Diagnostic laryngeal electromyography: The wake forest experience 1995-1999

Koufman, James A.; Postma, Gregory N.; Whang, Chris; Rees, Catherine J.; Amin, Milan R.; Belafsky, Peter C.; Johnson, Paul E.; Connolly, Kieran M.; Walker, Francis O.

doi:10.1067/mhn.2001.115856

Cited by 63 publications

(50 citation statements)

References 7 publications

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“…Anatomical parameters guided needled electrode insertion, as described in the literature, and the experience of the examiner with anatomical specimen dissections. [3][4][5][6] The needled electrode was first allocated to the CT muscle, perpendicular to the cricoid cartilage, 1.5cm from the midline.…”

Section: Series and Methodsmentioning

confidence: 99%

Eletromiografia laríngea e análise vocal em pacientes com Mal de Parkinson: estudo comparativo

Zarzur

Duarte²,

Gonçalves

et al. 2010

Braz. j. otorhinolaryngol. (Impr.)

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Parki nson's disease (PD) involves a progressive depletionof dopamine in the basal ganglia leading to motor alterations. Oral communication impairment occurs in 75% to 90% of patients and has been poorly studied. Aim: to asses laryngeal electromyography (LEMG) patterns and correlate them to vocal analysis in patients with Parkinson's disease. Materials and Methods: This is a prospective study. Twenty six adults with PD underwent laryngeal electromyography. Rest and phonation potentials were analyzed. VOXMETRIA® and GRAM 5.1.6. ® were used in acoustic analysis. Results: The main electromyographic pattern observed in the PD group was rest hypertonicity meaning that patients with PD presented with spontaneous intrinsic laryngeal muscle activity during voice rest, which occurred in 73% of the individuals. Not a case of laryngeal tremor was detected by electromyography, although vocal tremor was detected by VOXMETRIA in 69.5% of the individuals and in 61% of them by perceptive-auditive analysis. Conclusion: Vocal tremor was the main acoustic change in the PD group, with no correlation to LEMG findings.

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Section: Series and Methodsmentioning

confidence: 99%

Eletromiografia laríngea e análise vocal em pacientes com Mal de Parkinson: estudo comparativo

Zarzur

Duarte²,

Gonçalves

et al. 2010

Braz. j. otorhinolaryngol. (Impr.)

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“…The production of sound requires fine and precise motor synchronism of the laryngeal muscles; this is often affected in movement disorder patients 1 . Laryngeal electromyography (LEMG) is a useful diagnostic method for motor unit disorders [2][3][4][5][6][7][8] ; it can be used to establish the cause of laryngeal immobility [9][10][11] and help guide the needle to the correct location for botulinum toxin administration in laryngeal hyperkinetic movement disorder patients [12][13][14] . We describe preliminary LEMG pattern data from 25 patients complaining of dysphonia attending UNICAMP movement disorders ambulatory whose clinical examinations and laryngeal endoscopies suggested vocal fold hyperkinetic movement disorders.…”

mentioning

confidence: 99%

Laryngeal electromyography in movement disorders: preliminary data

Kimaid¹,

Quagliato²,

Crespo

et al. 2004

Arq. Neuro-Psiquiatr.

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-This study describes preliminary laryngeal electromyography (LEMG) data and botulinum toxin treatment in patients with dysphonia due to movement disorders. Twenty-five patients who had been clinically selected for botulinum toxin administration were examined, 19 with suspected laryngeal dystonia or spasmodic dysphonia (SD), 5 with vocal tremor, and 1 with Gilles de la Tourette syndrome (GTS). LEMG evaluations were performed before botulinum toxin administration using monopolar electrodes. Electromyography was consistent with dystonia in 14 patients and normal in 5, and differences in frequency suggesting essential tremor in 3 and Parkinson tremors in 2. The different LEMG patterns and significant improvement in our patients from botulinum toxin therapy has led us to perform laryngeal electromyography as a routine in UNICAMP movement disorders ambulatory.

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“…Koufman et al [3] published a large retrospective series showing that LEMG data altered the diagnostic imaging evaluation in 11 % of patients but no imaging modality was shown to be definitely superior to the other (magnetic resonance imaging (MRI) versus computed tomography (CT). They also reported that LEMG changed the timing and/or type of surgical procedure in 63 %.…”

Section: Discussionmentioning

confidence: 99%

“…Herein lies the role of Laryngeal electromyography (LEMG), a procedure for recording the electrophysiological phenomena occurring in the intrinsic laryngeal muscles using various types of electrodes [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Role of Laryngeal Electromyography in Predicting Recovery After Vocal Fold Paralysis

Guha

Sabarigirish

Singh

et al. 2014

Indian J Otolaryngol Head Neck Surg

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Accurate prognostication of the outcome of vocal fold immobility assumes great importance in the management. This study aimed to evaluate the prognostic efficacy of Laryngeal electromyography in cases of vocal fold immobility. A nonrandomized prospective study was carried out from Sep 2009 to Jun 2011. Patients were evaluated using Fiberoptic laryngoscopy and Laryngeal electromyography over a period of 24 weeks. 51 subjects participated in the study, comprised of 22 males and 29 females. All patients underwent detailed clinical examination including Fiberoptic laryngoscopy on the first visit and Laryngeal electromyography testing on the second visit. Subsequent neuromonitoring was carried out at 04, 12 and 24 weeks from date of initial recording. Outcome measures of vocal fold motion were dichotomized into persistent vocal fold immobility (unilateral or bilateral) or resolved vocal fold motion (normal). Approximately 24 weeks after onset of palsy, mobility of the paralyzed vocal cord was restored in 31 (60.78 %) of 51 cases, while 20 (39.22 %) remained immobile. Sensitivity of laryngeal electromyography was 92.53 % ; specificity 93.33 %, positive predictive value 98.77 % and negative predictive value 68.29 %. This study confirmed the utility of Laryngeal electromyography in predicting prognosis for recovery of vocal fold motion after laryngeal nerve injury. The results supported the hypothesis that Laryngeal electromyography data can be used effectively to determine a prognosis for recovery of vocal fold motion.

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Diagnostic laryngeal electromyography: The wake forest experience 1995-1999

Abstract: LEMG is a valuable diagnostic test that aids the clinician in the diagnosis and management of laryngeal neuromuscular disorders.

Cited by 63 publications

References 7 publications

Eletromiografia laríngea e análise vocal em pacientes com Mal de Parkinson: estudo comparativo

Eletromiografia laríngea e análise vocal em pacientes com Mal de Parkinson: estudo comparativo

Laryngeal electromyography in movement disorders: preliminary data

Role of Laryngeal Electromyography in Predicting Recovery After Vocal Fold Paralysis

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