Name 5 muscles which are affected and list its actions
- Frontalis: Draws scalp anteriorly, raises eyebrows, and wrinkles skin of forehead horizontally as in look of surprise
- Orbicularis Oculi: Closes and protrudes lips, as in kissing; compresses lips against teeth; and shapes lips during speech.
- Orbicularis Oris: Closes eyes.
- Buccinator: Maintains the tightness of the cheeks and presses them against the teeth during chewing.
- Platysma: Contributes to the production of a myriad of facial expressions.
Other symptoms that the patient can experience include the following:
- Pain around the jaw or pain in or behind the ear on the affected side
- Increased sensitivity to sound
- Headache
- Loss of taste
- Changes in the amount of tears and saliva produced
References:
Taylor, D. C. (2021, May 4). Bell Palsy: Practice Essentials, background, anatomy. Retrieved September 8, 2023, from https://emedicine.medscape.com/article/1146903-overview#:~:text=These%20nerves%20serve%20the%20muscles,%2C%20buccinator%2C%20and%20platysma%20muscles.
Warner, M. J. (2023, August 17). Bell Palsy. StatPearls - NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK482290/#:~:text=Bell%20palsy%20is%20thought%20to,occur%20in%20the%20labyrinthine%20segment.