The risorius muscle is a facial muscle that is activated with smiling or grimacing.
True. The risorius muscle is indeed a facial muscle that runs from the corner of the mouth to the cheek. It is activated with actions like smiling or grimacing.
It is one of the many facial muscles responsible for various expressions and movements in the face, working in conjunction with muscles like the orbicularis oris and zygomaticus.
This muscle's function highlights the intricate network of muscles in the face that allow for a wide range of facial expressions and movements.
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