An oval mass of white mater . Present

Options

A. Pneumothoracic center
B. Pneumococcal center
C. Pneumatic center
D. Pneumotaxic center

Answer

To solve the question regarding the "oval mass of white matter present," we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: The question refers to an "oval mass of white matter." In the context of neuroanatomy, white matter consists of myelinated axons that connect different parts of the brain.

2. **Identifying the Options**: The options given are:
- A) Pneumothoracic center
- B) Pneumococcal center
- C) Pneumatic center
- D) Pneumotactic center

3. **Analyzing Each Option**:
- **Pneumothoracic Center**: This term is not commonly used in neuroanatomy and refers more to the thoracic cavity. It is likely incorrect in this context.
- **Pneumococcal Center**: This term relates to a type of bacteria (Streptococcus pneumoniae) and is not relevant to the structure of the brain.
- **Pneumatic Center**: While this term does relate to the brain, it typically refers to functions associated with respiration but does not specifically refer to an oval mass of white matter.
- **Pneumotactic Center**: This is a center in the brain that regulates the rate and rhythm of breathing. It is located in the pons and is associated with the presence of white matter.

4. **Identifying the Correct Answer**: The correct answer is **D) Pneumotactic center**. The pneumotactic center is indeed an oval mass of white matter located in the brain, specifically in the cerebral hemisphere, and is responsible for controlling respiratory rhythm.

### Final Answer:
The correct answer is **D) Pneumotactic center**.