Abstract
We describe a new method of turns-amplitude analysis of electromyography interference patterns, modified from the original Stalberg's method. Ten samples were obtained from one muscle at maximum voluntary contraction. As indices of amplitude (A), the average of the three highest and three lowest values from the ten samples was calculated. Similar indices were calculated for turns (T) and the T/A ratio. A total of six indices were evaluated. Criteria for abnormalities in these six indices were determined through a control study of healthy volunteers. The test-retest reliability of the six indices was confirmed in the extensor digitorum communis muscle, and the Pearson product-moment correlation coefficients ranged from 0.767 to 0.907 (P <0.01). The clinical usefulness of this method was evaluated in 21 patients with mild or moderate neuromuscular disorders. Abnormalities in the T/A indices were found in 77.8%-100% of the patients, a higher incidence of abnormality than for the other indices. Two of the three criteria were found to be abnormal in 80% of patients with myopathy and in 78.6% of those with neuropathy. The diagnostic sensitivity of our method in these patients was 79.2% (19 of 24 studies [in 3 patients with myopathy, two muscles were examined]). The clinical usefulness of our method of analysis appears to be similar to that in other reports of turns-amplitude analyses.
| Original language | English |
|---|---|
| Pages (from-to) | 283-288 |
| Number of pages | 6 |
| Journal | Journal of Orthopaedic Science |
| Volume | 2 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1997 |
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Keywords
- Neuromuscular disease
- Quantitative electromyography
- Turns-amplitude analysis
ASJC Scopus subject areas
- Surgery
Cite this
Diagnostic value of turns-amplitude analysis in neuromuscular disease. / Hamada, Masanori; Nagashima, Hiroaki; Hashizume, Hiroyuki; Senda, Masuo; Yagata, Yukihisa.
In: Journal of Orthopaedic Science, Vol. 2, No. 5, 1997, p. 283-288.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Diagnostic value of turns-amplitude analysis in neuromuscular disease
AU - Hamada, Masanori
AU - Nagashima, Hiroaki
AU - Hashizume, Hiroyuki
AU - Senda, Masuo
AU - Yagata, Yukihisa
PY - 1997
Y1 - 1997
N2 - We describe a new method of turns-amplitude analysis of electromyography interference patterns, modified from the original Stalberg's method. Ten samples were obtained from one muscle at maximum voluntary contraction. As indices of amplitude (A), the average of the three highest and three lowest values from the ten samples was calculated. Similar indices were calculated for turns (T) and the T/A ratio. A total of six indices were evaluated. Criteria for abnormalities in these six indices were determined through a control study of healthy volunteers. The test-retest reliability of the six indices was confirmed in the extensor digitorum communis muscle, and the Pearson product-moment correlation coefficients ranged from 0.767 to 0.907 (P <0.01). The clinical usefulness of this method was evaluated in 21 patients with mild or moderate neuromuscular disorders. Abnormalities in the T/A indices were found in 77.8%-100% of the patients, a higher incidence of abnormality than for the other indices. Two of the three criteria were found to be abnormal in 80% of patients with myopathy and in 78.6% of those with neuropathy. The diagnostic sensitivity of our method in these patients was 79.2% (19 of 24 studies [in 3 patients with myopathy, two muscles were examined]). The clinical usefulness of our method of analysis appears to be similar to that in other reports of turns-amplitude analyses.
AB - We describe a new method of turns-amplitude analysis of electromyography interference patterns, modified from the original Stalberg's method. Ten samples were obtained from one muscle at maximum voluntary contraction. As indices of amplitude (A), the average of the three highest and three lowest values from the ten samples was calculated. Similar indices were calculated for turns (T) and the T/A ratio. A total of six indices were evaluated. Criteria for abnormalities in these six indices were determined through a control study of healthy volunteers. The test-retest reliability of the six indices was confirmed in the extensor digitorum communis muscle, and the Pearson product-moment correlation coefficients ranged from 0.767 to 0.907 (P <0.01). The clinical usefulness of this method was evaluated in 21 patients with mild or moderate neuromuscular disorders. Abnormalities in the T/A indices were found in 77.8%-100% of the patients, a higher incidence of abnormality than for the other indices. Two of the three criteria were found to be abnormal in 80% of patients with myopathy and in 78.6% of those with neuropathy. The diagnostic sensitivity of our method in these patients was 79.2% (19 of 24 studies [in 3 patients with myopathy, two muscles were examined]). The clinical usefulness of our method of analysis appears to be similar to that in other reports of turns-amplitude analyses.
KW - Neuromuscular disease
KW - Quantitative electromyography
KW - Turns-amplitude analysis
UR - http://www.scopus.com/inward/record.url?scp=0030987561&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030987561&partnerID=8YFLogxK
U2 - 10.1007/BF02488911
DO - 10.1007/BF02488911
M3 - Article
AN - SCOPUS:0030987561
VL - 2
SP - 283
EP - 288
JO - Journal of Orthopaedic Science
JF - Journal of Orthopaedic Science
SN - 0949-2658
IS - 5
ER -