow extension in a stroke survivor with spastic hemiparesis.
  • Conventional clinical scores (Fugl-Meyer, Modified Ashworth) were compared with SWE data.

Findings:

  • Shear wave elastography detected increased muscle stiffness in the brachialis muscle, particularly at higher velocities.
  • This velocity-dependent stiffness increase correlated with the spastic reflex during passive limb movement.
  • SWE provided real-time, quantitative data on muscle stiffness, reflecting spasticity.

Implications:

  • SWE demonstrates potential as a reliable, objective tool for quantifying spasticity.
  • This technique could enhance the evaluation of spasticity in clinical settings and research.
  • Quantitative SWE measures may facilitate personalized treatment strategies for post-stroke spasticity.