Occipitofrontalis Muscle Under the Skin, Anterior View

Description

Beneath the facial skin of an adult male, the frontal belly of the occipitofrontalis (epicranius), the frontalis, spans the anterior scalp over the frontal bone, sitting superficial to the periosteum and blending inferiorly with the eyebrow region. Medially, fibers interdigitate with the procerus and corrugator supercilii at the glabella, while laterally they merge with the orbicularis oculi near the superolateral orbital margin. Superiorly, the muscle thins toward the galea aponeurotica (epicranial aponeurosis), which continues posteriorly toward the occipital belly. Facial expression anatomy, clarified. Functionally, the frontalis elevates the eyebrows and produces transverse forehead rhytids by pulling the scalp anteriorly, a relationship that helps learners distinguish brow elevation from glabellar frown lines driven by corrugator and procerus. This anterior, subcutaneous presentation also aligns with aesthetic and reconstructive practice, where botulinum toxin injection patterns and complication avoidance depend on respecting the frontalis as an elevator and preserving balanced antagonism around the brow to prevent brow ptosis. The superficial plane matters, because frontalis lies within the scalp’s musculoaponeurotic layer and is separated from deeper structures by loose areolar tissue, the same plane that can permit spread of edema or hematoma. Use this artwork in head and neck anatomy teaching blocks, facial expression modules in medical illustration and dentistry curricula, or in surgical and cosmetic training materials discussing brow lift planning, toxin placement, and forehead laceration repair. It also fits well in patient-facing education for explaining dynamic forehead lines and expected changes after neuromodulator treatment. Anatomical accuracy verified by SciePro's Medical Advisory Board.