What you need to know About the Nervous system

The nervous system is organ system, which controls communication in the body. There are four types of nerves in the nervous system cells: sensory nerves, motor nerves, autonomic nerves and interneurons (neuron – it’s just a fancy word for a nerve cell.)

It can divide all the nerves in the body into about two parts: central nervous system e peripheral nervous system.

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Central nervous system (CNS)

The central nervous system contains two organs: the brain and the spinal cord. It has all four types of nerve cells and is the only place where you can find interneurons. The central nervous system is pretty well isolated from the outside world. He doesn’t even touch the blood. It gets nutrients from the cerebrospinal fluid, a clear fluid that bathes the brain and spinal cord.

Both organs are covered by three layers of membranes called meninges. CITE the meninges and cerebrospinal fluid that soften the brain so it doesn’t get hit to the head. A possible infection by viruses or bacteria in the meninges, called meningitis. Bleeding between the meninges and the skull (called an epidural hematoma)is also possible, or between the layers of the meninges (called subdural hematoma). Any bleeding or infection inside the skull can put pressure on the brain and cause it to fail.

The central nervous system is like the bowels of your computer. It’s there, inside, with millions of connections that transmit small impulses from circuit to circuit (nerve to nerve), calculating and thinking. Your brain produces all the calculations and stores information. Your spinal cord is like a wire with many individual wires going to all the different parts of the brain.

But the computer brain inside your laptop, just like the brain in your head, is useless on its own. You should be able to tell your computer what you need and see or hear what your computer is trying to tell you. You need some kind of input and output device. Your computer uses a mouse, touchscreen, or keyboard to determine what you want it to do. Use the display and speakers to respond.

Your body works very similarly. You have the sensory organs to transmit information to the brain: eyes, ears, nose, tongue, and skin. To react, you have muscles that make you walk, talk, focus, wink, stick out your tongue, whatever. Your i / o devices are part of your peripheral nervous system.

Peripheral nervous system (PNS)

The peripheral nervous system is everything related to the central nervous system. It has motor nerves, sensory nerves and autonomous nerves. Autonomic nerves act automatically and is a way to remember them. These are the nerves that regulate our body. They are a version of the body’s thermostat, clock and fire alarm. They work in the background to keep us informed and healthy, but they don’t require brain energy and they don’t need control.

Autonomic nerves are weakly divided into sympathetic or parasympathetic nerves.

  • Sympathetic nerves tend to speed us up. They increase heart rate, breathing, and blood pressure. These nerves are responsible for the “fight or flight”response.
  • Parasympathetic nerves stimulate blood flow to the intestine. They slow down the heart and lower blood pressure.

Think of sympathetic nerves as a body accelerator and parasympathetic nerves as a brake pedal. Her body always stimulates both the parasympathetic and the sympathetic side at the same time, just like my grandmother drove a car, putting one foot on each pedal.

Motor nerves start from the central nervous system and go to the ends of the body. They’re called motor nerves because they always end up in muscles. If you think about it, the only signals your brain sends to the outside world are to make things move. Walking, talking, fighting, running, or singing requires muscle.

Sensory nerves go the other way. They transmit signals from the outside to the central nervous system. They always start in the sensory organ: eyes, ears, nose, tongue, or skin. Each of these organs has more than one type of sensitive nerve, for example, the skin may feel pressure, temperature, and pain.

A Few Words About The Spinal Cord

The spinal cord is the connection between the central nervous system and the periphery. Technically it’s part of the CNS, but that’s how most of the motor and sensory nerves enter the brain. Inside the spinal cord are some of the interneurons mentioned above. In the brain, interneurons are like microscopic switches on a computer chip that help with calculations and heavy reflections.

In the spinal cord, the interneurons perform a different function. Here, they act as a planned short circuit, allowing us to respond to some things faster than we could if the signal had to go to the brain and come back. Interneurons in the spinal cord are responsible for reflexes, which is why you shake when you touch a hot pan before you realize what happened.

Sending Signals

Nerves transmit messages through signals called impulses. Just like in a computer, the signal is binary; it is on or off. A single nerve cell cannot send a weaker or stronger signal. You can change the frequency, ten pulses per second, for example, or thirty, but each pulse is exactly the same.

Impulses pass through the nerve in the same way that muscle cells contract, through chemistry. Nerve cells use ionized minerals (salts such as calcium, potassium, and sodium) to promote momentum. I won’t go too deep into physiology, but the body needs the right balance of these three minerals for the process to work properly. Too much or too little of any of these, and neither the muscles nor the nerves will work properly.

Nerve cells can be quite long, but it still takes several to get from the tip of the finger to the spinal cord. The cells do not come into contact with each other. Instead, the impulse is chemically transmitted (transmitted) from one nerve cell to another using substances known as neurotransmitter.

Adding neurotransmitters to the bloodstream can cause nerves to send signals. For example, many of the sympathetic nerve cells mentioned above (fight or flight cells) respond to a neurotransmitter called epinephrine, which is released into the bloodstream from the adrenal glands when we are scared, tense, or scared.

A Few Words From Get Meds Info

If you have a clear idea of how the nervous system works, it’s a small jump to understand why certain substances or medicines affect us the way they work. It is also easier to understand how cerebral haemorrhage or shock the brain affects the brain.

The body is a dynamic set of constantly interacting chemicals. The nervous system is the most basic of these interactions. This is the basis for understanding physiology in general.

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