Face EMG Topographic Analysis of Mimetic Movements in Patients with Bell's Palsy

Ohyama, Masaru; Obata, Etsuro; Furuta, Shigeru; Sakamoto, Kunihiko; Ohbori, Y.; Iwabuchi, Yasuo

doi:10.3109/00016488709121841

Cited by 7 publications

(8 citation statements)

References 7 publications

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“…Up to now, similar approaches using non-invasive multi-channel techniques, considered only the lower and middle facial nerve innervated facial muscles without the inclusion of the ocular region (Cacou et al, 1996;Lapatki et al, 2003), or used too few measuring points in both regions (Ohyama et al, 1988). A more detailed characterization, including the ocular and forehead regions, would be important from a clinical point of view.…”

Section: Introductionmentioning

confidence: 98%

Facial muscle activation patterns in healthy male humans: A multi-channel surface EMG study

Schumann

Bongers

Guntinas‐Lichius

et al. 2010

Journal of Neuroscience Methods

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Section: Introductionmentioning

confidence: 98%

Facial muscle activation patterns in healthy male humans: A multi-channel surface EMG study

Schumann

Bongers

Guntinas‐Lichius

et al. 2010

Journal of Neuroscience Methods

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“…Previous studies have found decreased corrugator muscle activity and increased greater zygomatic muscle activity with positive emotional stimulation, and increased corrugator muscle activity and decreased greater zygomatic muscle activity with negative emotional stimulation . Ohyama and Kobata used fEMG topography derived from neuromuscular unit potentials from 16 electrodes to grade facial movement loss and diagnose paralysis in patients with facial nerve palsy . The focus to date has been on diagnosis and treatment based on methods such as assessing the countenances associated with various diseases, and we think it is possible to determine individual facial expressions based on facial muscle activity.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12] Ohyama and Kobata used fEMG topography derived from neuromuscular unit potentials from 16 electrodes to grade facial movement loss and diagnose paralysis in patients with facial nerve palsy. 13,14 The focus to date has been on diagnosis and treatment based on methods such as assessing the countenances associated with various diseases, and we think it is possible to determine individual facial expressions based on facial muscle activity. Applying these techniques to nursing seems likely to allow objective assessment of changes in muscle activity associated with changes in facial expression, increasing the objectivity with which nurses understand their patients.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of facial muscle activity during voluntary facial expressions: Imaging analysis of facial expressions based on myogenic potential data

Kuramoto

Yoshinaga

Nakao

et al. 2019

Neuropsychopharm Rep

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Purpose Facial expressions are formed by the coordination of facial muscles and reflect changes in emotion. Nurses observe facial expressions as way of understanding patients. This study conducted basic research using facial myogenic potential topography to visually determine changes in the location and strength of facial muscle activity associated with voluntary facial expression to examine relationships with facial expressions. Methods Participants comprised 18 healthy adults (6 men, 12 women; mean age, 24.3 ± 4.3 years). Facial myogenic potentials were measured from 19 electrodes arranged concentrically on the face, and topographic analysis was conducted. Using potential changes and topograms, the muscle activity associated with nonvoluntary facial expression and voluntary facial expressions of happiness and disgust were classified according to the characteristics of expressions. To classify homogeneous groups among the reaction of disgust, hierarchical cluster analysis was utilized. Results One characteristic of the facial expression of happiness was activity in areas including the greater zygomatic muscle. With the facial expression of disgust, characteristic changes were seen in areas including the corrugator supercilii. Cluster analysis of the expression of disgust showed four homogeneous subgroups. Conclusion With facial myogenic potential topography, facial expressions can be evaluated objectively without being influenced by face shape or countenance. Color changes in topograms showed subtle changes in expressions that could not be supplemented with statistical processing alone, and these were useful in identifying individuality. Topography is thus expected to be utilized to supplement basic knowledge of facial expressions for a better understanding of patients.

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“…10,18,24,36,38). Although single MU analysis is a key attraction of multichannel sEMG, spatial (or topographical) information from a muscle is also useful in other respects: 1) it allows the construction of higher order electrode montages for spatial filtering (7,15); 2) the muscle's spatial functional properties can be studied and mapped, respectively (19,27,32); 3) grid areas with high signal amplitude can be selected (online or offline) for more detailed inspection or analysis (20).…”

mentioning

confidence: 99%

A thin, flexible multielectrode grid for high-density surface EMG

Lapatki¹,

Dijk²,

Jonas³

et al. 2004

Journal of Applied Physiology

142

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Although the value of high-density surface electromyography (sEMG) has already been proven in fundamental research and for specific diagnostic questions, there is as yet no broad clinical application. This is partly due to limitations of construction principles and application techniques of conventional electrode array systems. We developed a thin, highly flexible, two-dimensional multielectrode sEMG grid, which is manufactured by using flexprint techniques. The material used as electrode carrier (Polyimid, 50 microm thick) allows grids to be cut out in any required shape or size. One universal grid version can therefore be used for many applications, thereby reducing costs. The reusable electrode grid is attached to the skin by using specially prepared double-sided adhesive tape, which allows the selective application of conductive cream only directly below the detection surfaces. To explore the practical possibilities, this technique was applied in single motor unit analysis of the facial musculature. The high mechanical flexibility allowed the electrode grid to follow the skin surface even in areas with very uneven contours, resulting in good electrical connections in the whole recording area. The silverchloride surfaces of the electrodes and their low electrode-to-skin impedances guaranteed high baseline stability and a low signal noise level. The electrode-to-skin attachment proved to withstand saliva and great tensile forces due to mimic contractions. The inexpensive, universally adaptable and minimally obstructive sensor allows the principal advantages of high-density sEMG to be extended to all skeletal muscles accessible from the skin surface and may lay the foundation for more broad clinical application of this noninvasive, two-dimensional sEMG technique.

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Face EMG Topographic Analysis of Mimetic Movements in Patients with Bell's Palsy

Cited by 7 publications

References 7 publications

Facial muscle activation patterns in healthy male humans: A multi-channel surface EMG study

Facial muscle activation patterns in healthy male humans: A multi-channel surface EMG study

Characteristics of facial muscle activity during voluntary facial expressions: Imaging analysis of facial expressions based on myogenic potential data

A thin, flexible multielectrode grid for high-density surface EMG

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