Human Facial Muscle Anatomy Diagram - Orbital and Masticatory Muscles #258149 (License: Personal Use)

This vintage-style anatomical drawing presents a sagittal view of the human face, revealing layered musculature including the orbicularis oculi (eye closure), zygomaticus (smiling), masseter and temporalis (jaw movement), and quadratus labii superioris (upper lip elevation). Fine hatching illustrates muscle fiber direction and depth, while labeled structures emphasize functional anatomy relevant to plastic surgery, neurology, and dentistry. The illustration also includes the maxillary sinus and surrounding connective tissue for contextual orientation.

Used in medical textbooks, anatomy courses, otolaryngology or maxillofacial surgery resources, and educational websites targeting students, clinicians, or researchers seeking visual reference for facial neuromuscular function and surgical landmarks.