The axon is the part of a neuron that carries signals up to the brain. These signals travel through the axon before they can reach the brain.
The brain has a certain number of axons, so when you have a lot of information in your brain, you can’t easily get it out. By bundling a lot of information into a single axon, you can increase the amount of information traveling from cell to cell. So instead of having to send a lot of information through a bunch of different axons before reaching your brain, you can send it all through one big one.
If this is correct, then there are two major components to a brain: the axons and the synapses. If you have a lot of data in your brain, a lot of axons are going to be involved, and these axons have to cross each other in order to get to your brain. You can think of this as a big computer with lots of axons. When you have a lot of information, the bigger your axon is the more data you want to send.
Axons are the wires that carry information in your brain, and synapses are the connections between them. As you know, we often only think of axons as a big computer with lots of axons. But axons can also be a lot bigger than this. When you have a lot of data, your axons can be very long. And that means we have a lot of wires that are attached to one another to get data through.
Now for the good news. The axon is a very small part of axon bundle. You can have 10,000 axons (which is like the size of a human hair) and still only have a few axon bundles connected to each other. Axons are actually made from different cell types. Some are nerve cells, others are muscle cells, and some are glial cells. And each of these different cell types is made up of different types of nerve cells.
When we talk about axons, we mean the axons we normally see in the brain. For the brain, they actually have only a few connections. The ones that we see are called corticospinal neurons. They connect to the motor neurons in the spinal cord. The motor neurons are actually similar to the ones we see in the brain, but they are special in that they only connect to one muscle.
In most mammals, these spinal motor neurons are the ones that control the muscles to move your arms and legs. In humans they are called anterior-polaris neurons. In dogs, they are called peroneal neurons.
In humans, the primary motor cortex (PMC) is where the information about the motor neurons is sent. This is where the motor cortex sends its commands to the spinal motor neurons. The PMC is actually the hub of most of the information that the brain sends to the spinal cord.
There are two major types of axons: short- and long-axons. Short-axons are the ones sending information from the motor cortex. Long-axons are axons that travel to and from the spinal motor neurons. Long-axons are the ones that ultimately send information about the muscles to the PMC.
While the motor cortex is responsible for sending commands to the spinal motor neurons, the PMC does most of the work of actually sending commands to the muscles. It is in the PMC that the axons that send information to the motor neurons are bundled into the cables that we call axons.