MUAP values of two facial muscles in normal subjects and comparison of two methods for data analysis

Papagianni, Aikaterini; Kokotis, Panagiotis; Karandreas, Nikolaos

doi:10.1002/mus.23327

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Using linear mixed models for statistical analysis we could overcome this limitation and found a significant correlation between quantitative EMG data and time course of reinnervation. Recordings from different healthy normal facial muscles reveal different MUP patterns as it has been shown in the present study and by Papagianni et al 11 To overcome the variability related to the investigated muscles, a z-score transformation was performed which is an established method for quantitative MUP analyses. 12 Here we did not record evoked compound muscle action potentials (CMAPs) which might give more detailed insights into the remodeling of the motor units during nerve regeneration compared with MUP analyses.…”

Section: Discussionsupporting

confidence: 67%

Quantitative facial electromyography monitoring after hypoglossal‐facial jump nerve suture

Volk

Granitzka

et al. 2017

Laryngoscope Investig Oto

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Objectives/HypothesisThe time course of the reinnervation of the paralyzed face after hypoglossal‐facial jump nerve suture using electromyography (EMG) was assessed. The relation to the clinical outcome was analyzed.Study DesignRetrospective single‐center cohort studyMethodsReestablishment of motor units was studied by quantitative EMG and motor unit potential (MUP) analysis in 11 patients after hypoglossal‐facial jump nerve suture. Functional recovery was evaluated using the Stennert index (0 = normal; 10 = maximal palsy).ResultsClinically, first movements were seen between 6 and >10 months after surgery in individual patients. Maximal improvement was achieved at 18 months. The Stennert index decreased from 7.9 ± 2.0 preoperatively to a final postoperative score of 5.8 ± 2.4. EMG monitoring performed for 2.8 to 60 months after surgery revealed that pathological spontaneous activity disappeared within 2 weeks. MUPs were first recorded after the 2nd month and present in all 11 patients 8–10 months post‐surgery. Polyphasic regeneration potentials first appeared at 4–10 months post‐surgery. The MUP amplitudes increased between the 3rd and 15th months after surgery to values of control muscles. The MUP duration was significantly increased above normal values between the 3rd and 24th months after surgery.ConclusionReinnervation can be detected at least 2 months earlier by EMG than by clinical evaluation. Changes should be followed for at least 18 months to assess outcome. EMG changes reflected the remodeling of motor units due to axonal regeneration and collateral sprouting by hypoglossal nerve fibers into the reinnervated facial muscle fibers.Level of Evidence3b.

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Section: Discussionsupporting

confidence: 67%

Quantitative facial electromyography monitoring after hypoglossal‐facial jump nerve suture

Volk

Granitzka

et al. 2017

Laryngoscope Investig Oto

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Quantitative Electromyography of the Frontalis Muscle

Matur

Baslo²,

Öge³

2014

Journal of Clinical Neurophysiology

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Valores de referencia de estudios de electromiografía de los músculos masetero y temporal

Albarracín

2023

Rev. Med.

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Los músculos masetero y temporal tienen mucha relevancia en el proceso de masticación; además, suelen verse afectados con enfermedades mioarticulares, neurológicas, entre otras. El objetivo de este estudio es presentar los resultados de electromiografía con electrodo de aguja de los músculos masetero y temporal al momento de la masticación, evaluando los parámetros en amplitud y duración de los potenciales obtenidos. Se tomaron veintiséis individuos con previa valoración de odontología que descartaba alteraciones congénitas, defectos de la masticación y con dinamometría normal en momento de mayor oclusión, a los cuales se les realizó electromiografía de aguja en los músculos masetero y temporal en la máxima oclusión; los resultados fueron analizados bajo el estudio de los valores de amplitud máxima y mínima, así como duración ubicando en percentiles y cuadriles, buscando determinar valores que puedan considerarse normales en esta muestra. Al estudiar el músculo temporal se encontró que la duración normal se encuentra entre 4,75 y 6,487 mseg, mientras que la amplitud se encontraría entre 1572,05 uV y 1038,03 uV; en el caso del músculo masetero, se evidenció que la duración normal se encuentra entre 4,03 y 6,767 mseg, mientras que la amplitud se encontraría entre 2838,43 uV y 1864,635 uV. Este estudio da a conocer valores propios para nuestra población en lo que respecta a duración y amplitud de los potenciales de acción de unidad motora de los músculos temporal y masetero, los cuales concuerdan con los establecidos previamente como normales. En estudios previos realizados en otras partes del mundo, se encontró que la duración es menor que en las extremidades, pero la amplitud es similar, aunque con tendencia a valores inferiores al promedio.

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MUAP values of two facial muscles in normal subjects and comparison of two methods for data analysis

Abstract: The set of normal values for frontalis and mentalis in this study could be useful in routine practice. Careful manual editing of the frontalis MUAPs is recommended for more accurate determination of their duration.

Cited by 3 publications

References 13 publications

Quantitative facial electromyography monitoring after hypoglossal‐facial jump nerve suture

Quantitative facial electromyography monitoring after hypoglossal‐facial jump nerve suture

Quantitative Electromyography of the Frontalis Muscle

Valores de referencia de estudios de electromiografía de los músculos masetero y temporal

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