Levator Anguli Oris

Levator anguli oris Definition

It is a muscle responsible for elevating the angle of mouth. It is connected with the nerve known as buccal branch. This facial muscle receives fresh oxygenated blood from the facial artery network.

Levator anguli oris Location

This muscle arises from the Canine Fossa, just below the infraorbital foramen. Its fibers are inserted into the angle of the mouth and intermingle with those of the Orbicularis oris, Triangularis and Zygomaticus. It originates from the maxilla bone and enters into a chiasma of muscle which is found near the corners of the mouth. Thus, there are two levator anguli oris muscles, both of which are located on either side of the mouth. The muscle moves from deep to superficial level to insert into the lateral edge of the upper lip and into the modiolus.

Levator anguli oris Function

This muscle functions to elevate the angle of the mouth at the corner. It assists in nonverbal communication. It helps the face to make the most common expressions, such as the smile. The corners of the mouth move upward when both the levator anguli oris muscles work together.

Levator anguli oris Disorders

Conditions that affect this muscle include:

  • Stroke
  • Myopathy
  • Myalgia
  • Tears
  • Myositis
  • Strains
  • Atrophy
  • Contusions
  • Neuromuscular diseases

Such problems give rise to various symptoms, such as:

  • Pain in the cheek muscle
  • Reduced movement of the mouth
  • Paralysis of the facial muscles
  • Fever
  • Bleeding
  • Inflammation
  • Muscular spasms
  • Muscular weakness

A sufferer may also experience loss of muscle control in the mouth.

Levator Anguli Oris Pictures

Take a peek at these pictures to understand the location and function of this muscle.

Picture of Levator Anguli Oris

Picture 1 - Levator Anguli Oris

Image of Levator Anguli Oris

Picture 2 - Levator Anguli Oris Image

 

References:

http://health.yahoo.net/human-body-maps/levator-anguli-oris

http://www.gpnotebook.co.uk/simplepage.cfm?ID=-160759731

http://www.rightdiagnosis.com/organ/levator_anguli_oris.htm

http://en.wikipedia.org/wiki/Levator_anguli_oris

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