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Recording Methods of Muscle Activity "Onset".

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ClinicalTrials.gov Identifier: NCT00184535
Recruitment Status : Completed
First Posted : September 16, 2005
Last Update Posted : September 25, 2017
Information provided by (Responsible Party):

September 15, 2005
September 16, 2005
September 25, 2017
July 2005
October 2005   (Final data collection date for primary outcome measure)
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Complete list of historical versions of study NCT00184535 on ClinicalTrials.gov Archive Site
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Recording Methods of Muscle Activity "Onset".
Muscle Activity "Onset" in the Transversus Abdominis - Simultaneous Recordings by Intramuscular Electromyography and High Frame Rate Ultrasound Imaging.
Delayed anticipatory muscle activity response in deep low back and abdominal muscles has been observed in patients with low back pain, indicative of a pathological condition. Muscle activity onset is traditionally recorded by intramuscular electromyography, but there is a need for a less cumbersome recording method in large clinical studies. The purpose of this experimental study is to explore whether high-frame rate m-mode ultrasound and tissue velocity imaging could measure anticipatory muscle responses ("onset") in the abdominal muscles reliably and comparably accurate to intramuscular EMG.
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Observational Model: Case-Only
Time Perspective: Cross-Sectional
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Non-Probability Sample
Healthy men and women between 30-65 yrs with no recent low back pain
Low Back Pain
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Vasseljen O, Dahl HH, Mork PJ, Torp HG. Muscle activity onset in the lumbar multifidus muscle recorded simultaneously by ultrasound imaging and intramuscular electromyography. Clin Biomech (Bristol, Avon). 2006 Nov;21(9):905-13. Epub 2006 Jul 5.

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
October 2005
October 2005   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Healthy
  • 30-65 yrs

Exclusion Criteria:

  • recent low back pain
  • low back, neck or shoulder pain inflicting work absence or bed rest
  • cardiac, rheumatic or other serious illness
  • pregnancy
Sexes Eligible for Study: All
30 Years to 65 Years   (Adult)
Contact information is only displayed when the study is recruiting subjects
REK 4.2005.885
Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Not Provided
Norwegian University of Science and Technology
Norwegian University of Science and Technology
Norwegian Fund for Postgraduate Training in Physiotherapy
Study Chair: Ottar Vasseljen, PhD Norw. Univ of Sci and Technol
Norwegian University of Science and Technology
September 2017