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Head Muscles
Muscle Actions
Term | Definition |
---|---|
occipitofrontalis | moves scalp & eyebrows; wrinkles skin of forehead |
obicularis oculi | closes eye; produces winking, blinking, and squinting |
epicranius | scalp muscle |
obicularis oris | compresses and purses lips (kiss) |
zygomaticus major | elevates corners of mouth (smile) |
depressor anguli oris | draws corners of mouth inferiorly and laterally (frown) |
levator labii superioris | opens lips; raises and furrows the upper lip |
depressor labii inferioris | draws lower lip inferiorly |
nasalis | compresses bridge and depresses tip of nose; elevates corners of nostrils |
buccinator | compresses cheek, holds food between teeth during chewing |
masseter | elevates and protracts mandible; prime mover of mandible elevation |
medial pterygoid | elevates and protracts mandible; produces side to side movement of mandible |
lateral pterygoid | protracts mandible; produces side-to-side movement of mandible |
temporalis | elevates and retracts mandible |
mentalis | protudes lower lip, wrinkles chin (pout) |