The superpower inside our heads: Everything about the brain! (Brain)

Hello! How are you? Today we are going to talk about one of the most amazing and important organs in our body. That is our brain . It is like a supercomputer in our body. Everything we do, say, think, our feelings, memories, it controls all of this. Just think, you are reading this right now because of your brain!

Then what is this brain? (`Brain`)

Simply put, your brain is a very complex and powerful organ. The things you perceive through your five senses (sight, hearing, smell, taste, touch), your emotions (such as sadness, happiness, anger), your thoughts, your memories, the way you walk, the way you talk, your behavior... all of this is controlled and regulated by the brain.

Not only that, but it also takes care of things that you don't even realize. Think about it, your breathing, your body temperature, your heart rate... You don't have to think about these things. They happen automatically . All of that is done by our brain. In fact, what makes you who you are, different from others, and special is because of these amazing abilities in your brain.

Your brain is made up of many different, yet interconnected, parts. This system works by sending messages between tiny cells called neurons . These messages are what the brain understands, translates into meaning for our bodies, and allows us to function properly.

Your brain is connected to your spinal cord . Together, the two make up our central nervous system (CNS) .

What are the main functions of the brain?

Now, look at how many things our brains do. Here are some of the main ones:

• Controlling things we don't even realize we do: things like breathing, heart rate, sleep, body temperature.
• Triggering the 'fight-or-flight response' or 'stress response' , which helps us survive in the event of a sudden danger.
• To make sure that the other organs in our body are working properly.
• Controlling our memories and emotions.
• Our movements (`Motor function`), body balance, and fine motor coordination.
• Processing the sensations coming from the five senses (sight, hearing, smell, touch, taste).
• Speaking and understanding language.
• Thinking and making decisions.

Simply put, the brain's job is to send, receive, and process signals that travel back and forth through our central nervous system. These signals are information messages from our five senses. The brain also recognizes signals from within the body, such as pain, body temperature, and heart rate. It is this information that the brain interprets and gives meaning to the things going on around us.

When does our brain stop growing?

Did you know that our brains grow the most from the day we are born until we are young? However, it takes time for the brain to fully mature. This process doesn't happen until you are in your mid- to late 20s .

One of the last parts of the brain to develop and mature is the prefrontal cortex . This part is what helps you make decisions, prioritize tasks, and control your emotions. So this may be one reason why you sometimes have trouble making rash decisions and controlling your emotions when you're young. Because that part isn't quite 'set' yet.

What are the main parts of the brain?

There are three main parts of our brain. Let's see what they are.

1. Cerebrum (`Cerebrum`):

• This is the largest part of the brain. It's like the largest piece of a pumpkin.
• This is the one who understands the information coming from your five senses.
• Also, the cerebellum controls the things we do with our minds, such as speech, memory, behavior, personality, movements, reasoning, and judgment.
• It is divided into two parts: the left hemisphere and the right hemisphere . These two hemispheres are connected by a bridge made of bundles of nerve fibers (which are made up of white matter) called the corpus callosum .

2. Cerebellum:

• This is located at the back of the brain, around the brainstem. It is shaped like a small, semicircle.
• It is responsible for maintaining your balance, posture, coordination, and fine motor skills (such as buttoning a button or writing). Think of it like the one that helps you balance when you ride a bike.

3. Brainstem:

• This is located at the base of the brain, like a tube that connects the rest of the brain to the spinal cord.
• It controls many of the automatic functions of our body. These are things we don't do consciously. For example, things like heart rate, breathing, sleep and wake cycles, and swallowing.

Isn't it amazing? These three parts work together to control our entire body.

How is the brain protected?

Our brain is a very precious and delicate organ, so it needs to be well protected.

Your brain is surrounded by a bony structure called the cranium . This is part of your skull. The brain floats in a fluid called cerebrospinal fluid (CSF) . The bones of the skull and the CSF together protect the brain from injury. It's like a helmet!

Not only that, but between your brain and your skull, there are three layers of tissue called the meninges :

• Dura mater: This is the outermost layer that covers your skull.
• Arachnoid membrane: This is the middle layer. It is a thin tissue that covers the entire brain.
• Pia mater: This is the innermost layer. It contains blood vessels that lead to the surface of the brain.

There are 12 cranial nerves in your brain. Nerves carry messages between the brain, organs, and muscles by sending electrical impulses. This is how information from your body travels through nerves to the brain, and messages from the brain travel to other parts of the body.

Some other important parts of the brain

In addition to the three main parts, the brain has many other very important, smaller parts that perform specialized functions. Let's take a look at a few of them.

• Amygdala: This is part of your limbic system . It is located in the temporal lobes . It helps control your emotions, especially fear.
• Basal ganglia: These are structures deep inside the brain that control your movements.
• Hippocampus: This is a small structure in the cerebral cortex. It is responsible for your memory and learning. It is very important for remembering new things.
• Thalamus: Located above the brainstem, this is like the 'switchboard' of your central nervous system. It relays sensory information from other parts of the body to the cerebral cortex.
• Hypothalamus: The hypothalamus, located below the brain, controls hormones and autonomic functions (such as hunger and thirst).
• Pituitary gland: The pituitary gland, located below the hypothalamus, controls hormone production. Although it is very small, it performs many important functions.
• Pineal gland: This gland, located behind the corpus callosum, controls your sleep and wake cycles.

Imagine how complex all these little parts are when put together!

What are the lobes of the brain?

We discussed earlier that the cerebrum is divided into two hemispheres (sides). On each side, there are four lobes (lobes) . Each of them has a different function.

• Frontal lobe:
• This is in the front part of your brain, behind the forehead. This is the largest lobe.
• It controls many things, such as our voluntary movements, social understanding, thinking, and learning. It is also responsible for things like decision-making and planning.

• Occipital lobe:
• This is at the back of the brain.
• This part of the brain helps you process and understand the visual information (what you see) coming from your eyes.

• Parietal lobe:
• This part of the brain, located at the top and back of the brain, receives and interprets signals from other parts of the brain, giving you an understanding of your surroundings and the state of your body. It is also responsible for sensing things like touch, pain, and temperature.

• Temporal lobe:
• This part of your brain, located on the sides of your head, near your ears, helps you retrieve memories, understand language, and interpret emotions. It's also where you process what you hear.

Look at how each group does a special job. All of this working together is what makes us 'us'.

What is `Gray and White Matter` in the brain?

You've probably heard of the brain's 'gray matter' and 'white matter.' These are two types of tissue in the brain. They're named after their color and function.

• Gray matter:
• This is the dark, outer part of the brain (also called the cerebral cortex ).
• This gray matter helps you with your daily tasks, such as controlling muscles, using your senses, remembering things, experiencing emotions, and speaking.

• White matter:
• This is underneath the gray matter, in light color.
• What this does is send signals to different parts of your central nervous system to help you function properly.

Simply put, if gray matter is like a computer, white matter is like the cables in that computer. One cannot function without the other.

How many cells do we have in our brain?

It is said that there are about 86 billion nerve cells (`Neurons`) in the human brain! Also, there is an equal number of non- neuronal cells called `Glial cells` .

• Neurons: These are the cells that send and receive electrical and chemical signals, like the wires that carry information in the brain.
• Glial cells: These help maintain the brain, make myelin ( a fatty, protective substance in white matter), and provide nutrition to the brain. They are like assistants to the nerve cells.

An incredible number of cells, right?

How much does the human brain weigh?

An adult brain weighs about 3 pounds (1.4 kilograms) . When we are born, it weighs about a pound. It grows to about 2 pounds during childhood. The weight of your brain can vary slightly depending on your gender and body size.

What diseases can affect the brain?

As you know, our brain is responsible for almost everything we do. Therefore, diseases that affect the brain are very common. These diseases can vary in severity and severity. Here are some of them:

• Alzheimer's disease and dementia
• Amyotrophic Lateral Sclerosis (ALS)
• Autism Spectrum Disorder (ASD)
• Brain bleed
• Brain tumor
• Concussion ( a condition that occurs when the head is hit)
• Depression
• Epilepsy
• Multiple Sclerosis (`Multiple Sclerosis` - `MS`)
• Parkinson's disease
• Stroke
• Traumatic Brain Injury (TBI)

Some of these conditions are present at birth, while others develop later in life. The symptoms vary. They can affect many important things, including your mental health, movement, memory, thinking, and speech.

The most important thing is to seek medical advice immediately if you notice anything unusual or unusual in your brain. If you recognize it early, many things can be controlled and treated.

How do we keep our brain healthy?

You probably understand what a valuable and important organ our brain is. It's always working, even when we're sleeping! As you read this, your brain is taking care of everything else in your body: you're breathing, your eyes are blinking, and maybe even reminding you that you're hungry!

So, keeping this brain healthy, which is constantly working to keep our entire body functioning properly, is very important. There are a few things you can do to do that:

• Get together with friends, be social: Talking to people and laughing is a good stimulus for the brain.
• Solve puzzles, exercise your brain: Things like crosswords, Sudoku, and learning something new help keep your brain cells active.
• Meditate to reduce stress: Excessive stress is not good for the brain. Calm your mind through things like meditation and breathing exercises.
• Eat nutritious foods: Eat brain-healthy foods like vegetables, fruits, fish, and nuts.
• Exercise regularly: Physical exercise improves blood flow to the brain.
• Get enough sleep: It is during sleep that the brain repairs itself and stores memories. Therefore, it is essential to get a good night's sleep.

Finally, what to remember! (Take-Home Message)

Our brain is a truly amazing thing. It is what makes us who we are. It controls every thought, feeling, and action we take.

If you have any concerns about your brain health, or if you think you have symptoms of a brain-related disease (e.g. frequent dizziness, memory loss, difficulty speaking), please see a doctor. Don't worry, many things are treatable if recognized early.

Take good care of your brain! It's your most valuable asset.

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