scholarly journals Why we should be avoiding periorificial mimetic muscles when injecting tissue fillers

2020 ◽  
Vol 19 (8) ◽  
pp. 1846-1850
Author(s):  
Greg J. Goodman ◽  
Firas Al‐Niaimi ◽  
Cara McDonald ◽  
Antoinette Ciconte ◽  
Catherine Porter
Keyword(s):  
Mimetic Muscles

scholarly journals Advanced Statistical Analysis of 3D Kinect Data: Mimetic Muscle Rehabilitation Following Head and Neck Surgeries Causing Facial Paresis

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 103
Author(s):  
Jan Kohout ◽  
Ludmila Verešpejová ◽  
Pavel Kříž ◽  
Lenka Červená ◽  
Karel Štícha ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Functional Data ◽  
Muscle Function ◽  
Evaluation Process ◽  
Multiple Logistic Regression ◽  
Facial Paresis ◽  
Kinect Camera ◽  
3D Camera ◽  
Mimetic Muscles ◽  
Data Analytic

An advanced statistical analysis of patients’ faces after specific surgical procedures that temporarily negatively affect the patient’s mimetic muscles is presented. For effective planning of rehabilitation, which typically lasts several months, it is crucial to correctly evaluate the improvement of the mimetic muscle function. The current way of describing the development of rehabilitation depends on the subjective opinion and expertise of the clinician and is not very precise concerning when the most common classification (House–Brackmann scale) is used. Our system is based on a stereovision Kinect camera and an advanced mathematical approach that objectively quantifies the mimetic muscle function independently of the clinician’s opinion. To effectively deal with the complexity of the 3D camera input data and uncertainty of the evaluation process, we designed a three-stage data-analytic procedure combining the calculation of indicators determined by clinicians with advanced statistical methods including functional data analysis and ordinal (multiple) logistic regression. We worked with a dataset of 93 distinct patients and 122 sets of measurements. In comparison to the classification with the House–Brackmann scale the developed system is able to automatically monitor reinnervation of mimetic muscles giving us opportunity to discriminate even small improvements during the course of rehabilitation.

scholarly journals Intraoral Dissection of the Mimetic Muscles: Application to Dentistry and Oral Surgery

Cureus ◽  
2017 ◽  
Author(s):  
Joe Iwanaga ◽  
Koichi Watanabe ◽  
Jingo Kusukawa ◽  
Rod J Oskouian ◽  
R. Shane Tubbs
Keyword(s):  
Oral Surgery ◽  
Mimetic Muscles

Tongue Representation in the Lateral Cortical Motor Region of the Human Brain as Assessed by Transcranial Magnetic Stimulation

2003 ◽  
Vol 112 (1) ◽  
pp. 71-76 ◽  
Author(s):  
Ralph M. W. Rödel ◽  
Rainer Laskawi ◽  
Holger Markus
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Magnetic Stimulation ◽  
Muscle Activation ◽  
Motor Evoked Potentials ◽  
Contralateral Side ◽  
Lower Lip ◽  
Somatotopic Organization ◽  
Head Surface ◽  
The Face ◽  
Mimetic Muscles

Motor evoked potentials (MEPs) of the lingual muscles elicited by focal cortical transcranial magnetic stimulation (TMS) with a figure 8-shaped coil were investigated in 17 healthy subjects with special regard to amplitude and onset latency as a function of the coil position on the head surface. Bilateral reproducible responses could be observed at coil positions mostly varying from approximately 6 to 13 cm lateral to the vertex. During moderate muscle activation, maximum responses were obtained at a mean stimulus position of about 11 cm lateral and 3 cm anterior to the vertex with similar onset latencies, but with significantly higher amplitudes on the contralateral side (3.5 ± 1.9 mV, 9.5 ± 1.1 ms contralateral; 2.6 ± 1.5 mV, 9.7 ± 1.0 ms ipsilateral). Comparing our data on the orbicularis oculi muscle with the results obtained on lower lip muscles, we found a considerable overlap of those coil positions from which reproducible MEPs could be elicited in both groups of target muscles, but the lingual area was placed more laterally. Thus, a statistically significant separation of the cortical representation areas of lingual and lower lip mimetic muscles is possible by focal cortical TMS, reflecting somatotopic organization of the face-associated motor cortex.

scholarly journals Muscles of Facial Expression in Extinct Species of the Genus Homo

2016 ◽  
Author(s):  
Arturo Tozzi
Keyword(s):  
Facial Expression ◽  
General Trend ◽  
Homo Sapiens ◽  
Anatomical Variation ◽  
Homo Erectus ◽  
Human Species ◽  
Homo Neanderthalensis ◽  
Genus Homo ◽  
Levator Labii Superioris ◽  
Mimetic Muscles

ABSTRACTWe display a detailed description of mimetic muscles in extinct human species, framed in comparative and phylogenetic contexts. Using known facial landmarks, we assessed the arrangement of muscles of facial expression in Homo sapiens, neanderthalensis, erectus, heidelbergensis and ergaster. In modern humans, several perioral muscles are proportionally smaller in size (levator labii superioris, zygomaticus minor, zygomaticus major and triangularis) and/or located more medially (levator labii superioris, zygomaticus minor and quadratus labii inferioris) than in other human species. As mimetic musculature is examined in the most ancient specimens up to the most recent, there is a general trend towards an increase in size of corrugator supercillii and triangularis. Homo ergaster’s mimetic musculature closely resembles modern Homo, both in size and in location; furthermore, Homo erectus and Homo neanderthalensis share many muscular features. The extinct human species had an elaborate and highly graded facial communication system, but it remained qualitatively different from that reported in modern Homo. Compared with other human species, Homo sapiens clearly exhibits a lower degree of facial expression, possibly correlated with more sophisticated social behaviours and with enhanced speech capabilities. The presence of anatomical variation among species of the genus Homo raises important questions about the possible taxonomic value of mimetic muscles.

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