Activity 4
|
Muscles Affected |
Action |
|
Platysma |
Draws outer part of lower lip inferiorly and posteriorly as in pouting; depresses mandible. |
|
Orbicularis oculi |
Closes eye. |
|
Buccinator |
Maintains cheek stiffness and forces cheeks against teeth while eating. |
|
Occipitofrontalis |
Moves the scalp forwards, and the frontalis part lifts the brows and moves the anterior scalp backward. |
|
Orbicularis oris |
Closes and protrude lips. |
Describe the Mechanism of his muscle Weakness:
Bell's palsy is a neurological condition characterized by the partial paralysis or weakening of facial muscles on a single side. This condition arises when one of the facial nerves is either damaged or malfunctions.
Symptoms include:
- Sudden weakness or paralysis on one side of your face
- A drooping eyebrow and mouth
- Drooling from one side of your mouth
- Difficulty closing an eyelid, which causes eye dryness
References:
Oliver, K. A. Ashurst, J. (2023, July 24) Anatomy, Thorax, Phrenic Nerves. National Library of Medicine.
Tortora, G. J. (2018, May 15). Principles of anatomy and physiology. Google Books.
https://books.google.com/books/about/Principles_of_Anatomy_and_Physiology.html?id=aSaVDwAAQBAJ
Bell’s Palsy. National Institute of Neurological Disorders. 9000 Rockville Pike, Bethesda, Md, 20892
https://www.ninds.nih.gov/health-information/disorders/bells-palsy#toc-what-is-bell-s-palsy-