Depressor anguli oris

Dr Dan J Bell et al.

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

Summary

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

Article information

rID: 55052
System: Head & Neck
Section: Anatomy
Synonyms or Alternate Spellings:
  • triangularis

Support Radiopaedia and see fewer ads

Updating… Please wait.
Loadinganimation

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.