A 28-year-old woman at 19 weeks of pregnancy complains of acute onset of numbness of the right cheek and drooping of the right face that occurred over 1 hour. She denies trauma to the head. On examination, the patient has difficulty closing her right eyelid, and her right nasolabial fold is smoother than on the left. She also is drooling from the right side of her mouth. The remainder of the neurological examination is normal. What is the anatomical mechanism for this condition?

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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A 28-year-old woman at 19 weeks of pregnancy complains of acute onset of numbness of the 
right cheek and drooping of the right face that occurred over 1 hour. She denies trauma to the 
head. On examination, the patient has difficulty closing her right eyelid, and her right nasolabial 
fold is smoother than on the left. She also is drooling from the right side of her mouth. The 
remainder of the neurological examination is normal. 

What is the anatomical mechanism for this condition? 

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