Anterior Perspective of the Corrugator Supercilii Muscle Under the Skin

Description

Prominent in the superomedial orbit, the corrugator supercilii sits deep to the medial eyebrow, arising from the medial end of the superciliary arch of the frontal bone and running superolaterally to blend with the dermis of the eyebrow skin. From an anterior perspective with partial skin removal, adjacent expression muscles are logically visible, including the frontal belly of occipitofrontalis superiorly and orbicularis oculi encircling the palpebral fissure, with the procerus and nasalis lying inferior and medial along the nasal bridge. Lateral facial landmarks such as zygomaticus major and minor, masseter over the mandibular ramus, and orbicularis oris around the mouth frame the corrugator’s position in the upper face. Fiber direction matters. Contraction of corrugator supercilii draws the eyebrow medially and inferiorly, producing vertical glabellar rhytids, the classic frown lines that help distinguish corrugator activity from the transverse forehead lines driven by frontalis. That distinction guides targeted chemodenervation in aesthetic and headache practice, where botulinum toxin is often placed at the medial brow while respecting the nearby levator palpebrae superioris and avoiding diffusion that can cause iatrogenic upper eyelid ptosis. An anterior dissection-style view also helps teach the layered anatomy that surgeons and injectors navigate, from skin and subcutaneous tissue to the superficial musculoaponeurotic system and periosteum at the glabella. Ideal for gross anatomy lab manuals, facial anatomy lectures in medical and dental curricula, and chapters on muscles of facial expression in plastic surgery, dermatology, and otolaryngology publications. It also supports patient-facing materials explaining glabellar botulinum toxin injection mapping and expected expression changes. Anatomical accuracy verified by SciePro's Medical Advisory Board.