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The Temporalis Muscle , one of the largest chewing muscles, is a fan-shaped muscle located in the temporal fossa . It controls the elevation of the lower jaw ( mandible ) and chewing movements.AnatomyMorphology and Connection PointsThe Temporalis Muscle is a fan-shaped, superficial chewing muscle that occupies a large area on the lateral surface of the skull. It originates from the temporal fossa of the temporal bone and the overlying temporal fascia. Its fibers extend from above to the tempor

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 StructureMorphology and Attachment PointsThe risorius muscle is a thin, superficial muscle exhibiting significant anatomical variation. Its str