- May 2, 2026The depressor labii inferioris depresses and everts the lower lip, exposing the lower teeth and inner lip mucosa. It works…
- May 2, 2026The procerus is a small pyramidal muscle at the bridge of the nose that pulls the medial eyebrow downward to…
- May 2, 2026The nasalis has two functionally opposite parts: the transverse compressor narrows the nasal aperture during forced exhalation and expressive nose…
- May 2, 2026The depressor septi nasi pulls the nasal base and septum downward during animation, producing the tip droop during smiling that…
- May 2, 2026The genioglossus is the largest extrinsic tongue muscle and the primary protruder of the tongue. Its fan-shaped attachment from the…
- May 2, 2026The hyoglossus is a flat, quadrilateral muscle connecting the hyoid bone to the lateral tongue, depressing and retracting the tongue…
- May 2, 2026The styloglossus arises from the elongated styloid process of the temporal bone and retracts the tongue posteriorly while curling its…
- May 2, 2026The buccinator is the muscle of the cheek, forming the muscular wall of the buccal vestibule and maintaining food between…
- May 2, 2026The risorius is a variable and inconsistent muscle present in approximately 50 percent of people, pulling the mouth corner laterally…
- May 2, 2026The mentalis is the primary muscle of chin expression, producing the characteristic cobblestone or dimpled chin appearance of uncertainty, pouting,…