“The brain consumes a vital amount of energy.”
– Dr. Rodney Hulbert (05:46-05:49)


The nervous system is incredibly complex. It’s amazing to see how it controls the body, including our movement, our thoughts, and our emotion. In this week’s episode, Dr. Rodney Hulbert talks about the five core concepts of the nervous system anatomy and physiology.


Part One of ‘Nervous System Anatomy and Physiology (5 Core Concepts)’


Let’s talk about the peripheral nervous system and the central nervous system. They are responsible for optimal body performance and health. The central nervous system is simply the brain and the spinal cord. The peripheral nervous system is everything else. That includes your arms, legs, and organ systems in your chest.


“Central nervous system has two systems that both play an important role
in our everyday life.” – Dr. Rodney Hulbert (03:06-03:13)


Your cranial nerves are part of the central nervous system. That includes your senses. When looking at these systems in play, both of them are necessary for the body to function correctly. What do communication pathways look like? How does that work? Well, a nerve impulse is a chemical reaction. 

When you hear about electrolytes, it’s imperative to maintain a balance of them in your body. This helps your brain function. It helps the expression of human thought through the muscles of the face and sounds made by the lips and movement of the mouth. 

That’s just a small part of it. The peripheral nervous system allows you to close your eyes, touch your nose or any other actions. Your brain has to constantly communicate with your arm, the muscles within, and the sensory component of your fingertips. 

Here are a couple of examples. Your arm is moving – that’s motor skills. Your finger is touching, that’s a sensory skill. You can sense if you’ve touched your nose.  You know what’s going on. That’s a deeper level within the nervous system. 

The central nervous system is made of up parasympathetic and sympathetic parts. Your parasympathetic nervous system maintains and restores your energy. When you feel relaxed, when you have no worries or concerns, that’s your parasympathetic system at work. Think hanging out with friends, or spending time with your children. 

Now, look at the sympathetic system. This is the fight or flight. If there’s a bear chasing you, you’re going to run away as fast as you can. The blood from your body is going to push your muscles. When people get upset with road rage, that’s another example. 

Those aren’t our best moments, but they do exist. It’s important to understand the central nervous system breaks down into two additional systems. They are consistently important in everyday life.


Part Two of ‘Nervous System Anatomy and Physiology (5 Core Concepts)’


Let’s talk about heart rate. Let’s say I’m in a fight for my life. My brain will tell my heart to push all the blood to my extremities. The body isn’t digesting food. It’s not concerned about reproducing. All it cares about is getting air; blood to the muscles, or if we can fight to get free. And it’s incredible what the body can do. Anyone who’s had a severe injury can understand.


“It’s very critical that you take care of your nervous system.” 
– Dr. Rodney Hulbert (08:48-08:51)


During the initial part of shock, after a severe injury, you might ask yourself, did that really happen? Then, you assess the damage. Depending on the individual, some may faint. Others may go into action, or yell for help. That’s how the body will respond to injury. 

When the heart is overworked, we need to calm those muscles. Otherwise, there will be damage to the heart. To compensate, the body will start to relax. It’ll calm itself down, hoping that you’ve gotten away from your threat. That’s an important example of how organ tissue works with the brain. 

The brain itself is the control center. It’s a big mass of gray matter. It works with the central nervous system and the peripheral nervous system. This allows our spine to respond and move. That central nervous system controls how we operate. Are we in fight mode, flight or relaxing? If we examine the brain further, it controls voluntary movement, the ability to stand, the ability to walk. All of these are critical for the brain and how it functions. 

Headaches can be caused by a low brain blood supply. This irritates nerves that go around the brain or the skull. The symptoms show up as improper bodily functions. The brain and nervous system have to calibrate all of these. The body will respond accordingly. 

The brain can decide based on emotion to have a sensation within the body. It’s critical to take care of your nervous system. Take care of your body, and make sure to fuel it properly. Make sure that you get proper movement to help sustain it. And most importantly, make sure that you’re getting regular chiropractic adjustments.


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