Attachment: Upper frontal process of the maxilla and inserts into the skin of the lateral part of the nostril and upper lip.
Action: Dilates nostril and elevates the upper lip.
Innervation: Buccal branch of facial nerve, CN VII. One of your kissing muscles.

The muscle with the longest name in the human body. Also one of the muscles of facial expression.

You use this muscle when you snarl.

The Latin name of this muscle means:

"Lifter of the upper lip and of the wing of the nose".

You're saying to yourself, "But my nose has no wing!"
And I reply: Consider yourself lucky. The word ala can also mean armpit!

Aid to memory: http://humanum.arts.cuhk.edu.hk/Lexis/Latin/

The name of this muscle has allegedly been used when doctors have been asked to say Grace in Latin

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