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The risorius is a facial muscle primarily responsible for drawing the corners of the mouth laterally, contributing to expressions of amusement or sarcasm. It helps create a wide smile or a smirk, enhancing facial expressions during social interactions. Additionally, the risorius assists in the movement of the cheeks, playing a role in oral functions like chewing and speaking. Overall, its actions are important for nonverbal communication.

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2mo ago

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