Shall we talk about this amazing network (Peripheral Nervous System) that carries information throughout our body?

Have you ever wondered how complex things are going on inside our bodies? It's like a supercomputer, isn't it? To coordinate all of this, and to carry information from one place to another, we have a special system. We call it the nervous system . It has two main parts. One is the Central Nervous System , which acts as our "main control center." The other is the Peripheral Nervous System , which we're going to talk about today, and which is spread throughout the body. Just think of an amazing system of "wires" that run from your head to your toes !

So what is this Peripheral Nervous System?

Simply put, the Peripheral Nervous System ( PNS ) is a large network of nerves that starts from our central nervous system (i.e., the brain and spinal cord) and extends throughout the head, neck, body, and limbs. It's like the electrical wiring system in a house. From the main switchboard (i.e., the central nervous system), wires run to every room, every light, and every plug point, right? That's how it is.

Do you know what nerves are? They are like tiny cables. They are made up of a special type of cell called neurons . These neurons can transmit information very quickly through electrical and chemical signals. Imagine, if you hit your finger somewhere, the pain travels to the brain within seconds through this network of nerves.

What is the relationship between the Central Nervous System and the Peripheral Nervous System?

These two are like the head office of a large company and its branch network.

• The Central Nervous System (CNS) is our brain and spinal cord . This is the "control room" or "decision-making center" of our body. All information is collected, analyzed, and decisions are made here.
• The Peripheral Nervous System (PNS) is the "communications agent" that carries information from the main control room to all other parts of the body, and also brings information back to the control room from various parts of the body.

Simply put, the CNS cannot function on its own without the PNS. The PNS is essential for carrying messages from the CNS throughout the body and for relaying sensations from the body to the CNS. Together, these two make up our entire nervous system.

What are the main parts of the Peripheral Nervous System?

The peripheral nervous system (PNS) can be divided into two main parts, depending on the function it performs.

1. Somatic Nervous System

This is related to the things we can control at will . That is, the things you do consciously.

• Voluntary movements: Things like raising an arm, moving a leg, walking, talking. These are done through the nerves that control our skeletal muscles . We call these `motor nerves` . These carry commands from the brain and spinal cord to the muscles.
• Receiving Sensations: The sensations received from our five senses (eyes, ears, nose, tongue, skin) – such as sight, hearing, smell, taste, touch , pain, temperature – are carried to the brain by the sensory nerves belonging to this system.

Imagine you see a friend and you wave. The sensation of seeing your friend (the sensation) goes to the brain via a sensory nerve. Then the message from the brain to wave goes to the muscles in your hand via a motor nerve. This all happens through the somatic nervous system.

2. Autonomic Nervous System

This is the amazing part. It controls things that happen automatically, without us even realizing it . You don't think about things like breathing, heart rate, digestion, or controlling your body temperature, do you? They happen automatically. That's what the Autonomic Nervous System (ANS) controls.

This autonomic nervous system is again divided into two main parts. They work like the accelerator and brakes of a car.

A. Sympathetic Nervous System

This is our "emergency system." It's like preparing us for "fight or flight." This system kicks in when you're scared, in danger, or under a lot of stress.

• Heart rate increases.
• Breathing is accelerated.
• The pupil of the eyes is enlarged (to see better).
• Sweating.
• Things that are not essential at that time, such as digestion, are temporarily stopped or reduced.

All of this is done to give your body more strength to deal with emergencies.

B. Parasympathetic Nervous System

This works in opposition to the sympathetic system. This is the "Rest and Digest" system. When the emergency passes, when you calm down, this system kicks in and brings the body back to normal.

• Reduces heart rate.
• Breathing is calming.
• Improves digestion.
• Helps save energy.

Now you understand how important it is for these two systems to work in balance? One "stimulates" the body, while the other "calms" it down.

So what exactly does this peripheral nervous system (PNS) do for us?

We just talked about shares. Now let's see what services we get from PNS in general.

• Sensory awareness helps us: We feel everything, including heat, cold, pain, smell, taste, sight, and hearing, because the information travels to the brain through the sensory nerves in the PNS. Imagine, if you accidentally touch a hot cup of tea, how would you move your hand away as soon as you feel the heat? Within seconds, the PNS sends a signal to the brain saying, "It's hot!", and the brain sends a signal back saying, "Take your hand away!"
• Our movements are controlled: walking, running, writing, talking, laughing... All of this is controlled by our muscles through the motor nerves of the PNS.
• It controls things that happen automatically inside the body: Many things that we cannot control, such as heartbeat, breathing, sweating, digestion, and blood pressure, but are essential for survival, are controlled by the autonomic part of the PNS.
• Reflexes: Sometimes our bodies react before we even think about it to avoid an accident. For example, raising our legs when we are hit by a stick, or closing our eyes when we see something. These are called reflexes. These occur because a quick message is sent to the spinal cord via the PNS, and a quick response is received from there. Sometimes these occur before the message even reaches the brain.

Can our peripheral nervous system (PNS) have problems?

Yes, absolutely. With such a complex system, sometimes problems can arise. If the nerves are damaged, their function can be impaired. This is called peripheral neuropathy .

Commonly seen symptoms are:

• Numbness, tingling, and pain in the limbs (especially at night)
• Decreased sensation of touch, temperature, and pain
• Muscle weakness, difficulty walking
• Loss of balance, frequent falls
• If the autonomic nervous system is affected, things like changes in sweating, changes in blood pressure, and digestive problems can occur.

What could be causing this?

• Diabetes Mellitus: Diabetes is the leading cause of peripheral neuropathy. Prolonged high blood sugar levels can damage the nerves.
• Vitamin deficiencies: Especially deficiency of `(Vitamin B12)` and other B vitamins.
• Injury: A cut, bruised, or pulled nerve from an accident.
• Nerve compression: For example, carpal tunnel syndrome, which is caused by compression of a nerve that passes through the wrist.
• Infections: Some viral and bacterial infections.
• Toxins: Excessive alcohol use, exposure to certain chemicals.
• Immune system diseases: In some diseases, our own immune system attacks the nerves.
• Cancer and cancer treatments: Some types of cancer and treatments such as chemotherapy can affect the nerves.

If you have these symptoms, it's important to see a doctor for advice. Early detection can often help treat the condition and prevent it from getting worse.

How do we take good care of our precious peripheral nervous system (PNS)?

Keeping the PNS healthy, which helps our entire body communicate, is very important. Let's see what we can do for it.

• Eat a balanced diet: It is important to eat nutritious foods, especially foods rich in vitamin B (grains, vegetables, fruits, meat, fish, eggs).
• Control diabetes: If you have diabetes, control your blood sugar levels well through diet, exercise, and, if necessary, medication, as directed by your doctor.
• Exercise regularly: Exercise improves blood circulation, which is also good for the nerves.
• Avoid alcohol and smoking: These are harmful to the nerves.
• Take safety precautions: Avoid accidents that damage nerves. Use safety equipment at work and while playing sports.
• Get proper treatment for chronic diseases: Not only diabetes, but if you have other chronic diseases, get them treated properly as well.
• Be careful with repetitive motions: If you work in a job that involves repetitive movements (e.g., working at a computer), take frequent breaks and change positions to avoid nerve compression.

Finally, things to remember (Take-Home Message)

So, I hope you now have a good idea of ​​what the Peripheral Nervous System is. This is the amazing "communication network" that carries messages from our brain and spinal cord to every corner of the body, and also receives messages from everywhere.

• It has two parts: the somatic system, which we can control, and the autonomic system, which operates automatically.
• The autonomic nervous system is also divided into two parts: sympathetic (emergency) and parasympathetic (rest).
• All of our sensations, movements, and many other natural processes within the body depend on this PNS.
• Conditions like diabetes can damage this system, so it's important to follow a healthy lifestyle .
• If you experience symptoms of nerve-related diseases , do not waste time and seek medical advice .

Our bodies are amazing creations. A little bit of awareness about these complex systems can help us keep them healthy. So, don't forget to take care of your "body wiring system" too!

Peripheral nervous system, nerves, central nervous system, autonomic nervous system, somatic nervous system, neurological diseases, neurological health