depressor anguli oris muscle

The depressor anguli oris muscle (also known as the triangularis muscle) is one of the muscles of facial expression.

Summary

• origin: oblique line of the mandible
• insertion: 
  • ​angle of the mouth
  • superficial fibers from both sides merge to form the transversus menti
• innervation: facial nerve
• action: 
  • depresses the angle of the mouth, e.g. frowning

Siehe auch:

• Mimische Muskulatur

und weiter:

• Gesichtsmuskeln