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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) |