Which of the following have a highly convoluted surface to provide the additional space for more neurons?

Options

A. Spinal cord
B. Corpus callosum
C. Cerebellum
D. Hypothalamus

Answer

To solve the question about which structure has a highly convoluted surface to provide additional space for more neurons, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which of the given options has a highly convoluted surface that allows for more neurons. "Convoluted" means that the surface is folded or wrinkled, increasing its area.

2. **Analyze the Options**:
- **Spinal Cord**: The spinal cord is a straight structure that runs down the back. It does not have a convoluted surface.
- **Corpus Callosum**: This is a bundle of nerve fibers that connects the left and right hemispheres of the brain. It is not convoluted; rather, it has a smooth surface.
- **Cerebellum**: The cerebellum is part of the brain and has a highly convoluted surface, which increases its surface area and allows for a greater number of neurons.
- **Hypothalamus**: The hypothalamus is a small gland in the brain that regulates various bodily functions. It does not have a convoluted surface.

3. **Identify the Correct Answer**: Among the options analyzed, the cerebellum is the only structure that has a highly convoluted surface, allowing for more neurons.

4. **Conclusion**: Therefore, the correct answer to the question is the **Cerebellum**.

### Final Answer:
**Cerebellum**