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BIOL 2301 Human Anatomy & Physiology I - BIOL2301_lecture13_0626
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00:02 How's everyone doing this morning? Pretty . All right, we have one
00:10 week of class. That sounds Yeah, that's, that's kind of
00:16 . And what we're gonna do I'll turn that on. What we're
00:20 do today is we're gonna go back the central system and we'll do a
00:24 little break in the peripheral nervous but we're gonna go back in the
00:27 nervous system and we're gonna look at the parts of the brain.
00:31 when you were a kid, did guys watch Animaniacs? No.
00:36 is that, am I too old ? But you know what animating
00:39 right? No. Echo Wacko and Oh, my goodness. You guys
00:47 led a deprived youth. It's so . Right. I want you to
00:52 this down. You don't need to look at it right now. Look
00:55 pinky in the brain. Singing parts the brain right now. Ani Maniax
01:03 a cartoon series, um, owned Warner Brothers, done by Steven
01:08 Um, it was actually, I , oh, that's right. You
01:12 have been alive. Oh, my . I mean, I was in
01:17 school when this stuff was coming But it was like, when like
01:22 nineties. So I forget you guys young, young. Like,
01:26 we're like in a whole different But anyway, um, back in
01:32 day part of daytime cartoons had to an educational bent. So they had
01:38 have something that made it so that show was educational. And so,
01:42 , if you watch some shows, G I Joe and Transformers back even
01:47 , they'd always have, like, the end of the show, what
01:49 make fun of now is like, more, you know, or kids
01:53 sure you don't do drugs, that of type of stuff. Right.
01:56 , but they had a maniacs, were just ridiculous. It was a
02:01 show and purposefully so, and so would do things like the parts of
02:06 brain and they would list out all parts of the brain or there was
02:09 song that they sang all the countries the world. Yeah. Right.
02:18 . And so they have, and the other thing was every show had
02:21 have some sort of like, reason they had the show. And so
02:24 had the wheel of morality. So spread the wheel. Today's lesson
02:30 it was just, it was silly it was meant to be silly
02:34 but it was kind of a flipping the, off the, off the
02:37 and off the, you know, people who were like, made the
02:40 for children's cartoons. It was really for adults by adults for the purposes
02:46 showing the kids. Because they would if you ever, if you ever
02:50 to go on a strange long find an ani maniac videos on youtube
02:55 just watch them. It is worth . They won Emmy after Emmy after
03:00 . It is hilarious stuff. All . Anyway, why I went on
03:05 bent, why I went crazy there because we're gonna be doing the same
03:09 . We're going to be going through parts of the brain. All
03:12 Um, and I will point out , so some of the things we're
03:17 to do is just, it's just be, here's the part of the
03:19 . This is the part that you know. This is what it
03:22 So there's a real easy way to go through this first deal with the
03:26 picture. Like, what am I at? So, for example,
03:29 we're like, here's a cerebrum, is its job? Generally speaking?
03:33 then focus down word on. here's the part of the cerebrum that
03:37 blank. All right. That's, probably the easiest way to do
03:41 So when we run through it don't overwhelmed by, oh my goodness.
03:44 a whole list of stuff. Think picture, work your way down.
03:47 will help you understand this and what looking at here is we're going to
03:51 with the cerebrum. This is what , when we think of the
03:53 this is what we think about is . But that isn't the only part
03:57 the brain, the brain actually consists multiple parts. But with regard to
04:00 cerebrum, we, we recognize this . And the reason we recognize this
04:05 is because it, it's so It has these folds and these grooves
04:09 part of that is a function of development, the brain is bigger than
04:14 cranium itself. So it has to on itself. And so it creates
04:18 these bumps and stuff that you see because that is the way that the
04:24 fits into the space that it grows . And what we have is we
04:29 these anatomical landmarks. And so anatomist these to help other anatomist identify what
04:35 looking at. And so in a generic way we're not going to go
04:39 name each specific one. There are that we will name, but when
04:43 hear the word gyrus, what you're at is the bump portion, that's
04:46 elevated ridge, that's the portion that of bulges outward. So this would
04:51 the gyrus and then the little space the gyrus is that's a sulcus,
04:56 right. So that's the groove, a depression and it doesn't go very
04:59 . It's like this, right? what distinguishes the circus from the next
05:04 , a fissure. So here's an of a fissure. Here's a fissure
05:08 that the fissure goes deep. It's goes way down. You can actually
05:12 it apart and you'd see the two would be rather large. So you
05:17 see here, here's a fissure, goes almost all the way through.
05:19 you could actually pull that apart and see where it's connected deep down,
05:23 is about four or five inches or four inches, three inches in from
05:28 it is. So these terms have specific meaning. And remember when we
05:32 talking about the spinal cord, I , this side is the,
05:35 the sulcus, this side of the . I said, I don't know
05:38 they, why they change it because depth of both those are about the
05:42 . But I think it is just make it easier, easy to
05:44 All right. So we use these help us identify where we're looking.
05:52 , always forget that I have to a button over here first time.
05:56 right. So the brain itself has major regions. All right. And
06:02 not these four colored regions. This just a picture I picked out.
06:05 we have a cerebrum, we have diencephalon that you can't see in this
06:09 . We have the brain stem which connected down here to the spinal
06:13 And back here, we have the brain called the cerebellum. All
06:16 That's literally what it means. So is the big brain, cerebellum is
06:19 little brain. All right. when I graze something out that usually
06:25 , really? Are you just not work for me today? Come
06:30 Oh, because I'm an idiot when doesn't work. Just say Doctor
06:34 you're an idiot. You didn't plug the little antenna now. All
06:41 when I grate something out, that's so that we're focusing in on that
06:44 term here. right? So the thing I want to point out is
06:48 we have these four major regions, also have, when we're looking at
06:51 cerebra, it's actually a mirror image itself. It's divided into two halves
06:56 are called hemispheres. The best picture could find is this one to be
07:01 to see here, you can see cerebrum you can see here's one,
07:04 the other. So we have a and a right. So there's your
07:07 , there's your right two cerebrums. , while they look the same,
07:10 not actually 100% the same, which going to deal with them a little
07:14 . All right. But that's the thing is that you do have kind
07:17 this mirror image look. And when we look at each of the
07:21 hemispheres, we're going to see that are five lobes. Now, the
07:27 here has four and then one grayed . And the reason it's grayed out
07:30 this particular case is because you can't that fifth lobe. And back when
07:34 was in your seat, we didn't the name the insula, we just
07:38 the four lobes. So it just of shows you that anatomy still does
07:44 as people define and redefine stuff, the lobes themselves are particularly hard.
07:49 right, remember, we learned about frontal bone, that's where the frontal
07:52 is located, right. We learned the parietal, the parietal lobe is
07:57 underneath the parietal bone. And then occipital lobe is behind the occipital
08:03 And the temporal bone sits on the the temporal lobe sits on the
08:08 So we have those being located in , in the places where we expect
08:12 to be. And you can
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