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Hate when they do this, we learned all
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these joint actions and they go yeah but
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for this joint make up some words, you're going to have
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to deal with it. Alright so this is my ankle, all right i got my tibia, my fibula,
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talus, my calcaneus. You guys heard of these bones? A little bit. Alright so
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your heel bones, your calcaneus, your talus is kind of in between your shin
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bone and your calcaneus shoved in there. Everybody's cool with that? Everybody
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move around their ankle a little bit. Do you have sagittal plane motion of the
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ankle? Yeah we set a calf raise with sagittal plane motion. Right the problem
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with the ankle is is they don't call that, you don't, you would expect sagittal
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plane motion at the ankle to be what and what? What two joint actions? Flexion and
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extension. Unfortunately somebody decided to get clever and name both of them
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flexion. What the... I didn't come up with this. What you do have is dorsiflexion
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and plantar flexion. You guys heard those terms? Dorsi kind of sounds like what? This is
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our first clue, dorsal fin all right. What's the dorsal fin of my foot? Top surface.
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So dorsiflexion is probably going to be what? Yeah the top surface of my foot
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coming closer to my shin. A plantar, does anybody know what plantar refers to?
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Bottom right, to the plantar surface of my foot is the bottom. So plantarflexion
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is going to be in which direction? Yeah I think about planting myself into the
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ground. Does that help? Plantarflexion is like trying to plant yourself into the
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ground. So what exercise would be plantarflexion? Calf raises which was on our
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sagittal plane chart, which I erased, I'm sorry. Dorsiflexion let me see.
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Dorsiflexion guys, do we use dorsiflexion? Yeah really important job actually. If
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you don't dorsiflex, you don't pick up your feet. What do you do? You shuffle
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right. You ever seen like lazy walkers and they like don't dorsiflex right.
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We need dorsiflexion so that we can clear our foot,
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and then we go through plantarflexion for a push off. Now do we just move in
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the sagittal plane with our ankle, no we also have a little bit of, mmm i'm going
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to call it frontal plane for now. Alright we have a little bit of this, you
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guys with me. Now what those joint actions are called are inversion and
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eversion. Now inversion is the soles of your foot facing inward, all right so
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everybody get into inversion. If you get into inversion what's on the floor kind
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of the outside of your foot right, alright like your pinky toe and your fifth
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metatarsal at the outside of your foot. If I evert now what's on the floor yeah
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the inside of my foot, my big toe, my arch collapses right, if I try to evert. How
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do most ankle sprains happen? Inversion, most people roll their foot outward. How
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do most people walk around though. With too much what eversion. How many of you
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guys see with people like walking around really flattened out, and a little turned
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out? Yeah a lot of eversion out there. Alright so everybody's got inversion,
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eversion. Now pronation and supination we're going to stay away from right now
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for our analysis today. I know you guys have heard those terms. They're not as
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simple as people make them out to be. There a little confused. I would not
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suggest going to your local Foot Locker and getting an analysis on whether
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you're a pronator or supinator. It's not a good idea right, those people have less
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education than you guys do in anatomy, and they're trying to tell you what's
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wrong with your feet. Alright if you really think you got something wrong
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go see a podiatrist, or physical therapist, somebody with a little bit
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more training. Alright pronation is eversion, abduction, and external rotation
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together. Supination is inversion, adduction and
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internal rotation together. When you guys get into more of your advanced
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kinesiology classes you'll talk about why that happens. For now you guys got
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two planes to worry about, sagittal plane what joint actions do I have ? Plantar
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flexion and dorsiflexion. Everybody dorsIflex for me, everybody plantar
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flex for me. What exercise includes plantarflexion? Calf raise, all right.
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Eversion and inversion happens in what plane? Frontal plane. Most people sprain
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their ankle doing inversion, and most people walk around with a little too
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much eversion, beautiful.