Examples of Orbicularis
Oculi in the following topics:
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- 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.
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- Orbicularis
Oculi – A thin muscle that surrounds the eye socket.
- Corrugator
Supercilii - A small muscle located superiorly to the orbicularis oculi.
- 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 risorius muscle is lateral to the orbicularis oris and inserts into
the angle of the mouth.
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- The orbicularis oris which controls the opening of the mouth is an example of a circular muscle.
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- 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.