Related Experiment Videos
Paraspinal electromyography that compares concentric with monopolar needles: a blinded study
Henry C Tong1, Irene A Young, John Koch
1Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor 48108-0744, USA.
American Journal of Physical Medicine & Rehabilitation
|November 25, 2003
Summary
Paraspinal muscle needle electromyography shows good interrater reliability with both monopolar and concentric needles. This supports its validity and allows data from different needle types to be used interchangeably.
Area of Science:
- Neurology
- Musculoskeletal Research
- Diagnostic Techniques
Background:
- Paraspinal muscle electromyography (EMG) is crucial for diagnosing low back pain.
- Establishing reliability and normative data is essential for accurate interpretation.
Purpose of the Study:
- To determine interrater reliability of paraspinal needle EMG using monopolar and concentric needles.
- To establish normative data for paraspinal needle EMG studies.
Main Methods:
- A mini-paraspinal mapping needle technique was employed.
- Evaluations were conducted by two electromyographers (one blinded, one unblinded).
- Participants included individuals with and without radiating low back pain.
Main Results:
- High interrater reliability was observed for both needle types (ICC 0.793–0.966).
- Mean scores in asymptomatic individuals were low (0.25).
- Concentric and monopolar needles showed good correlation.
Conclusions:
- Needle EMG of paraspinal muscles demonstrates good interrater reliability, supporting its diagnostic validity.
- Findings suggest data from monopolar and concentric needles are comparable.
- A cutoff score of >2 effectively identifies abnormalities with a low false-positive rate (<5%).