All of the following are parts of forebrain, except

Options

A. Cerebellum
B. Corpus callosum
C. Association areas
D. Hypothalamus

Answer

To solve the question, "All of the following are parts of the forebrain, except," we need to identify the components of the forebrain and distinguish them from parts that belong to other regions of the brain.

### Step-by-Step Solution:

1. **Understand the Structure of the Brain**: The brain is divided into three main parts: the forebrain, midbrain, and hindbrain.

2. **Identify the Components of the Forebrain**:
- The forebrain includes:
- **Cerebrum**: The largest part of the brain responsible for higher brain functions.
- **Thalamus**: Acts as a relay station for sensory information.
- **Hypothalamus**: Regulates various autonomic functions and homeostasis.
- **Corpus Callosum**: Connects the left and right cerebral hemispheres.

3. **Identify the Components of the Midbrain**:
- The midbrain includes structures such as:
- **Corpora Quadrigemina**: Composed of superior and inferior colliculi, involved in visual and auditory processing.

4. **Identify the Components of the Hindbrain**:
- The hindbrain includes:
- **Cerebellum**: Responsible for coordination and balance.
- **Medulla Oblongata**: Controls vital functions like breathing and heart rate.
- **Pons**: Connects different parts of the brain and regulates sleep.

5. **Determine Which Part is Not in the Forebrain**:
- From the identified components, the **Cerebellum** is part of the hindbrain, not the forebrain. Therefore, it is the correct answer to the question.

### Final Answer:
The part that is not a part of the forebrain is the **Cerebellum**.

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