`anatomical-variations` Related Article Results

Risorius muscle is a highly variable facial muscle involved in facial expressions. It attaches to the modiolus at the corner of the mouth and contributes to the formation of expressions such as smiling, grinning, and laughing. It is innervated by the buccal branch of the facial nerve (CN VII) and may be asymmetric or absent in some individuals. Anatomical Structure Morphology and Attachment Points The risorius muscle is a thin, superficial muscle exhibiting significant anatomical variation. Its