Muscles of the Head

Muscles of the Head - Muscles of the Head & Neck: -...

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Muscles of the Head & Neck: - orbicularis oris o origin: muscle fibers surrounding mouth opening o insertion: skin at corner of mouth o action: closes & protrudes lips (assists in speech) - o origin: zygomatic bone o minor) o action: z. major draws mouth superiorly & laterally (smiling & laughing); z. minor raises upper lip - buccinator o o insertion: orbicularis oris o action: presses cheeks against teeth & lips (whistling & blowing); draws corner of mouth laterally; assists in chewing - platysma o o o mandible - orbicularis oculi o origin: medial wall of orbit o insertion: circular path around orbit o action: closes eye - muscles that move eyeballs
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This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

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Muscles of the Head - Muscles of the Head & Neck: -...

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