Anatomy
Origin:
Infra-orbital margin of maxilla.
Insertion:
Skin of upper lateral half of upper lip.
Key Relations:
Fibres run inferomedially and merge with orbicularis oris.
Functions
Raises upper lip and forms the nasolabial furrow.
e.g. during sadness..
Supply
Nerve Supply:
Buccal branch of the facial nerve (CN 7).
Blood Supply:
Superior labial branch of the facial artery.
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