A Preliminary Study of the Prognostic Role of Electromyography in Laryngeal Paralysis

Confidence in the reliability of laryngeal electromyography to predict recovery is critical if this tool is to be used to select the type and timing of surgical intervention. The characteristics of electromyography of 14 patients with unilateral vocal fold paralysis were assessed to determine which factor or combination of factors would be most useful in determining prognosis. We examined the duration, amplitude, waveform morphology, root-mean-square, and time interval from onset to electromyography recording. The results supported the concept that electromyography recordings are valuable in determining prognosis if performed before 6 months and preferably within 6 weeks of onset of laryngeal paralysis. A positive prognosis for laryngeal recovery was indicated when the following electromyography features were present in the immobile vocal fold: (1) normal motor unit waveform morphology. (2) overall electromyography activity characterized by a root-mean-square value greater than 40 μV in any one task, and (3) no electrical silence during voluntary tasks. On the basis of this criteria our overall correct prognostic rate was 89%.

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Determinant factors of successful social entrepreneurship in the emerging circular economy of Lebanon: exploring the moderating role of NGOs

Journal of Entrepreneurship in Emerging Economies ◽

10.1108/jeee-08-2021-0323 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Hani El Chaarani ◽

Lukman Raimi

Keyword(s):

Root Mean Square ◽

Social Entrepreneurship ◽

Circular Economy ◽

Psychological Factors ◽

Mean Square ◽

Social Entrepreneurs ◽

Content Type ◽

Determinant Factors ◽

Fit Index

Purpose Social entrepreneurship is gradually becoming a potent driving force for economic and social development in developing countries as a result of governance deficits. The purpose of this study is to examine the determinant factors of successful social entrepreneurship in the emerging circular economy of Lebanon. The objective extends to exploring the mediating role of non-governmental organizations (NGOs) in the success of social entrepreneurship in Lebanon. Design/methodology/approach Using a cross-sectional survey design, the authors collected primary data from 389 social entrepreneurs through questionnaires in selected locations in Lebanon. The data collected were analyzed using descriptive and inferential statistics. The hypotheses were tested using linear regression and structural equation modeling (SEM) for predicting the impact of independent variable on the dependent variable. The validity, progressive and various models fits were tested using root mean square of approximation, root mean square of residuals, standard root mean square residuals, incremental fit index, fitness of the extracted and non-normal fit index. Findings The SEM estimations reveal that three main factors determine the success of social entrepreneurs in Lebanon, namely, environmental factors, psychological factors and prior experience. Moreover, the results reveal that support of NGOs positively moderates the relationships between the success of social entrepreneurship and two different variables (psychological factors and environmental factors), but failed to moderate the relationships between success of social entrepreneurship and four variables (experience, education, leadership and founding team composition). Originality/value The study contributes to the entrepreneurship and circular economy literature by explicating empirically the determinant factors of successful social entrepreneurship in Lebanon’s emerging circular economy. It also provides a fact-based social awareness on the role of local and international NGOs in supporting the social entrepreneurs in driving the idea of a circular economy. The study also validates multiple entrepreneurship theories.

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Spasticity assessment based on the Hilbert–Huang transform marginal spectrum entropy and the root mean square of surface electromyography signals: a preliminary study

BioMedical Engineering OnLine ◽

10.1186/s12938-018-0460-1 ◽

2018 ◽

Vol 17 (1) ◽

Cited By ~ 7

Author(s):

Baohua Hu ◽

Xiufeng Zhang ◽

Jingsong Mu ◽

Ming Wu ◽

Yong Wang

Keyword(s):

Root Mean Square ◽

Surface Electromyography ◽

Mean Square ◽

Hilbert Huang Transform ◽

Marginal Spectrum ◽

Preliminary Study ◽

Electromyography Signals

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Role of Gene Therapy in the Management of Unilateral Vocal Fold Paralysis

Gene Therapy Applications ◽

10.5772/21775 ◽

2011 ◽

Author(s):

Kevin Fung

Keyword(s):

Gene Therapy ◽

Vocal Fold ◽

Vocal Fold Paralysis ◽

Unilateral Vocal Fold Paralysis

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The role of stroboscopy in the management of a patient with a unilateral vocal fold paralysis

The Journal of Laryngology & Otology ◽

10.1017/s0022215100132980 ◽

1996 ◽

Vol 110 (2) ◽

pp. 141-143 ◽

Cited By ~ 15

Author(s):

Meredydd Lloyd Harries ◽

Murray Morrison

Keyword(s):

Surgical Treatment ◽

Diagnostic Tool ◽

Vocal Fold ◽

Speech Therapy ◽

Muscle Tone ◽

Vocal Folds ◽

Vocal Fold Paralysis ◽

Unilateral Vocal Fold Paralysis

AbstractStroboscopy is well established as an essential diagnostic tool in the assessment of the vocal folds during phonation. This paper analyses the stroboscopic findings in 100 patients with a unilateral vocal fold paralysis. Reliable stroboscopic signals were only obtained in patients with the paralysed fold close to the midline. These patients seldom require surgery however, usually responding to speech therapy with laryngeal compensation giving a good voice. Most patients that require surgery have a large glottal deficiency, but in this series these patients did not give an adequate signal for analysis. Although useful in the assessment of the muscle tone of the paralysed fold, the influence of stroboscopy on the surgical treatment in this series was limited.

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Role of Observational Errors in Optimum Interpolation Analysis

Bulletin of the American Meteorological Society ◽

10.1175/1520-0477-59.12.1603 ◽

1978 ◽

Vol 59 (12) ◽

pp. 1603-1611 ◽

Cited By ~ 13

Author(s):

Kenneth H. Bergman

Keyword(s):

Observational Data ◽

Root Mean Square ◽

Mean Square ◽

Observational Error ◽

Optimum Interpolation ◽

Analysis Scheme ◽

Data Statistics ◽

Observational Errors ◽

Interpolation Analysis

The theory of optimum interpolation analysis is presented, with emphasis on the role that observational errors have in the analysis scheme. It is shown that an estimate of the root-mean-square observational error is required and also that the correlations between errors of observations, if nonzero, must be specified. Methods of determining these quantities from observational data statistics are discussed and examples shown. Finally, error-checking routines that either accept or reject data are described. It is pointed out that care should be exercised when checking for errors so that good and useful data are not inadvertently rejected.

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