Anatomy
Origin:
Fascia over the masseter muscle.
Insertion:
Skin at the corner of the mouth.
Key Relations:
Thin superficial muscle in the upper group of oral muscles.
Functions
Pulls the corner of the mouth laterally and upwards.
e.g. when grinning..
Supply
Nerve Supply:
Buccal branch of the facial nerve (CN 7).
Blood Supply:
Superior labial branch of the facial artery.
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