Origin: Parotid fascia

Insertion: Modiolus

Artery: Facial artery

Nerve: Buccal branch of the facial nerve

Action: Draw back angle of mouth

The Risorius arises in the fascia over the Masseter and, passing horizontally forward, superficial to the Platysma, is inserted into the skin at the angle of the mouth. It is a narrow bundle of fibers, broadest at its origin, but varies much in its size and form.

This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from



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