Question
Which division of the facial nerve innervates the muscles located in the lower lip?
| A. |
Temporal
|
| B. |
Cervical
|
| C. |
Buccal
|
| D. |
Mandibular
|
Show Answer
|
Correct Answer � D
Explanation
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|
The division of the facial nerve that innervates the muscles of the lower lip is the mandibular branch. The mandibular branch of the facial nerve is responsible for the movement of muscles in the lower face, including those around the mouth and lips, which are crucial for expressions such as frowning or pouting.
Here’s a brief overview of the other branches and what they generally innervate:
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A. Temporal – This branch innervates muscles around the forehead and upper eyelids.
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B. Cervical – This branch controls the platysma muscle, which is in the neck.
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C. Buccal – This branch innervates the muscles in the upper lip and cheek area, but not primarily responsible for the lower lip.
Thus, the correct answer for which division of the facial nerve innervates the muscles located in the lower lip is:
D. Mandibular
