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Which cranial nerve(s) does not innervat...

Which cranial nerve(s) does not innervate the taste buds but helps in movement of tongue during speech and swallowing?

A

Facial

B

Glossopharyngeal

C

Hypoglossal

D

Vagus

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question of which cranial nerve does not innervate the taste buds but helps in the movement of the tongue during speech and swallowing, we can follow these steps: ### Step 1: Identify the cranial nerves listed in the options The options provided are: 1. Facial nerve 2. Glossopharyngeal nerve 3. Hypoglossal nerve 4. Vagus nerve ### Step 2: Understand the function of each cranial nerve - **Facial nerve (VII)**: This nerve is responsible for taste sensations from the anterior two-thirds of the tongue and also controls facial expressions. - **Glossopharyngeal nerve (IX)**: This nerve provides taste sensations from the posterior one-third of the tongue and is involved in swallowing. - **Hypoglossal nerve (XII)**: This nerve primarily controls the movements of the tongue and does not have a role in taste sensation. - **Vagus nerve (X)**: While it has various functions, it is not primarily responsible for taste but does have some involvement in swallowing. ### Step 3: Determine which nerve does not innervate taste buds From the analysis: - The **Hypoglossal nerve** does not innervate taste buds. Its primary function is to control the movement of the tongue. ### Step 4: Confirm the role of the Hypoglossal nerve The Hypoglossal nerve is known as the 12th cranial nerve. It originates from the brainstem and innervates the muscles of the tongue, facilitating movements necessary for speech and swallowing. ### Final Answer The cranial nerve that does not innervate the taste buds but helps in the movement of the tongue during speech and swallowing is the **Hypoglossal nerve (C)**. ---
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