The most amazing and complex organ in our body is the brain. It's like a supercomputer. Everything we think, feel, remember, and learn is controlled by this tiny organ. So today we're going to talk about the most important part of this supercomputer, the "bark" that's right outside the brain. In medicine, we call this the cerebral cortex , or `(Cerebral Cortex)`.
What is the Cerebral Cortex?
Simply put, the cerebral cortex is the outermost, thin layer that surrounds the large part of our brain called the cerebrum. If you've ever seen a picture of the brain, it looks wrinkled and folded, right? That wrinkled appearance is because of this cerebral cortex.
Imagine, if you want to pack a large sheet of paper into a small box, you have to fold it and crush it, right? In the same way, our brains are made of wrinkles in this way to accommodate as many neurons as possible. These wrinkles greatly increase the surface area of the cerebral cortex. About 2,500 square centimeters to be exact! This allows our brains to process more information and think more complex things.
Although this layer is only a few millimeters thick, it makes up about 50% of the total mass of our brain. It is estimated to contain between 14 and 16 billion nerve cells .
The deep grooves that form as a result of this wrinkled nature are called ``sulci`` and the raised folds are called ``gyri``. These are the structures that house millions of nerve cells that are essential for the functioning of our brain.
Why is this called 'Gray Matter'?
You've probably heard the term 'gray matter'. That's what this part of the cerebral cortex is all about. The nerve cells in this part don't have a fatty covering called `(myelin)`. That's why it's gray. The nerve fibers in the 'white matter' inside the brain are covered in `(myelin)`, so it's white.
The main parts of the cerebral cortex and their functions
Our cerebral cortex is mainly divided into two equal hemispheres. That is the left hemisphere and the right hemisphere . These two hemispheres are connected to each other by a bridge made of a large number of nerve fibers called ``corpus callosum``. It is through this that information is exchanged between the two hemispheres.
In addition, each of these hemispheres is further divided into four main regions, or lobes. Each of these lobes has specific functions. Let's take a look at what they are.
| Lobe | Main functions | Symptoms of damage |
|---|---|---|
| Frontal Lobe The frontmost part of the brain, behind the forehead |
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| Parietal Lobe On the top of the head, between the frontal and parietal bones |
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| Temporal Lobe Above the earlobes, on either side of the brain |
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| Occipital Lobe Back of the head, above the neck |
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What happens if the cerebral cortex is damaged?
There are several main reasons why this important part of the brain can be damaged. For example:
- Brain tumors
- Stroke
- Bleeding into the brain
- Autoimmune diseases
- Serious head injuries
As the table above shows, the symptoms vary greatly depending on the part of the brain that is damaged. For example, a person's personality can change if the frontal lobe is damaged. Similarly, a person's vision can be lost if the occipital lobe is damaged.
Very important: If you or someone you know has any of these symptoms, do not assume anything and see a qualified doctor or physician immediately. Brain-related issues are very sensitive, so seeking prompt medical advice is essential.
The brain is the control center of our body. It's what makes us "us." So, knowing these facts about the cerebral cortex, the most important part of that supercomputer, will be a great help in being aware of our health.
Take-Home Message
- The cerebral cortex is the outermost, wrinkled, thinking part of our brain. It is also called "gray matter."
- Its wrinkles and folds allow it to contain more nerve cells in less space.
- It is divided into four main sections (frontal, parietal, temporal, and occipital), each of which has specialized functions (such as speech, vision, memory, and decision-making).
- Symptoms of damage to the cerebral cortex vary depending on where the damage occurs.
- If you have any brain-related symptoms, it is very important to avoid self-diagnosis and see your doctor as soon as possible.
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