Human brain

Your brain is a very busy part of you.

It is soft, like tofu. It stays safe inside your hard skull.

The brain has a large top part. This part helps you plan and think. It also helps you see things.

There is a small part at the back. It is called the little brain. This part helps you move. It works with the rest of your body.

A stem connects the brain to your spine. This stem helps send messages. It acts like a bridge for your body.

Tiny cells work together in your brain. They send signals to help you act. These cells make your brain work every day.

Your brain is the main part of your nervous system. It works with your spinal cord to control your body.

The brain is very soft. It feels like soft tofu. Your hard skull keeps it safe.

The brain has three main parts. The largest part is the cerebrum. It has two sides called hemispheres. These sides are joined by the corpus callosum. The corpus callosum is a large bridge of nerves. Each side has four lobes. The frontal lobe helps with planning and self-control. The occipital lobe helps you see. The temporal lobe helps with hearing and memory. The parietal lobe helps you feel things.

Behind the brainstem is the cerebellum. This is often called the little brain. It sits at the back of your head. The brainstem connects the cerebrum to your spinal cord.

Inside your brain, tiny cells called neurons work hard. There are more than 86 billion neurons. They send signals to each other. These signals let you move and think. This constant work is called neurotransmission.

The human brain is the most important part of your nervous system. It works with your spinal cord to manage your whole body.

The brain processes information from your senses and sends instructions to your muscles. It is a very soft organ with a gel-like texture. Some people say it feels like soft tofu.

Your hard skull acts like a helmet to keep it safe. The brain also floats in a special fluid called cerebrospinal fluid. This fluid helps protect the brain from moving too much.

The brain has three main parts: the cerebrum, the brainstem, and the cerebellum. The cerebrum is the largest section and sits on top.

It is divided into two halves called hemispheres. These two sides are connected by a large bridge of nerves called the corpus callosum. Each hemisphere has four main lobes: the frontal, parietal, temporal, and occipital lobes. The frontal lobe helps with planning and self-control. The occipital lobe is dedicated to your vision. The temporal lobe helps with hearing, speech, and memory. The parietal lobe helps you feel things.

Inside the brain, tiny cells called neurons do all the work. There are more than 86 billion neurons in a human brain. These neurons connect to form long paths and networks. They send signals to each other using a process called neurotransmission. This happens when neurons release special chemicals called neurotransmitters. There are also billions of other cells called glial cells that support the neurons. This massive network of cells allows you to think, move, and feel.

Scientists study the brain in different ways. People who study the parts of the brain use a field called neuroanatomy. People who study how the brain works use neuroscience. Doctors use special tools like EEG recordings to see brain activity. They also use medical imaging to look inside the living brain. In the past, people studied animals under microscopes to learn more. Today, research is still growing every single day.

Learning about the brain helps us understand how we become ourselves. For a long time, philosophers have wondered how our minds work with our bodies. In the 1800s, a mistaken idea called phrenology tried to find personality in the shape of the head.

Even science fiction movies imagine things like brain transplants. The brain is what lets you experience the world around you. It is the center of everything you do.

The human brain is the central organ of the nervous system. Together with the spinal cord, it forms the central nervous system. The brain acts as a control center for the entire body. It processes, integrates, and coordinates information from the sensory nervous system. This allows the body to react to the world around it. The brain is a very soft organ. It has a gel-like consistency similar to soft tofu.

The brain is divided into three main structural parts. These are the cerebrum, the brainstem, and the cerebellum. The cerebrum is the largest part and sits on top. It consists of two cerebral hemispheres. These hemispheres are separated by a deep groove called the longitudinal fissure. They are connected by nerve tracts called commissures. The largest of these connections is the corpus callosum.

Each hemisphere of the cerebrum has a specific structure. The outer surface is the cerebral cortex, which is made of grey matter. This cortex contains layers of neurons. The largest part of the cortex is the neocortex, which has six neuronal layers. The inner part is called the allocortex, which has three or four layers. Beneath this grey matter lies the white matter. This white matter is made of myelinated axons. It makes up about half of the total brain volume.

The cerebral cortex is organized into specialized lobes. The frontal lobe handles executive functions like reasoning and planning. The occipital lobe is the smallest and is dedicated to vision. The temporal lobe manages auditory and visual memories, language, and speech. The parietal lobe is involved in sensory processing. Some sources also include a central lobe, a limbic lobe, and an insular lobe. These areas work together through complex association areas to handle thought and decision-making.

Deep inside the brain, several important structures regulate body functions. The brainstem connects the cerebrum to the spinal cord. It includes the midbrain, the pons, and the medulla oblongata. Behind the brainstem sits the cerebellum. The cerebellum is divided into an anterior lobe, a posterior lobe, and a flocculonodular lobe. Deep within the hemispheres, the basal ganglia help regulate movement and behavior. These include the striatum, the globus pallidus, and the substantia nigra.

Brain activity relies on a massive network of cells. There are more than 86 billion neurons in the brain. There is also a roughly equal number of supportive glial cells. Neurons communicate through a process called neurotransmission. They release chemicals known as neurotransmitters in response to nerve impulses. These cells connect to form neural pathways and elaborate circuits. The brain is protected by the skull and cushioned by cerebrospinal fluid. This fluid circulates through a system of four interconnected ventricles.

Scientists use different fields to study these complex systems. Neuroanatomy is the study of the brain's physical structure. Neuroscience is the study of how the brain functions. Researchers use medical imaging and electroencephalography (EEG) to observe activity. They also learn from the medical history of people with brain injuries. The brain is susceptible to many issues. These include strokes, which are a loss of blood supply. It can also face degenerative disorders like Alzheimer's disease or Parkinson's disease.

Humanity has long been fascinated by the nature of the mind. For centuries, philosophers have explored the mind-body problem. In the 19th century, a pseudoscience called phrenology attempted to map personality to the skull. This idea was incorrect, but it shows our early desire to understand the brain. Today, we continue to explore the brain through advanced technology. We even see the brain's importance in science fiction, such as stories about brain transplants.