Why is vitamin `B_(1)` called antineuritic factor?

Explanation

### Step-by-Step Solution:

1. **Understanding Vitamin B1**: Vitamin B1, also known as thiamine, is a water-soluble vitamin that plays a crucial role in carbohydrate metabolism and neural function.

2. **Deficiency Disease**: The deficiency of vitamin B1 leads to a disease known as beriberi. This condition is characterized by various symptoms, primarily affecting the nervous system.

3. **Symptoms of Beriberi**: One of the key symptoms of beriberi is polyneuropathy, which refers to inflammation and damage to multiple peripheral nerves. This can lead to muscle weakness, pain, and coordination issues.

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