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Facial anatomy
Published in Michael Parker, Charlie James, Fundamentals for Cosmetic Practice, 2022
The corrugator supercilii muscles (colloquially known as the corrugators) arise from the medial aspect of the supraorbital ridge (the superior bony border of the orbit) and their fibres extend superiorly between the orbicularis oculi muscles before attaching in the deep tissues immediately superior to the midline of the supraorbital ridge. Regarding the relevant local musculature, the corrugators can be found lateral to the procerus, inferior to the frontalis and superior to the orbicularis oculi muscles (Figure 3.15).
Anatomical Considerations to Improve Aesthetic Treatments Using Neuromodulators
Published in Yates Yen-Yu Chao, Optimizing Aesthetic Toxin Results, 2022
Nicholas Moellhoff, Sebastian Cotofana
The corrugator supercilii muscle is often injected at its dermal insertion at the upper border of the middle eyebrow. Placement of neuromodulator injections above the eyebrow can cause eyebrow ptosis due to relaxation of the frontalis muscle, which is responsible for eyebrow elevation. In addition, injecting the procerus muscle too far cranially, i.e. at the horizontal glabellar line, which does not correspond with the bony origin of the muscle, may also weaken the medial fibers of the frontalis muscle, leading to medial eyebrow ptosis.
Forehead
Published in Ali Pirayesh, Dario Bertossi, Izolda Heydenrych, Aesthetic Facial Anatomy Essentials for Injections, 2020
Izolda Heydenrych, Fabio Ingallina, Thierry Besins, Shannon Humphrey, Steven R. Cohen, Ines Verner
Corrugator supercilii originates at the superome-dial aspect of orbital rim along the nasal process of the frontal bone. It has transverse and oblique bellies. The latter may have a narrow rectangular or broader triangular shape. The two bellies course superolaterally from their origin, passing through fibers of frontalis to reach the dermis at the mid-brow. The superficial and deep branches of the supraorbital nerve are intimately related to corrugator supercilii at its origin. Corrugator supercilii approximates and depresses the brow. Over time, contraction of this muscle creates vertical rhytides at the brow level.
The Predictive Validity of Explicit and Implicit Partner Evaluations for Relationship Behaviors: An Actor–Partner Interdependence Analysis
Published in Journal of Personality Assessment, 2020
A human smile is characterized by increases in the activity of the zygomaticus major (the muscle that elevates the corners of the mouth) and by decreases in the activity of the corrugator supercilii (the muscle that knits the eyebrows; Cacioppo, Petty, Losch, & Kim, 1986). Thus, we recorded muscular activity of the zygomaticus and the corrugator muscles. We did so by placing two electrodes on the corresponding muscle sites in line with Fridlund and Cacioppo’s (1986) guidelines and one electrode on the forehead as a common reference. We used bipolar, 4 mm standard nonpolarizing silver/silver chloride surface electrodes and assessed the signal with a digital Psychlab amplifier (Contact Precision Instruments, Boston, MA) at a sampling frequency of 1000 Hz. Offline, the fEMG raw signal was filtered with a 30-Hz low cutoff filter and a 300-Hz high cutoff filter as well as a notch filter at 50 Hz to remove the power line hum. Due to technical difficulties with the recording device, data were missing for 28 participants (13 women, 15 men). For each muscle, we aggregated muscular activity from 1,001 ms to 4,000 ms after stimulus onset, because fEMG reactions to picture cues usually come with a delay of approximately 1 s (Dufner et al., 2015). To control for baseline muscular activity, we partialed out activity during fixation-cross presentation from mean activity during picture presentation. We computed positive reactivity scores by aggregating responses for the zygomaticus and corrugator muscles and then subtracting corrugator activity from zygomaticus activity (cf. Dufner et al., 2015).
Affective Responses to Gay Men Using Facial Electromyography: Is There a Psychophysiological “Look” of Anti-Gay Bias
Published in Journal of Homosexuality, 2019
Melanie A. Morrison, Krista M. Trinder, Todd G. Morrison
Given that, to date, only one published study exists that uses facial EMG to address sexual orientation bias (indicated in this case by collective action or antidiscrimination), we build on Stewart et al.’s (2013) work by testing the utility of facial EMG as a means of detecting interpersonal bias toward gay men. We also address extant limitations associated with this pioneering work, and those affiliated with facial EMG studies more generally. Specifically, unlike Stewart et al. (2013), we include recordings from both the corrugator supercilii, which is active when frowning, and the zygomaticus major, which is active when smiling. Drawing on recordings from both muscle sites enables us not only to detect negative affective responses but also to account for the presence of positive affective responses to gay men should they appear.
A personalized treatment approach of frontalis muscle with botulinum toxin A (Bont-A) related to functional anatomy: case studies
Published in Journal of Cosmetic and Laser Therapy, 2020
The frontalis muscle is the only muscle in the upper face able to raise the eyebrow and eyelid during the contraction phase. Its action is antagonist to the action of the muscles of the glabella complex (corrugator supercilii, procerus) and orbicularis oculii. Therefore, the paretic treatment of frontalis muscle may not only reduce the horizontal forehead lines but also affect the position and shape of the eyebrow, the eyelid, and the height of the forehead (3). The occipitofrontalis muscle comprises an anterior frontal belly and a posterior occipital belly, joined through the galea aponeurotica.