Brain and Nervous System

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6 Ways to Strengthen Your Nervous System
Warren McCulloch and Walter Pitts proved in that even artificial neural networks formed from a greatly simplified mathematical abstraction of a neuron are capable of universal computation. Chelating critical minerals and stuff like this. All other types of animals, with the exception of echinoderms and a few types of worms, have a nervous system containing a brain, a central cord or two cords running in parallel , and nerves radiating from the brain and central cord. The large majority of the axon bundles called nerves are considered to belong to the PNS, even when the cell bodies of the neurons to which they belong reside within the brain or spinal cord. Specifically the protein BMP4 appears to be involved.

Neuronal development

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A tale of two cannabinoids: The therapeutic rationale for combining tetrahydrocannabinol and cannabidiol Activity of cannabis in relation to its delta'-trans-tetrahydro-cannabinol content An entourage effect: Potential Role of Endocannabinoids Signaling Lasting impacts of prenatal cannabis exposure and the role of endogenous cannabinoids in the developing brain Multiple Roles for the Endocannabinoid System During the Earliest Stages of Life: Basic science perspective and potential clinical applications.

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Cannabidiol decreases the "drug-seeking behavior". The opposite of a "gateway drug". A study of adults who participated in the U. The hindbrain sits underneath the back end of the cerebrum, and it consists of the cerebellum, pons, and medulla. The cerebellum — also called the "little brain" because it looks like a small version of the cerebrum — is responsible for balance, movement, and coordination. The pons and the medulla , along with the midbrain, are often called the brainstem. The brainstem takes in, sends out, and coordinates all of the brain's messages.

It is also controls many of the body's automatic functions, like breathing, heart rate, blood pressure, swallowing, digestion, and blinking.

The basic functioning of the nervous system depends a lot on tiny cells called neurons. The brain has billions of them, and they have many specialized jobs. For example, sensory neurons take information from the eyes, ears, nose, tongue, and skin to the brain. Motor neurons carry messages away from the brain and back to the rest of the body. All neurons relay information to each other through a complex electrochemical process, making connections that affect the way we think, learn, move, and behave.

When you learn things, messages travel from one neuron to another, over and over. Then the brain creates connections or pathways between the neurons, so things become easier and you can do them better and better.

In young children, the brain is highly adaptable. In fact, when one part of a young child's brain is injured, another part may learn to take over some of the lost function. But as we age, the brain has to work harder to make new neural pathways, making it more difficult to master new tasks or change established behavior patterns.

That's why many scientists believe it's important to keep challenging your brain to learn new things and make new connections — it helps keep the brain active over the course of a lifetime. Memory is another complex function of the brain. The things we've done, learned, and seen are first processed in the cortex, and then, if we sense that this information is important enough to remember permanently, it's passed inward to other regions of the brain such as the hippocampus and amygdala for long-term storage and retrieval.

As these messages travel through the brain, they create pathways that serve as the basis of our memory. Different parts of the cerebrum are responsible for moving different body parts. The left side of the brain controls the movements of the right side of the body, and the right side of the brain controls the movements of the left side of the body. When you kick a soccer ball with your right foot, for example, it's the left side of your brain that sends the message allowing you to do it.

A part of the peripheral nervous system called the autonomic nervous system is responsible for controlling many of the body processes we almost never need to think about, like breathing, digestion, sweating, and shivering. The autonomic nervous system has two parts: The sympathetic nervous system prepares the body for sudden stress, like if you see a robbery taking place.

When something frightening happens, the sympathetic nervous system makes the heart beat faster so that it sends blood more quickly to the different body parts that might need it.

It also causes the adrenal glands at the top of the kidneys to release adrenaline, a hormone that helps give extra power to the muscles for a quick getaway. This process is known as the body's "fight or flight" response. The parasympathetic nervous system does the exact opposite: It prepares the body for rest. It also helps the digestive tract move along so our bodies can efficiently take in nutrients from the food we eat.

Your eyes may watch as your best friend walks toward you — but without the brain, you wouldn't even recognize her. Pepperoni pizza sure is delicious — but without the brain, your taste buds wouldn't be able to tell if you were eating pizza or the box it came in. None of your senses would be useful without the processing that occurs in the brain. Because the brain controls just about everything, when something goes wrong, it's often serious and can affect many different parts of the body.

Inherited diseases, brain disorders associated with mental illness, and head injuries can all affect the way the brain works and upset the daily activities of the rest of the body.

A tumor is an abnormal tissue growth in the brain. A tumor in the brain may grow slowly and produce few symptoms until it becomes large. Or a tumor can grow and spread rapidly, causing severe and quickly worsening symptoms. However, nerve and muscle cells are permanent irreplaceable losses and much more serious. What about body builders? Fundamentals of the Nervous System and Nervous Tissue.

Nerve cells shows more variation in shape than any other cell in the body. The cell body is the area where the nucleus is. Axons are easier to define and we could say they always terminate into synaptic knobs. The axons are what conduct action potentials away from the cell body. These neurotransmitters are how information is passed through the nervous system.

It is not a flow of electrons electricity that is being conducted through like a piece of metal. This axon also has myelinating cells wrapping around it. Between the myelinating cells are these gaps called Nodes of Ranvier. The cell body is where the nucleus is. The branches off the cell body are neuronal processes. How many neuronal processes off the cell body exist off this nerve? This has nothing to do with bipolar disorder manic depression.

How do we label the axons? We know they are axons if they have terminating knobs? The axon is easy to define. The dendrite is harder to define. Where is this cell bipolar cell found? In fact, during embryonic development, the eyes grow directly right out of the brain. Whats the cell body? How many neuronal processes are coming off the cell body? The axons are easy to define because the axons have the the terminating synaptic knobs.

Almost all the books call this a unipolar neuron and some books call it a pseudobipolar nerve. Notice the cell body. This is a very important nerve because ALL motor neurons have this shape and many interneurons we will explain interneurons soon.

These neurons transmit information from the skin or skeletal muscles to CNS. If you wiggle your toes, you will feel sensations from your skin and skeletal muscles contracting and relaxing.

What is the nervous system?