The proper functioning of this nerve is often assessed by having the patient smile:

Question

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The seventh cranial nerve (VII), also called the facial nerve, is responsible for many functions of the face, including the ability to smile. When this nerve is intact and functioning properly, the patient should be able to smile symmetrically. Therefore, assessing the patient's ability to smile is commonly used to evaluate the function of the facial nerve.

The Proper Functioning of This Nerve Is Often Assessed by Having