 It is time for cranial nerve fun times. Does this look familiar? This is the inferior surface of the brain. This is looking at the brain from the bottom side. Can you identify any brain parts? Like this one right here. This is my pons. Does it look familiar? This is medulla oblongata, also known as MO. Here is cerebrum. So we're just looking at the bottom side of a brain. Check it out. Here's spinal cord with my little butterfly. Fly away butterfly. Don't fly away butterfly. Oh dear. Let's name all of our cranial nerves. The good news is that they're all named from anterior to posterior. And anterior is the front. Oh, right here. That's cranial nerve number one. I don't know if this is good news or bad news for you, depending on whether or not you learned roman numerals in your life ever. You have to know the number of the cranial nerve and it's a roman numeral number. And yes, you have to know the roman numeral number. Cranial nerve number one is the olfactory nerve. And this is it right here. Cranial nerve number two is the optic nerve. And again, these are all coming in pairs. So here's the optic nerve. Cranial nerve number three is the oculomotor nerve. Guess what? They all carry certain kind of fibers and do something specific. But we're going to sort them out and deal with those specific functions in the next set. So we're just identifying them right now. Guess who this is? Oh, you guys are so smart. It's number four. Number four is trochlear. Number five is the big guy. The big guy is trigeminal. We're going through there. Six is abducens. That says abducens. Seven. Seven is this guy right here. Seven is facial. And we'll talk about each of them specifically in a second. Eight. Eight is vestibulocochlear. Yes, watch this. Vestibulocochlear. That actually tells you all of its functions. The name does. Nine. Oops. We know that this is nine. Nine is glossopharyngeal. Pharyngeal. Ten is a big one. Vegas, not spelled like the town. I probably will notice that and take off points. Eleven, accessory. Doesn't it kind of look like a little necklace? Yes. And 12, okay. All of them totally work for me until we get to 12. All the pictures show 12 being like really it comes back. This is always a little bit disturbing for me, but that's cool. It is hypoglossal. Hypoglossal. Now, talk about the most glorious sorting question ever with cranial nerves. That's cool. There's something else that I need you to do. I look at this and I just go, ugh, I highly recommend being able to draw it. That's what I'm going to do for you. I'm going to draw it right now. And we're going to relabel, maybe we'll just do the numbers, all of them. Now watch. We're going to keep this picture here for reference, but I need some space. I'm going to make my pawns a little green bubble, like this. Remember how we drew our spinal cord? And you were like, I really do have to draw it that many times. And has it been on like every single quiz since you were instructed how to draw your spinal cord? So yes, you should know how to do it. This might be a similar type question. See my medulla oblongada? It's blue. Watch this. Look at how I'm going to do this thing. I'm going to do like, it's going to go like this. One, two, three, four. It works for you, doesn't it? And then we can even do like lines. Do you see my lines in this over here? Here's one, two, three, four. This is my medulla. And eventually hopefully this is like, oh yeah, I can totally draw this thing. Guided drawing. So cool. That's all we need. Those are the structural parts. Then we know that all the rest of this surrounding here is all cerebrum up here. Okay, ready? We have our cranial nerves and they go like this. We got to have like a little antenna. That's one. Then what does two look like it does? Two makes a little crisscross underneath there. Right? There's two. Okay, let's do three. Look at three. Three comes out of the ponds. And so three can be right there. About four. I wonder if I'm going to run out of colors here. I'll make four this lovely color. Four comes out on the side. Like little arms. And five is a big guy. Five does something like this, like really big arms. And you'll see why, because it actually has three parts. Does that work for you? Now we're going to go to six and six. Look, it's going to look like this. It comes right out of the medulla. Now, I say it comes right out of the medulla. What you have to remember is that these are just pathways and they actually have their cell bodies are somewhere in brain tissue forming a nucleus. And we could actually track all the nuclei for each one of these cranial nerves which would be you would love me. You already love me, don't you? Of course you do. Let's do number seven. Seven. I lost track of myself. Seven comes out here on the side. And again, it's nice because they all come out in order. Let's do eight. Eight comes out next. Still kind of surrounded by ponds. Nine. That is nine right there. Nine is next. Again, I'm cool. Piece of cake. Nine is coming out on the edge here. One. There's nine. Maybe we'll make it a little thicker because it looks like kind of a thicker one. Ten. This is a big one, an important one. Shall we make it bright yellow? The vagus nerve. And then 11. What is that one that looks really cool? Dude, they all look cool. Having a hard time deciding on colors. It looks something like this, right? Do you see that? That's number 11. And then we have 12. 12 comes back. I'm going to make 12 black. 12 comes back and comes out of here. All right. If that hurt your head. If that process was like, oh my lordy, really? Whatever. That, I think, is, I think it's important to be able to visualize it and draw it in order. And it isn't an overwhelming image that you have here and it helps you put them in order and imagine them as such. If you can do that, you are awesome. Now, we're going to sort our cranial nerves. And the first group that we're going to look at is all the cranial nerves that just have sensory fibers. That's it. Only sensory information is traveling through these cranial nerves. That's our first group.