Quantification of lumbar function part 3: Preliminary data on isokinetic torso rotation testing with myoelectric spectral analysis in normal and low-back pain subjects

Tom G. Mayer, Susan S. Smith, George Kondraske, Robert Joseph Gatchel, Timothy W. Carmichael, Vert Mooney

Research output: Contribution to journalArticle

61 Scopus citations

Abstract

A prototype isokinetic torso rotation unit and an EMG signal processing system were utilized to obtain preliminary information on torso rotation. In Study 1, range- of-motion was found to be surprisingly uniform between low-back pain patients and normal subjects, although there was a significant strength variation between them at all isokinetic speeds tested. Both female patients and normal females showed approximately 70%-75% of the strength (torque/body weight) levels relative to their male counterparts. The decrement in trunk strength at high speeds was proportional for both patients and controls and was not nearly as dramatic as the decrement seen in the sagittal plane. In Studies 2 and 3, anatomic relationships evaluated by EMG testing of obliques and erector spinae showed that the contralateral abdominal obliques were the most consistent muscles providing a significant torsional moment to the spine.

Original languageEnglish
Pages (from-to)912-920
Number of pages9
JournalSpine
Volume10
Issue number10
DOIs
StatePublished - 1 Jan 1985

Keywords

  • Isokinetic
  • Myoelectric fatigue analysis
  • Torsional injury
  • Torso rotation

Fingerprint Dive into the research topics of 'Quantification of lumbar function part 3: Preliminary data on isokinetic torso rotation testing with myoelectric spectral analysis in normal and low-back pain subjects'. Together they form a unique fingerprint.

  • Cite this