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https://www.readbyqxmd.com/read/28226834/a-survey-on-the-feasibility-of-surface-emg-in-facial-pacing
#1
Ville Rantanen, Mirja Ilves, Antti Vehkaoja, Anton Kontunen, Jani Lylykangas, Eeva Makela, Markus Rautiainen, Veikko Surakka, Jukka Lekkala, Ville Rantanen, Mirja Ilves, Antti Vehkaoja, Anton Kontunen, Jani Lylykangas, Eeva Makela, Markus Rautiainen, Veikko Surakka, Jukka Lekkala, Veikko Surakka, Jukka Lekkala, Mirja Ilves, Markus Rautiainen, Anton Kontunen, Antti Vehkaoja, Jani Lylykangas, Ville Rantanen, Eeva Makela
A survey on the feasibility of surface electromyography (EMG) measurements in facial pacing is presented. Pacing for unilateral facial paralysis consists of the measurement of activity from the healthy side of the face and functional electrical stimulation to reanimate the paralyzed one. The goal of this study is to evaluate the feasibility of surface EMG as a measurement method to detect muscle activations and to determine their intensities. Prior work is discussed, and results from experiments where 12 participants carried out a set of facial movements are presented...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226378/mandibular-rim-trilogy-with-botulinum-toxin-injection-reduction-projection-and-lift
#2
Renpeng Zhou, Benyun Pan, Chen Wang, Danru Wang
"Onabotulinum toxin A (Botox) revolution" has brought the fundamental change in the facial rejuvenation as well as the concept of microinjection. The aesthetic standard tends to be the "globalization"; however, Asians have different aesthetic cultures and unique facial features compared with Caucasians. A new rejuvenation concept is proposed during our practice; the Asian face should preserve the original facial identity during Botox treatments. The lower face is treated with botulinum toxin to achieve a harmonious facial profile...
February 2017: Facial Plastic Surgery: FPS
https://www.readbyqxmd.com/read/28223013/genetic-response-in-masseter-muscle-after-orthognathic-surgery-in-comparison-with-healthy-controls-a-microarray-study
#3
Maya Marewski, Carola Petto, Matthias Schneider, Winfried Harzer
One third of adult patients with orthognathic surgery of a prognathic or retrognathic mandible show relapse. The sagittal split osteotomy of the mandible leads to a displacement of both parts up to 10 mm without any changes of muscle attachment. Changed mandible length needs adaptation of muscle capacity because of changed force to moment ratio. The aim of this Microarray study was to analyze the general genetic response of masseter muscle in patients with retrognathism or prognathism of the mandible six months after surgery in comparison with healthy untreated controls...
January 25, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28202999/-changes-of-productions-of-energy-metabolism-in-masseter-of-rats-induced-by-occlusal-interference
#4
X X Xu, Y Cao, K Y Fu, Q F Xie
OBJECTIVE: To investigate the effect of occlusal interference on the energy metabolism of masticatory muscle by studying the changes of adenosine triphosphate (ATP), adenosine diphosphate (ADP), inosine monophosphate (IMP), phosphocreatine, creatine, lactate and pH level in masseter muscles of rats after occlusal interference. METHODS: Fifty male Sprague-Dawley rats were randomly assigned into experimental group (n=40) and control group (n=10). In experimental group, 0...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28194098/spatiotemporal-profiles-of-proprioception-processed-by-the-masseter-muscle-spindles-in-rat-cerebral-cortex-an-optical-imaging-study
#5
Satoshi Fujita, Mari Kaneko, Hiroko Nakamura, Masayuki Kobayashi
Muscle spindles in the jaw-closing muscles, which are innervated by trigeminal mesencephalic neurons (MesV neurons), control the strength of occlusion and the position of the mandible. The mechanisms underlying cortical processing of proprioceptive information are critical to understanding how sensory information from the masticatory muscles regulates orofacial motor function. However, these mechanisms are mostly unknown. The present study aimed to identify the regions that process proprioception of the jaw-closing muscles using in vivo optical imaging with a voltage-sensitive dye in rats under urethane anesthesia...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28193127/relations-between-the-results-of-complex-clinical-and-neurophysiological-examinations-in-patients-with-temporomandibular-disorders-symptoms
#6
Anna Sójka, Juliusz Huber, Wiesław Hędzelek, Agnieszka Wiertel-Krawczuk, Agnieszka Szymankiewicz-Szukała, Agnieszka Seraszek-Jaros, Aleksandra Kulczyk, Agnieszka Wincek, Magdalena Sobieska
OBJECTIVE: Reinvestigation of clinical importance of surface electromyography recordings (sEMG) from the masticatory, neck and shoulder girdle muscles in patients with various clinically detected temporomandibular disorders (TMDs). METHODS: Fifty women with myalgia diagnosis of Axis I DC/TMD and the same number of healthy female volunteers were studied clinically and neurophysiologically by means of sEMG. RESULTS: Unilateral more than bilateral complex symptoms of TMDs were related to the non-neurogenic masticatory rather than neck and shoulder girdle muscles dysfunctions at rest...
February 14, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/28188109/quantitative-evaluation-of-masseter-muscle-stiffness-in-patients-with-temporomandibular-disorders-using-shear-wave-elastography
#7
Makiko Takashima, Yoshiaki Arai, Atsushi Kawamura, Takafumi Hayashi, Ritsuo Takagi
PURPOSE: The aim of this study was to quantify masseter muscle stiffness in patients with masticatory myofascial pain. METHODS: Stiffness was measured using shear wave elastography, which expresses stiffness as shear wave velocity (Vs). A phantom study was conducted to confirm the reliability of the measuring device. The study participants were 26 females with bilateral masseter muscle pain who were classified into either Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) group Ia (myofascial pain; n=13) or RDC/TMD group Ib (myofascial pain with limited opening; n=13)...
February 7, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28187528/ultrastructural-changes-in-human-masseter-muscles-after-botulinum-neurotoxin-a-injection
#8
Fushun Ma, Zhaohui Zhai, Shunwen Zhu, Shengjian Tang
INTRODUCTION: Botulinum neurotoxin A (BoNTA) has long been used as a therapeutic agent and has been widely accepted as a cosmetic agent in recent years. It can inhibit function and induce structural changes in skeletal muscle. METHODS: Specimens of fresh dissected human masseter muscle were used to observe the ultrastructural changes that occurred at 6 and 12 months following BoNTA injection. RESULTS: The findings observed were muscle fiber distortion, sarcomere shortening, mitochondrial vacuolar degeneration, glycogen accumulation, and H and M band disruption in the triad of tubules...
February 10, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28181679/mechanism-of-motor-coordination-of-masseter-and-temporalis-muscles-for-increased-masticatory-efficiency-in-mice
#9
Tomoko Yoshimi, Yoshiyuki Koga, Aya Nakamura, Ayumi Fujishita, Haruka Kohara, Emi Moriuchi, Keiko Yoshimi, Chi-Yang Tsai, Noriaki Yoshida
The demand for the use of mice as animal models for elucidating the pathophysiologies and pathogeneses of oral motor disorders has been increasing in recent years, as more and more kinds of genetically modified mice that express functional disorders of the stomatognathic system become available. However, the fundamental characteristics of mouse jaw movements during mastication have yet to be fully elucidated. The purpose of this study was to investigate the roles of the masseter and temporalis muscles, and the mechanisms of motor coordination of these muscles for increasing masticatory efficiency in the closing phase in mice...
February 9, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28177331/the-role-of-masseter-muscle-emg-during-dise-to-predict-the-effectiveness-of-mad-preliminary-results
#10
M R Marchese, E Scarano, G Rizzotto, C Grippaudo, G Paludetti
The use of a mandibular advancement device (MAD) increases the activity of the temporo-mandibular (TM) complex and masseter (MM) muscles with the risk of reducing treatment compliance. Predictors of treatment outcome are of importance in selecting patients who might benefit from MAD without side effects. The role of mandibular advancement (MA) during drug-induced sleep endoscopy (DISE) is controversial. In three cases (BMI < 30) affected by non-severe OSAS (AHI < 30 e/h), we recorded the surface EMG signal of MM activity during DISE...
December 2016: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28167165/the-use-of-a-custom-made-mouthguard-stabilizes-the-electromyographic-activity-of-the-masticatory-muscles-among-karate-d%C3%A5-athletes
#11
Gilsane Raquel, Eli Luis Namba, Daniel Bonotto, Edvaldo Antônio Ribeiro Rosa, Paula Cristina Trevilatto, Maria Ângela Naval Machado, Michelle Santos Vianna-Lara, Luciana Reis Azevedo-Alanis
AIMS: To analyze and compare the electromyographic activity of the temporal (anterior portion) and masseter muscles among Karate-Dō athletes before and after training, with and without the use of a mouthguard. METHODS: Twenty athletes (14 males and 6 females) with a mean age of 23.7 ± 7.5 years participated. They had surface electromyography recordings taken of their bilateral temporal and masseter muscles before and after training under the following conditions: no mouthguard, with a ready-made mouthguard, and with a custom-made mouthguard...
January 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28163250/pampas-fox-lycalopex-gymnocercus-new-intermediate-host-of-sarcocystis-svanai-apicomplexa-sarcocystidae
#12
Nathalia P Scioscia, Leandro Olmos, Antonella Gorosábel, Lucía Bernad, Julieta Pedrana, Yanina P Hecker, Ignacio Gual, M Laura Gos, Guillermo M Denegri, Dadín P Moore, Gastón Moré
Several Sarcocystis spp. have carnivores as definitive host and sarcocysts are common in muscles of herbivores (intermediate host). However, sarcocysts have been found in muscles of wild and domestic carnivores suggesting they are intermediate host for some Sarcocystis spp. Here, we report mature sarcocysts in the muscles of Pampas fox (Lycalopex gymnocercus). A total of 36 free-living foxes were analyzed. Different skeletal muscles were assessed by microscopic and molecular methods. Cysts and/or DNA of Sarcocystis sp...
February 3, 2017: Parasitology International
https://www.readbyqxmd.com/read/28157491/intravenous-dexamethasone-administration-before-orthognathic-surgery-reduces-the-postoperative-edema-of-the-masseter-muscle-a-randomized-controlled-trial
#13
Harutsugi Abukawa, Takashi Ogawa, Michihide Kono, Toshiyuki Koizumi, Yoko Kawase-Koga, Daichi Chikazu
PURPOSE: Dexamethasone seems to suppress postoperative swelling. However, the standard administration dose of dexamethasone for bilateral sagittal split osteotomy (BSSO) has not been reported. This study focused on clarifying the most effective dose of dexamethasone for BSSO. MATERIALS AND METHODS: This research was planned as a prospective, randomized controlled, double-blind study. Patients undergoing BSSO were randomly assigned to receive intravenous preoperative dexamethasone under 3 different dose conditions: 16 mg, 8 mg, and 0 mg (control)...
January 9, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28153456/perinatal-undernutrition-associated-to-experimental-model-of-cerebral-palsy-increases-adverse-effects-on-chewing-in-young-rats
#14
Diego Cabral Lacerda, Kelli Nogueira Ferraz-Pereira, Diego Bulcão Visco, Paula Brielle Pontes, Wenicius Ferreira Chaves, Omar Guzman-Quevedo, Raul Manhães-de-Castro, Ana Elisa Toscano
The aim of the present study was to investigate the effect of perinatal undernutrition on the sensorimotor pattern of chewing in rats submitted to cerebral palsy experimental model. A total of 60 male Wistar rats were randomly distributed into four groups: Nourished/Control (NC, n=15), Nourished/Cerebral Palsy (NCP, n=15); Undernourished/Control (UC, n=15) and Undernourished/Cerebral Palsy (UCP, n=15). Animals of cerebral palsy (CP) group were subjected to an experimental model based on the combination of perinatal anoxia associated with sensorimotor restriction of the hindlimb...
January 30, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28150182/changes-in-mandibular-movement-during-chewing-of-different-hardness-foods
#15
Marie Komino, Hiroshi Shiga
In order to clarify the change in mandibular movement during chewing of foods with different hardness, 20 healthy subjects were asked to chew 3 types of gummy jellies (containing 6, 8, and 10% gelatin), and the masseter muscular activity and the mandibular movement were recorded. The indicators representing the muscular activity (integral value of masseter muscular activity), the mandibular movement (opening distance, masticatory width, cycle time, opening maximum velocity and closing maximum velocity), and the stability of masticatory movement were calculated, respectively, and compared among the three foods...
February 1, 2017: Odontology
https://www.readbyqxmd.com/read/28149474/treatment-of-chronic-pain-associated-with-nocturnal-bruxism-with-botulinum-toxin-a-prospective-and-randomized-clinical-study
#16
Hessa Al-Wayli
BACKGROUND: To evaluate the role of botulinum toxin type A (BTX-A) in the treatment of pain associated with nocturnal bruxism. MATERIAL AND METHODS: Fifty subjects reporting nocturnal bruxism were recruited for a randomized clinical trial. Twenty five bruxers were injected with botulinum toxin in both masseters, and twenty five were treated with traditional methods of treating bruxism. Patients were evaluated at 3rd week, 2nd and 6th month and one year after injection and then used to calculate bruxism events...
January 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28145597/proprioceptive-mechanisms-in-occlusion-stimulated-masseter-hypercontraction
#17
Xin Liu, Chunkui Zhang, Dongmei Wang, Hongyun Zhang, Xiaodong Liu, Jinlian Li, Meiqing Wang
Neurons in the trigeminal mesencephalic nucleus (Vme) have an axon that branches peripherally to innervate the orofacial region and projects centrally to the trigeminal motor nucleus (Vmo). They function as the primary neurons conveying proprioceptive messages. The present study aimed to demonstrate the presence of a periodontal-Vme-Vmo circuit and to provide evidence for its involvement in an experimental unilateral anterior crossbite (UAC) model, which can induce osteoarthritis in the temporomandibular joint...
February 1, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/28138227/electromyographic-activity-of-masticatory-muscles-in-elderly-women-a-pilot-study
#18
Ewelina Gaszynska, Karolina Kopacz, Magdalena Fronczek-Wojciechowska, Gianluca Padula, Franciszek Szatko
OBJECTIVES: To evaluate the effect of age and chosen factors related to aging such as dentition, muscle strength, and nutrition on masticatory muscles electromyographic activity during chewing in healthy elderly women. BACKGROUND: With longer lifespan there is a need for maintaining optimal quality of life and health in older age. Skeletal muscle strength deteriorates in older age. This deterioration is also observed within masticatory muscles. METHODS: A total of 30 women, aged 68-92 years, were included in the study: 10 individuals had natural functional dentition, 10 were missing posterior teeth in the upper and lower jaw reconstructed with removable partial dentures, and 10 were edontoulous, using complete removable dentures...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28128465/oro-facial-impairment-in-stroke-patients
#19
REVIEW
Martin Schimmel, Takahiro Ono, Otto L T Lam, Frauke Müller
Stroke is considered one of the leading causes of death and acquired disability with a peak prevalence over the age of 80 years. Stroke may cause debilitating neurological deficiencies that frequently result in sensory deficits, motor impairment, muscular atrophy, cognitive deficits and psychosocial impairment. Oro-facial impairment may occur due to the frequent involvement of the cranial nerves' cortical representation areas, central nervous system pathways or motoneuron pools. The aim of this narrative, non-systematic review is to discuss the implications of stroke on oro-facial functions and Oral Health Related Quality of Life (OHRQoL)...
January 27, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28128087/direct-insertion-of-muscle-fibers-is-not-restricted-to-facial-skin
#20
Uwe Wollina
Facial musculature is divided into masticatory muscles, i.e. M. masseter and M. buccalis, with bony insertions and smaller facial muscles involved in facial expression, which insert into bone and skin. There are four fixed osteocutaneous points of the face, i.e. zygomatic (Mac Gregor), mandibular (Furnas), orbital (Psillakis), and masseteric with an antigravitational effect and functional role in facial expression (1,2). In other body parts, the direct insertion of muscle fibers into skin has not been reported...
December 2016: Acta Dermatovenerologica Croatica: ADC
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