The Orbicularis Oris is a circular muscle around the mouth that closes
and compresses the
lips.
It is not a sphincter muscle, but consists of numerous strata of muscle
fibres, having different directions, which surround the orifice of the
mouth.
This muscle is described in much further detail in reference
[66].
This is one of the muscles of the head, neck, and face that is included
on the syllabus of many courses in Indian
Head Massage. As this is an increasingly popular therapy we have
added several revision pages that may be helpful to students of Indian
Head Massage. See for example, the page about Skeletal
Structures of the Head and Neck.
To view the location of the orbicularis
oris
muscles, see the page about Facial
Muscles.
Note that this page consists of an interactive (rather than a simply
labelled) diagram, so you'll have to test yourself by guessing which
muscles are the orbicularis
oris until
you find the correct label. It's a fun way to learn !
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