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The main muscle that pull the edges of the lips superoposteriorly to form the smile is the buccinator.
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Actually, the buccinator is more useful for holding the cheek to the teeth during chewing, (and is also quite useful for Trumpet playing). Although the buccinator does aid a little in smiling, it is primarily the zygomaticus major and risorius muscles that are responsible for a smile :)
What else can I help you with?
How many mucsles do you have in your body?
a lot
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17, not including their vagina mucsles. if it is as big as your moms vagina then they will have 92 total mucsles.
What moves food from the mouth to the stomach?
mucsles
Which mucsles suffer without protein?
ehuihfuhfruehgre
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32 exact
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ALL OF THEM but mostly quads and shoulders
After period you experience cramps three days later what does that mean?
it could just mean that your growing to fast and your mucsles arn't used to your body yet
Artist and song of Celtic music?
their is a song called cockles and mucsles
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To transfer electrical activity to pakinji mucsles
How many mucsles are in a crocodile's body?
ZERO their fishh like nemo -_____-
Which category of hip muscles is primarily responsible for hip adduction?
posterior mucsles
How many mucsles does it take to smile?
This depends on which elements of a smile you are refering to. The act of raising the corners of your mouth is done by three muscles, primarily the zygomaticus major and risorius muscles and aided by the buccinator muscle. If you squint your eyes while you smile you may also use orbicularis oculi. If you scrunch your nose with your smile then you may also use your procerus and nasalis muscle. If your forehead wrinkles and eyebrows raise then your occipitofrontalis helps as well. For someone with a very expressive smile, they are likely using alot of their facial muscles (up to 15, the rest would oppose a smile and cause frowning).
