Turns-amplitude analysis in normal and myopathic facial muscles.

Abstract:

:The purpose of this study was to assess turns/amplitude analysis (TAA) as an objective alternative to conventional qualitative electromyography (EMG) for detection of myopathy in facial muscles. Normal values of TAA parameters were calculated in the frontalis and mentalis muscles of 26 control subjects. We estimated the slope of the regression line of mean amplitude/turn values (MA) plotted against the number of turns/second (NT) and the resulting clouds. The 95% confidence limits of the cloud data were drawn as an ellipse. The sensitivity of TAA was determined from a group of 35 myopathic patients and specificity from a second group of 25 control subjects. Significant differences for every TAA parameter were found between frontalis and mentalis. Cumulative sensitivity and specificity of TAA for frontalis and mentalis were 74.6%, 56.5%, and 73.3%, 70.8%, respectively. With at least two of the aforementioned criteria abnormal, the sensitivity and specificity for frontalis and mentalis were 61.3%, 82.6%, and 56.7%, 100.0%, respectively.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Karandreas N,Kararizou E,Papagianni A,Zambelis T,Kokotis P

doi

10.1002/mus.21876

subject

Has Abstract

pub_date

2011-03-01 00:00:00

pages

342-7

issue

3

eissn

0148-639X

issn

1097-4598

journal_volume

43

pub_type

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