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The IV cranial nerve is...

The IV cranial nerve is

A

oculomotor

B

trochlear

C

olfactory

D

facial

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Cranial Nerves**: Cranial nerves are a set of 12 nerves that originate from the brain. Each of these nerves has specific functions related to sensory and motor activities. 2. **Identifying the IV Cranial Nerve**: The question specifically asks for the IV cranial nerve. We need to identify which nerve this is among the options provided: oculomotor, trochlear, olfactory, and facial. 3. **Listing the Cranial Nerves**: The first step is to recall the names and order of the cranial nerves: - I: Olfactory - II: Optic - III: Oculomotor - IV: Trochlear - V: Trigeminal - VI: Abducens - VII: Facial - VIII: Vestibulocochlear - IX: Glossopharyngeal - X: Vagus - XI: Accessory - XII: Hypoglossal 4. **Identifying the IV Cranial Nerve**: From the list, we can see that the IV cranial nerve is the **Trochlear nerve**. 5. **Functions of the Trochlear Nerve**: The trochlear nerve is primarily responsible for eye movement. It innervates the superior oblique muscle of the eye, which helps in rotating the eye downwards and laterally. 6. **Conclusion**: Based on the identification and function, the correct answer to the question "The IV cranial nerve is" is **Trochlear**. **Final Answer**: The IV cranial nerve is **Trochlear**. ---
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