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EquiFACS: The Equine Facial Action Coding System

Fig 1

The facial muscles of the horse.

NB. Levator labii superioris a.n. represents the levator labii superioris alaeque nasi, which is often also called the levator nasolabialis. Synonyms for the levator annuli oris fascialis muscle include the dilator nares muscle and the caninus muscle. The frontoscutularis has a frontal and a temporal arm.

Fig 1

doi: https://doi.org/10.1371/journal.pone.0131738.g001