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Related Concept Videos

Ultrasonography01:17

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called a...

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A Novel Application of Musculoskeletal Ultrasound Imaging
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Ultrasound Strain Zero-Crossing for Assessing Adult Hypertonic Muscles: A Feasibility Study.

Jing Gao1, Jonathan M Rubin2

  • 1Rocky Vista University, Montana College of Osteopathic Medicine, Billings, MT, USA.

Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine
|September 12, 2025
PubMed
Summary

Ultrasound strain zero-crossing (ZC) can effectively assess adult hypertonic muscles. This method shows good diagnostic performance for identifying muscle hypertonicity.

Keywords:
muscle hypertonicityosteopathic manipulative treatmentspeckle trackingultrasound strain elastographyzero‐crossing

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Area of Science:

  • Musculoskeletal Ultrasound
  • Biomechanics
  • Medical Diagnostics

Background:

  • Muscle hypertonicity is a common clinical challenge.
  • Accurate assessment of muscle tone is crucial for effective treatment.
  • Current methods for assessing muscle hypertonicity have limitations.

Purpose of the Study:

  • To evaluate the feasibility of ultrasound strain zero-crossing (ZC) as a quantitative measure for adult hypertonic muscles.
  • To determine the diagnostic performance of ZC in identifying muscle hypertonicity.

Main Methods:

  • Prospective ultrasound strain imaging (USI) was performed on normal and hypertonic upper trapezius muscles.
  • Two-dimensional speckle tracking software analyzed tissue deformation and relaxation.
  • Zero-crossing (ZC) points were compared between normal and hypertonic muscle groups; Modified Ashworth Scale (MAS) was used for clinical assessment.

Main Results:

  • A statistically significant difference in ZC was observed between normal and hypertonic muscles (P < .001).
  • The area under the ROC curve for ZC in detecting ≥mild hypertonic muscles was 0.92.
  • USI demonstrated feasibility in assessing muscle tone.

Conclusions:

  • Ultrasound strain ZC is a feasible technique for assessing adult hypertonic muscles.
  • ZC offers good diagnostic performance for identifying ≥mild hypertonic muscles.
  • This quantitative ultrasound method shows promise for clinical application.