Orbicularis Oris

Examples of Orbicularis Oris in the following topics:

• Facial Muscles

  • Orbicularis Oculi – A thin muscle that surrounds the eye socket.
  • Orbicularis Oris - Muscle fibers that enclose the opening to the oral cavity.
  • Attachments - It originates from upper and lower jaw and attaches to the lips and orbicularis oris.
  • The levator anguli oris (caninus) inserts at the corners of the mouth at an angle, and is associated with other muscles including the zygomaticus, triangularis, and orbicularis oris.
  • The risorius muscle is lateral to the orbicularis oris and inserts into the angle of the mouth.

• How Skeletal Muscles Are Named

  • The orbicularis oris which controls the opening of the mouth is an example of a circular muscle.

• Overview of Motor Integration

• The Facial Feedback Hypothesis

  • To this end, participants held a pen in their mouth in one of three ways: the Lip position would contract the orbicularis oris muscle, resulting in a frown; the Teeth position would contract the zygomaticus major or the risorius muscle, resulting in a smile; and the control group would hold the pen in their non-dominant hand.

• Facial (VII) Nerve

  • In an upper motor neuron lesion, called central seven (central facial palsy), only the lower part of the face on the contralateral side will be affected due to the bilateral control to the upper facial muscles (frontalis and orbicularis oculi).
  • This is due to the facial nerve's innervation of the muscles of facial expression, namely the orbicularis oculi, responsible for blinking.

• Defective Nouns

  • .: as, cor, lūx, sōl, aes, ōs (ōris), rūs, sāl, tūs.

• Third Declension