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Which nerve innervates the muscles of mastication?

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Question: Which nerve innervates the muscles of mastication?

Options:

  1. Facial nerve (CN VII)
  2. Trigeminal nerve (CN V)
  3. Glossopharyngeal nerve (CN IX)
  4. Vagus nerve (CN X)

Correct Answer: Trigeminal nerve (CN V)

Solution: 

The trigeminal nerve (CN V) innervates the muscles responsible for mastication.

Which nerve innervates the muscles of mastication?

Practice Questions

Q1
Which nerve innervates the muscles of mastication?
  1. Facial nerve (CN VII)
  2. Trigeminal nerve (CN V)
  3. Glossopharyngeal nerve (CN IX)
  4. Vagus nerve (CN X)

Questions & Step-by-Step Solutions

Which nerve innervates the muscles of mastication?
  • Step 1: Understand what mastication means. Mastication is the process of chewing food.
  • Step 2: Identify the muscles involved in mastication. These muscles include the masseter, temporalis, and pterygoid muscles.
  • Step 3: Learn about the nerves in the body. Nerves send signals to muscles to help them move.
  • Step 4: Find out which nerve is responsible for the muscles of mastication. This is the trigeminal nerve.
  • Step 5: Confirm that the trigeminal nerve is also known as cranial nerve V (CN V).
  • Step 6: Conclude that the trigeminal nerve (CN V) innervates the muscles responsible for mastication.
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