In a man, abducens nerve is injured. Which one of the following functions will be affacted

Options

A. Swallowing
B. Movement of the eye ball
C. Movement of the neck
D. Movement of the tongue

Answer

**Step-by-Step Solution:**

1. **Identify the Abducens Nerve Function**: The abducens nerve (cranial nerve VI) is primarily responsible for controlling the lateral rectus muscle, which is involved in the movement of the eyeball.

2. **Analyze Each Option**:
- **Option A: Swallowing**: This function is controlled by multiple cranial nerves including the trigeminal, facial, glossopharyngeal, and vagus nerves. Therefore, the abducens nerve does not affect swallowing.
- **Option B: Movement of the Eyeball**: The abducens nerve directly controls the lateral movement of the eyeball. If this nerve is injured, the movement of the eyeball will be affected.
- **Option C: Movement of the Neck**: The movement of the neck is primarily controlled by the accessory nerve (cranial nerve XI) and other cervical nerves, not the abducens nerve.
- **Option D: Movement of the Tongue**: The hypoglossal nerve (cranial nerve XII) controls tongue movement, so the abducens nerve does not affect this function.

3. **Conclusion**: Since the abducens nerve is specifically responsible for the movement of the eyeball, an injury to this nerve will result in impaired eye movement. Therefore, the correct answer is **Option B: Movement of the Eyeball**.

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