What you need to know about the gray matter in the brain!

Have you ever wondered what the most amazing organ in our body is? It is our brain. It is like the 'Control Center' of our entire body. Everything we think, do, and feel is controlled by this amazing organ inside our little head. So do you know what this brain is made of? Mainly, the brain is made up of two special types of tissue. One is the ' gray matter ' that we are talking about today. The other is the ' white matter '. Both of these are two parts that are essential for our daily activities to function properly.

Simply put, what is this gray matter?

Okay, let's put this simply. This gray matter is a very important type of tissue in our Central Nervous System, which is your brain and spinal cord. This is where most of the cell bodies of our neurons are located.

Now you may be wondering, 'What are these nerve cells?' Think of them as a network of tiny electrical wires that carry information back and forth throughout our bodies. A nerve cell is made up of three main parts.

1. Neuronal Body: This is the main part of the nerve cell. It is like the root of a tree. It also contains the nucleus of the cell. It is this nucleus that controls the functioning of the entire cell.

2. Axon: This is a long, thread-like part that extends from the cell body, like the trunk of a tree. It is where electrical signals are carried from one cell to another.

3. Dendrites: These are like the branches of a tree, a bunch of tiny fibers that extend out from the cell body. These are where signals from other nerve cells are received.

So, this gray matter is mostly made up of the cell bodies of nerve cells, which are like roots, and the branches, which are like branches. That is, the main work of processing information takes place within this gray matter.

This gray matter begins to form while we are still in the womb. After a baby is born, the volume of this tissue increases until about 8 years of age. Then, its density increases until about 20 years of age. This increase in density is what increases our brain's ability to process information and mental development. But the most important thing to remember is that these nerve cells do not grow new, nor do they regenerate if they die. That is, if a nerve cell is damaged, it does not regenerate.

What is the difference between gray matter and white matter?

This is a confusing point for many people. About 40% of our brain is made up of gray matter, and the remaining 60% is white matter. The two have different functions. It's like the processor and its wires in a computer.

Let us clearly understand the difference between these two from the table below.

Simply put, gray matter is the center of our thinking and reasoning abilities. It is here that everything happens, from our emotions to our memory, learning, speech, and control of voluntary movements. The job of white matter is to quickly relay messages between these information-processing centers.

Where is this gray tissue located in our body?

This is mainly found on the surface of our brain and in some deep parts inside the brain. It is also found inside the spinal cord.

Location within the brain

If you look at a picture of the brain, it looks like it has wrinkles on its surface, right? Those wrinkles and folds (Gyri and Sulci) are made of gray matter. Do you know why they are wrinkled like that? Then you can pack a lot of surface area into a small space (inside our skull). That's why humans have more gray matter than other animals. That's why we can think and learn complex things.

The areas of the brain where gray matter is most abundant are:

• Cerebellum: This is the part of our brain at the back, underneath. It contains the largest number of nerve cells in the entire brain. It is very important for controlling the body's balance and movements.
• Cerebrum: This is the largest part of the brain. This is where our higher mental functions, such as thinking, memory, and language, occur.
• Brainstem: This is the part that connects the brain and spinal cord. It is essential for controlling vital functions such as breathing and heartbeat.

Location within the spinal cord

If you take the spinal cord, it has white tissue on the outside, and gray tissue on the inside. It's shaped like a butterfly.

Can gray matter be damaged or reduced?

Yes, unfortunately, that can happen. When the nerve cells in the gray matter die, this tissue atrophies. The main reason for this is that those cells do not get the oxygen and blood supply they need. Just think, because these cells are constantly working, they need a lot of energy and oxygen to function properly.

Additionally, some gray matter cells naturally die as we age, but these are the longest-living cells in our bodies.

There are several other conditions that damage gray matter:

• Alzheimer's disease: This is caused by abnormal deposits of proteins (Amyloid and Tau) in the brain. This causes the death of nerve cells in the gray matter.
• Parkinson's disease: This is caused by the loss of nerve cells in the part of the brain called the 'Substantia Nigra', which is made up of gray tissue.
• Multiple Sclerosis (MS): This is known as a disease that mainly affects white matter. However, new research has found that the disease also damages gray matter, especially in the deeper parts of the brain.
• Traumatic Brain Injury (TBI): A severe blow to the head can cause bleeding inside the brain and damage the cells in the gray matter.

What are the symptoms of gray matter damage?

The symptoms of gray matter damage depend on which part of the brain is damaged. But in general, you may see symptoms like these:

• Memory loss or decline: Difficulty remembering new things, forgetting old things.
• Cognitive Impairment: This refers to changes in thinking and decision-making abilities. For example:
• Language problems (difficulty speaking, finding words).
• Inability to concentrate.
• Difficulty thinking logically and making complex decisions.
• Motor Issues: Difficulty with fine movements, especially when using your hands to button a shirt, write, or hold a cup.

If you or someone close to you has these symptoms, it is very important to see a doctor immediately and seek advice without delay.

How do doctors diagnose this condition?

Doctors usually use an MRI (Magnetic Resonance Imaging) scan to check the health of your gray and white matter. This test is very helpful in diagnosing conditions like Parkinson's disease and MS. In addition, tests like fMRI (Functional MRI) and PET (Positron Emission Tomography) may also be used.

Is there treatment if it is damaged?

Unfortunately, there is currently no way to reverse or completely heal damage to gray matter, because as we mentioned earlier, once nerve cells die, they cannot regenerate.

Therefore, the only thing you can do is try to control the symptoms and prevent the disease from getting worse. To do this, it is essential to follow the treatment prescribed by your doctor exactly.

How do we keep our gray matter healthy?

This is the most important part. It is much better to prevent damage than to treat it after it has occurred. Proper blood and oxygen supply is essential for the health of gray matter. Therefore, it is very important to reduce the risk of cerebrovascular disease.

Here are some things you can do:

• Control high blood pressure (hypertension): If you have high blood pressure, take the medication your doctor prescribes on time.
• Exercise regularly: It is very good to do at least 30 minutes of sweat-inducing exercise a day.
• Limit alcohol consumption: Stay away from alcohol as much as possible.
• Maintain a healthy weight: It is very important to maintain a weight that is appropriate for your height.
• Get good sleep: 7-8 hours of good sleep per day is essential.
• Control blood sugar and cholesterol levels: If you have diseases like diabetes and cholesterol, control them well.
• Avoid or quit smoking.
• Reduce stress: Things like meditation and yoga can help reduce stress.

Research has shown that even over the age of 65, people who exercise regularly have a greater volume of gray matter than those who don't. This means that staying active throughout life is very beneficial for our brain health.

In addition, it is also very good to learn new things that challenge the brain. Things like learning a new language, a musical instrument, or reading books do not create new nerve cells, but they do create new connections between existing nerve cells. We call this brain plasticity / neuroplasticity.