Name
Pronunciation
(ri-sor-E-us)
Origin/Proximal Attachment
From parotid fascia over maseter muscle.
Insertion/Distal Attachment
Into the skin at the angle of the mouth
Action/Relevance
Retracts the angle of the mouth
Innervation
Buccal branch of the facial nerve
Notes
Risorius is one of the muscles of facial expression. Bilaterally, it arises from deep fascia of the parotid gland. Passing anteriorly, it inserts into the modiolus and the skin at the angle of the mouth.