Trochlear nerve supplies

Options

A. Superior rectus
B. Inferior oblique
C. Superior oblique
D. Nasal epithelium

Answer

**Step-by-Step Solution:**

1. **Identify the Trochlear Nerve:**
- The trochlear nerve is known as the fourth cranial nerve (CN IV).
- It originates from the brainstem.

2. **Function of the Trochlear Nerve:**
- The primary function of the trochlear nerve is to control the movement of the eyeball.
- Specifically, it innervates the superior oblique muscle.

3. **Muscle Supplied by the Trochlear Nerve:**
- The trochlear nerve supplies the superior oblique muscle, which is responsible for the downward and lateral movement of the eyeball.

4. **Evaluate the Options:**
- The options provided are:
- A) Superior rectus muscle
- B) Inferior oblique muscle
- C) Superior oblique muscle
- D) Nasal abitinib
- Analyzing each option:
- A) Incorrect - The superior rectus muscle is supplied by the oculomotor nerve (CN III).
- B) Incorrect - The inferior oblique muscle is also supplied by the oculomotor nerve (CN III).
- C) Correct - The superior oblique muscle is indeed supplied by the trochlear nerve.
- D) Incorrect - Nasal abitinib is not a muscle and does not relate to the trochlear nerve.

5. **Conclusion:**
- The correct answer is C) Superior oblique muscle.