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Related Concept Videos

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The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
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A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers
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Developing Normal Turns-Amplitude Clouds for Upper and Lower Limbs.

Joe F Jabre1, Sergey G Nikolayev, Michael B Babayev

  • 1*Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, California, U.S.A.; †Neurophysiological Centre, Elf Ltd Medical Company, Vladimir, Russia; ‡Innovations Department, Neurosoft Ltd, Ivanovo, Russia; §Department of Mathematical Software, Neurosoft Ltd, Ivanovo, Russia; and ‖Department of Functional Diagnostics, Regional Hospital for War Veterans, Ivanovo, Russia.

Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society
|February 25, 2016
PubMed
Summary
This summary is machine-generated.

This study establishes normal values for turns and amplitude analysis (T&A) in upper and lower extremity muscles. These findings aid in detecting neurogenic and myopathic abnormalities during low-to-moderate muscle contractions.

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Area of Science:

  • Neurology
  • Electromyography
  • Biomedical Engineering

Background:

  • Turns and amplitude analysis (T&A) is crucial for automatic EMG interference pattern analysis.
  • Existing T&A normal values are limited to a few muscles.
  • There is a need for comprehensive T&A normative data.

Purpose of the Study:

  • To establish normal T&A clouds for upper and lower extremity muscles.
  • To expand the availability of T&A normative data for a wider range of muscles.
  • To provide reference data for EMG interference pattern analysis.

Main Methods:

  • Conducted T&A normative data collection using concentric needle electrodes.
  • Recruited 68 men and 56 women aged 20 to 60 years.
  • Analyzed EMG interference patterns to generate T&A clouds.

Main Results:

  • Successfully obtained normal T&A clouds for upper and lower extremity muscles.
  • Presented the normative T&A data for clinical and research use.
  • Data covers a broad range of muscles not previously documented.

Conclusions:

  • The derived T&A normal values can assist in identifying neurogenic and myopathic abnormalities.
  • Applicable for both men and women during low-to-moderate muscle contractions.
  • Discusses the impact of high-force contractions on T&A data and potential misinterpretation.