The nervous system

The Nervous System

Our body is like a large orchestra: each instrument must play at the right time to create the music of life. Conducting this orchestra is the nervous system, which allows us to move, think, feel emotions and perceive what is happening around us. It is thanks to him that we can run, laugh, learn new things and even dream. Without the nervous system, all parts of the body would not know how to communicate with each other, and our “symphony” would stop. The nervous system is therefore the center of our body and the most important system whose cells are made up of nervous tissues. It is divided into:

Central Nervous System

Imagine you are the captain of a huge ship. There are sailors pulling ropes, others checking the sails, some cooking, others watching the sea. Everyone has a specific task, but without the captain giving orders and coordinating, the ship would not know where to go.

The central nervous system directs and controls everything that happens in our body. It consists of two main parts: the brain and the spinal cord. The brain is the “control room” that interprets information from the senses and transforms it into thoughts, emotions, and decisions. This allows us to learn, solve problems, and feel joy.

The spinal cord acts as a communication highway between the brain and the body. It transmits orders from the brain to the muscles and reports sensations back to the brain. The central nervous system works constantly to control vital functions such as breathing and heartbeat, even while we sleep.

The brain is like a computer processor, while the spinal cord is like the cables that connect the processor to the parts of the body. Let's take a closer look at the brain, or rather the encephalon.

The encephalon is the main part of the central nervous system, located in the head and protected by the skull. It controls all our actions, from simple movements to complex thoughts, from emotions to memories, and manages vital functions such as breathing and heartbeat. It is composed of several parts: the cerebrum, which allows us to think and feel emotions; the cerebellum, which regulates balance and coordination; and the brainstem, which connects the brain to the spinal cord and controls vital functions. The brain uses information from the senses, interprets it, and decides how to react. It is protected by three membranes and a special fluid, which is essential for its functionality. Without it, we would not be able to think, move, or feel emotions.

The spinal cord is a long, cord-like structure located inside the spine and connected to the brain. It functions as a major communication highway: it carries messages from the brain to the rest of the body and collects information from the senses and muscles to send back to the brain. It is essential because it allows for rapid movements and immediate reactions, such as when we pull our hand away from something hot without thinking.Simply put, the spinal cord is the bridge that connects the mind to the body and makes all our daily actions possible

Peripheral Nervous System

The peripheral nervous system is a network of nerves that extends from the central nervous system and connects the brain and spinal cord to muscles, skin, and organs. Without it, the brain could not communicate with the body. The peripheral nervous system is divided into two main parts: the somatic nervous system and the autonomic nervous system.

The somatic system controls voluntary movements and brings sensations from our sense organs to the brain. The autonomic system, on the other hand, regulates involuntary functions such as breathing and heartbeat. This system is divided into two parts that work together: the sympathetic and the parasympathetic.

The sympathetic is active in emergency situations, preparing the body to react by increasing the heart rate and breathing. The parasympathetic, on the other hand, calms the body, slowing the heart and promoting recovery. In this way, the peripheral nervous system ensures that our body is ready for action and can also relax when necessary, maintaining a balance between activity and rest.

But how exactly do nerve impulses reach the entire body if the brain is in the upper part? All this happens thanks to neurons. A neuron is a cell of the nervous system that has a particular shape: it looks like a tree with many branches. These branches are used to receive and send signals. Every time you touch something, think, move or feel an emotion, neurons activate and pass the message from one part of the body to another. They are made up of a long body called the Axon, and ends with dendrites that receive and send signals from other organs. The process of sending impulses can be divided into 3 parts:

The neuron receives a signal: it can come from another neuron or from a sense organ (for example the skin when you touch something hot). The signal travels along the axon: it is like an electric cable that carries the information to the end of the cell.

It reaches the synapse: it is the tiny space between one neuron and another. Here the electrical signal is transformed into a chemical message thanks to neurotransmitters.

The message passes to the next neuron: and so the journey continues, until it reaches the brain or muscles.

The neurons always travel in the same direction, that is, if they go right they will never go left.

BENEFITS FOR THE NERVOUS SYSTEM

A walk in the countryside is just one of many activities that can support the nervous system, but it remains a perfect example of how even simple activities can have profound effects. Immersing yourself in nature reduces the activation of stress-related areas of the brain, promotes slower and deeper breathing, and stimulates the production of mood-enhancing substances. The autonomic nervous system, responsible for the balance between tension and relaxation, benefits greatly from this contact: the heart rate stabilizes, the muscles relax, and the mind regains clarity.

Other daily habits can also help strengthen and protect the nervous system.

Regular sleep allows neurons to recover and consolidate information, improving memory and concentration.
A diet rich in nutrients such as omega-3, B vitamins, and antioxidants supports communication between nerve cells.
Deep breathing or meditation helps reduce the activity of the sympathetic nervous system, which is activated in situations of alertness, promoting calm and clarity instead.
Positive social relationships stimulate areas of the brain linked to security and well-being, contributing to a more resilient nervous system.

Together, these practices create a sort of “ecosystem” conducive to mental and physical well-being. A balance that does not require major changes, but small gestures repeated consistently.

NEGATIVE EFFECTS FOR THE NERVOUS SYSTEM

Excessive cell phone use, with constant notifications and high brightness, keeps the nervous system in a state of overload. This stimulus prevents the brain from resting and can disrupt sleep, as blue light interferes with natural rhythms. The constant switching between apps, messages, and content fragments attention, reducing the ability to concentrate on a task. Anxiety increases due to the need to be constantly available. In addition, poor posture, such as a bent neck and tense shoulders, increases tension and contributes to overall fatigue.

But it is not only cell phones that have a negative effect on the nervous system.

Lack of regular sleep weakens the brain's ability to recover, increasing irritability and stress.
A diet low in essential nutrients reduces mental energy and communication between nerve cells.
Continuous emotional stress keeps the nervous system in a state of alert, making it difficult to relax.
Prolonged sedentary lifestyles limit tissue oxygenation and fatigue the nervous system.
Excess caffeine or stimulants can cause agitation, tremors, and difficulty concentrating.

Together, these practices create a kind of “ecosystem” conducive to mental and physical well-being. A balance that does not require major revolutions, but small gestures repeated consistently.

Nervous system and America: Society for Neuroscience

The Society for Neuroscience, often referred to by the acronym SfN, is the largest American organization dedicated to the study of the nervous system. Founded in 1969 in Washington, D.C., it brings together tens of thousands of researchers, doctors, and students from around the world with the aim of deepening knowledge of the brain and all its functions. Its mission is to promote neuroscientific research, support the training of young scholars, and encourage the dissemination of scientific discoveries to the public and institutions. Every year, it organizes a huge international conference, simply called Neuroscience, which is one of the most important events for the scientific community: thousands of scholars present the results of their research, discuss new experimental techniques, and initiate collaborations. The society also publishes highly influential scientific journals, such as The Journal of Neuroscience, which help to disseminate advances in the fields of neurobiology, cognitive neuroscience, neurology, and many other related disciplines. Over time, the SfN has become a global reference point for anyone involved in brain and behavior research, offering training opportunities, scholarships, and outreach initiatives that strengthen the link between science and society. If you wish, I can transform this text into a shorter, more technical, or more narrative version.

Page updated

Google Sites

Report abuse