Orbicularis oris muscle
In human anatomy, the orbicularis oris muscle is a complex of muscles in the lips that encircles the mouth. It is not a true sphincter, as was once thought, as it is actually composed of four independent quadrants that interlace and give only an appearance of circularity.
| Orbicularis oris | |
|---|---|
| Details | |
| Origin | Maxilla and mandible |
| Insertion | Skin around the lips |
| Artery | Inferior labial artery and superior labial artery. |
| Nerve | cranial nerve VII, buccal branch |
| Actions | It is sometimes known as the kissing muscle because it is used to pucker the lips. |
| Identifiers | |
| Latin | musculus orbicularis oris |
| TA98 | A04.1.03.023 |
| TA2 | 2073 |
| FMA | 46841 |
| Anatomical terms of muscle | |
It is also one of the muscles used in the playing of all brass instruments and some woodwind instruments. This muscle closes the mouth and puckers the lips when it contracts.
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