What is the lip muscle called?
The muscle around the mouth is called the orbicularis oris. Gray's Anatomy (1918) describes it as a complex sphincter-like muscle surrounding the mouth.
What it is
- A complex sphincter-like muscle surrounding the mouth.
- Closes and purses the lips.
- Essential for speech, whistling, and kissing.
Where it is
- In the substance of the lips.
- Blends at its corners with the other muscles of facial expression.
- Not attached to bone.
Source:
Last verified: 2026-07-18
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