Discussion:
Physiology
A 50 year-old male complained of weakness on the right half of his face, which quickly led to the facial paralysis of this side. He was unable to wrinkle his forehead, smile, show his teeth. He was also unable to close his right eye. Taste perception was distorted over the left anterior portion of the tongue. There was complete recovery of the facial weakness and taste distortion within two months.
1. Which cranial nerve is involved?
2. Why it causes paralysis on the right?
3. How would you differentiate this condition from other cranial nerves involvement?