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How many you guys know the spine pretty
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good, kind of. Alright so let's talk
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about how to memorize some of the details of the spine. You got
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this big curvy thing with a lot of bones 7, 12, and 5. How many guys have ever heard
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7, 12, and 5? How do you guys remember 7, 12, 5, breakfast, lunch, and dinner. If we still
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lived in the 1950s you guys would wake up and have breakfast at seven. We'd all
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get a lunch break at 12, and you'd come home to dinner at five right. Now you
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guys are students, and I work all the time all over the place, so when do we
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eat? Whenever we can shove food in our mouths. I think that's when we eat.
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But if we go back to 7, 12, and 5, so we have seven what type of vertebrate,
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cervical vertebrae. So those vertebrae in blue there, are seven cervical
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vertebrae. What's special about the cervical vertebrae, where do they exist?
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The neck, those are your neck vertebrae. Alright 12, 12 12 12 12 12 ,12 refers to
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which vertebrae? The thoracic vertebrae. So I have 12 thoracic vertebrae. What's
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special about my thoracic vertebrae? They attach to my 12 ribs, making up my
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thorax right, and lumbar is where your low back is, where I have how many
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vertebrae? Five. You want to know a fun fact, how nerdy I am, you guys ready for
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this? This 7, 12, 5 scheme same for all mammals, you guys are like that's fun
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fact. Now let me explain, let me explain. A giraffe still has seven cervical
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vertebrae, how ridiculous is that, they're just like this tall, that's no joke. Seven
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cervical vertebrae in a giraffe, and then you look at a shrew. You guys ever seen a
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shrew? The thing has no neck, somebody attached its head to its
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shoulders. There's still seven cervical vertebrae. Whales still have a 7, 12, 5
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scheme. Their sacrum and coccyx are separated, but they still have the same 7,
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12, 5. I was in I think it's the Chicago Airport, and there was a giant skeleton
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of a brontosaurus. Of course so what do i do, I stop but I start looking at it,
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people must think I'm freaking crazy at this point right, there like what the
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heck is he doing, and sure enough i'm sitting there counting, i'm going that son
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of a bugs got seven cervical vertebrae, and he had all the same landmarks too.
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Like it was crazy, like the same transverse process, spinous process, like
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I could still point to the lamina, and all of those fun little anatomical things
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about vertebrates they were still there. So 7, 12, 5 a little more interesting
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now? Or no, now you guys just think I'm that much more nerdy. Guys should know my
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friends call me Sheldon, that's totally true. Alright, so we got low back lumbar
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vertebrae. We also have curves to remember in your low back lumbar
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vertebrae, You have a lordotic curve. You guys with me, so make that
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little letter association. Low back is your lumbar spine, and you have a
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lordotic curve, that's the inward curve. Now the opposite of lordotic curve is a
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kyphotic curve. Where do we find a kyphotic curve? The thoracic spine has
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a kyphotic curve. So what type of curve does the cervical spine have? It's another
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lordotic curve. So you have lordotic, kyphotic, lordotic. If you remember it
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from the bottom up, low back, lumbar spine, lordotic curve, you're in good shape. Now
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let's see if we can do this without me, and going to the next slide.
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What are the joint actions of my spine?
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Flexion, extension of my sagittal plane motions. Lateral flexion is my frontal
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plane motion, and then what's my transverse plane motion at the spine?
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Rotation. You guys nailed it, nailed it.
