Theo Von

and it's going to bind to the next, it's gonna park in a parking spot we call a receptor on the next nerve cell and trigger the activity of that nerve cell. Nerve cells communicate through electricity and chemicals. The chemicals stimulate electricity. And neurons can make the next neuron more active. They can make the next neuron less active. So this is important.

and it's going to bind to the next, it's gonna park in a parking spot we call a receptor on the next nerve cell and trigger the activity of that nerve cell. Nerve cells communicate through electricity and chemicals. The chemicals stimulate electricity. And neurons can make the next neuron more active. They can make the next neuron less active. So this is important.

In fact, a good kind of mechanical example is if you flex your bicep, you are inhibiting, you are preventing the neurons that flex your tricep. They are antagonistic muscles. And as just kind of a parallel where you can get to, when you, for instance, smell something you like, it's what's called an appetitive response. It's kind of appetite. That inhibits the repulsion response.

In fact, a good kind of mechanical example is if you flex your bicep, you are inhibiting, you are preventing the neurons that flex your tricep. They are antagonistic muscles. And as just kind of a parallel where you can get to, when you, for instance, smell something you like, it's what's called an appetitive response. It's kind of appetite. That inhibits the repulsion response.

In fact, a good kind of mechanical example is if you flex your bicep, you are inhibiting, you are preventing the neurons that flex your tricep. They are antagonistic muscles. And as just kind of a parallel where you can get to, when you, for instance, smell something you like, it's what's called an appetitive response. It's kind of appetite. That inhibits the repulsion response.

When you smell vomit or something really putrid, you tend to retract and it tends to shut down at the same time the circuits that would bring you closer to something. So, you know, every circuit in the brain is like that. There's a push and a pull, an accelerator and a brake. And if you do want to. It limits the other. Yeah. Think of it like a seesaw. One goes up, the other goes down. Got it.

When you smell vomit or something really putrid, you tend to retract and it tends to shut down at the same time the circuits that would bring you closer to something. So, you know, every circuit in the brain is like that. There's a push and a pull, an accelerator and a brake. And if you do want to. It limits the other. Yeah. Think of it like a seesaw. One goes up, the other goes down. Got it.

When you smell vomit or something really putrid, you tend to retract and it tends to shut down at the same time the circuits that would bring you closer to something. So, you know, every circuit in the brain is like that. There's a push and a pull, an accelerator and a brake. And if you do want to. It limits the other. Yeah. Think of it like a seesaw. One goes up, the other goes down. Got it.

You know, everything from, if you step on a pin, you move your foot up and guess what? What happens? Your other leg automatically extends. Yeah. Okay. This is called the monosynaptic stretch reflex. If you touch a fish on the side, there's a big old neuron, giant neuron called the Moudner neuron. And what does the fish do? It heads in the opposite direction.

You know, everything from, if you step on a pin, you move your foot up and guess what? What happens? Your other leg automatically extends. Yeah. Okay. This is called the monosynaptic stretch reflex. If you touch a fish on the side, there's a big old neuron, giant neuron called the Moudner neuron. And what does the fish do? It heads in the opposite direction.

You know, everything from, if you step on a pin, you move your foot up and guess what? What happens? Your other leg automatically extends. Yeah. Okay. This is called the monosynaptic stretch reflex. If you touch a fish on the side, there's a big old neuron, giant neuron called the Moudner neuron. And what does the fish do? It heads in the opposite direction.

These circuits have been selected for because the dumb fish that went toward the thing that touched it probably got eaten. So all these responses are hardwired responses. This chemical dopamine exists in a couple of different places in your brain. It has several roles. The most important ones to know about are that it's involved in generating movement.

These circuits have been selected for because the dumb fish that went toward the thing that touched it probably got eaten. So all these responses are hardwired responses. This chemical dopamine exists in a couple of different places in your brain. It has several roles. The most important ones to know about are that it's involved in generating movement.

These circuits have been selected for because the dumb fish that went toward the thing that touched it probably got eaten. So all these responses are hardwired responses. This chemical dopamine exists in a couple of different places in your brain. It has several roles. The most important ones to know about are that it's involved in generating movement.

People with Parkinson's lose the neurons that create dopamine. in an area called the substantia nigra. If you were to cut open a human brain, you'd see two dark areas at the bottom of the brain. And in Latin, nigra, dark, black, is down at the bottom of the brain. And those are the neurons that degenerate. And there's a picture of it, but maybe we can find, it's really impressive.

People with Parkinson's lose the neurons that create dopamine. in an area called the substantia nigra. If you were to cut open a human brain, you'd see two dark areas at the bottom of the brain. And in Latin, nigra, dark, black, is down at the bottom of the brain. And those are the neurons that degenerate. And there's a picture of it, but maybe we can find, it's really impressive.

People with Parkinson's lose the neurons that create dopamine. in an area called the substantia nigra. If you were to cut open a human brain, you'd see two dark areas at the bottom of the brain. And in Latin, nigra, dark, black, is down at the bottom of the brain. And those are the neurons that degenerate. And there's a picture of it, but maybe we can find, it's really impressive.

You can see even without a microscope, if you just say, I don't know if you said like actual brain tissue or something, There you go, look. So see that first one, look at that. That's probably without any staining. You're just looking at the brain with no microscope. In Parkinson's, those degenerate. You can see it on the right.

You can see even without a microscope, if you just say, I don't know if you said like actual brain tissue or something, There you go, look. So see that first one, look at that. That's probably without any staining. You're just looking at the brain with no microscope. In Parkinson's, those degenerate. You can see it on the right.

You can see even without a microscope, if you just say, I don't know if you said like actual brain tissue or something, There you go, look. So see that first one, look at that. That's probably without any staining. You're just looking at the brain with no microscope. In Parkinson's, those degenerate. You can see it on the right.