Espiral AtlasOrbicularis oris muscle
musculus orbicularis oris
Closes the oral fissure; phasic contraction compresses and protrudes the lips (kiss) or resists distension (when blowing). It is the sphincter of the mouth, the first of the series of sphincters of the digestive tube; it matters in the articulation of speech.
In the full entry
The full entry, with every field, sources, quiz and clinical correlations, is in the atlas.
- Origin
- Insertion
- Innervation
- Blood supply
Related clinical cases
- Paralysis of the muscles of the face (Bell's palsy)