Levator labii superioris alaeque nasi muscle
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The Levator labii superioris alaeque nasi muscle is, translated from Latin, the "lifter of the upper lip and of the wing of the nose". It is the muscle with the longest name in the human body.
Attachment
The muscle is attached to the upper frontal process of the maxilla and inserts into the skin of the lateral part of the nostril and upper lip.
Action
It dilates the nostril and elevates the upper lip, enabling one to snarl. Elvis Presley is famous for his use of this facial expression, earning the muscle this nickname "The Elvis muscle".
Innervation
The muscle is innervated by the buccal branch of facial nerve, CN VII.ja:上唇鼻翼挙筋