- April 28, 2026The nasalis has two functionally opposite parts: the transverse compressor narrows the nasal aperture during forced exhalation and expressive nose…
- April 28, 2026The zygomaticus major is the primary smiling muscle, running obliquely from the cheekbone to the corner of the mouth and…
- April 28, 2026The orbicularis oris is a complex elliptical muscle surrounding the mouth, built from contributions of the buccinator posteriorly and the…
- April 28, 2026The orbicularis oculi is the sphincter muscle of the eyelid, forming an elliptical ring around the orbit divided into orbital,…
- April 28, 2026The frontalis is the forehead muscle, the only elevator of the eyebrow, running from the galea aponeurotica to the eyebrow…
- April 28, 2026The corrugator supercilii is a small pyramidal muscle under the medial frontalis, pulling the eyebrow medially and downward to create…
- April 28, 2026The depressor anguli oris is a triangular muscle pulling the corner of the mouth downward, the antagonist of the zygomaticus…
- April 28, 2026The buccinator is the muscle of the cheek, forming the muscular wall of the buccal vestibule and maintaining food between…
- April 28, 2026The risorius is a variable and inconsistent muscle present in approximately 50 percent of people, pulling the mouth corner laterally…
- April 28, 2026The mentalis is the primary muscle of chin expression, producing the characteristic cobblestone or dimpled chin appearance of uncertainty, pouting,…