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Lower leg, getting there, getting there. Gone
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a long way today, we're on like mild 24
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of our marathon. All right we got to talk about the ankle a little bit, because
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unfortunately is this word bank going to work for our ankle? No, now you guys already
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know enough to know that the ankle has its own set of joint actions.
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What type of joint is the ankle? It's commonly referred to as a hinge joint.
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That's a little deceptive but the ankle is also two joints not one. So you have
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this mortise is what it's called, it's like a mortise joint, that's another one
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of those construction things right, where you have like a one of these shapes and
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a tongue that goes into it that way. So you have the end of the tibia and the
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fibula, the lateral malleolus of the fibula coming down and basically
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blocking this part of your ankle joint into what plane? What plane can this
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actually move? Sagittal that's it right, but alright so that's the tibiotalar ,a
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talocrural joint. Then you have the subtalar joint which is your heel bone,
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your calcaneus on the talus. Does the fibular or the lateral malleolus of the
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fibula extend that low? No, so now what plane can this move in? Frontal it'll
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rock this way. Alright so we have sagittal here and frontal here, subtalar
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beneath the talus.
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Tibia, fibula, talus, calcaneus those are kind of the bones that make up our
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ankles. So we got some sagittal joint actions, and we got some frontal actions. Well I
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guess I actually could kill two birds with one stone here, and just make our
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word bank huh.
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So what can my ankle do in the sagittal plane? Plantarflexion and dorsiflexion,
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You guys are already way on top of it. Where do those terms come from, why isn't
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it flexion and extension? And you guys are right dr. Falinger steals all my
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stuff. Alright so dorsiflexion dorsal refers to top service, like the dorsal
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fin on a shark. dolphin! We're hardcore in this room. we're gonna refer to dorsal
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fins. It's going to be jaws, not some little dolphin. Shamu is a killer whale, it has
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killer in the name so that's that's ok, that's it in between, does funny shows
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but still a possible killer. Kills trick,
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kills trainers, all right kind of kind of coo,l I guess kind of cool not as cool as
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jaws, but more cool than a dolphin. All right so dorsal fin, yes I'm recording
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this on video and that that whole thing is just going to look like a weird aside,
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about my fascinations with fish that eat other fish, or in the case of killer
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whales and dolphins, mammals and now I've proved I watch way too much Discovery
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Channel. Alright so moving on we got dorsal fins top surface, flexion refers
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to two bones getting closer together, in this case it's the dorsal surface of the
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foot getting close to the tibia. Plantar flexion what is plantar refer to? The
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underside. Now how we get plant our flexion not really sure other than the
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calcaneus does actually come close to the tibia, your ankles more of a seesaw
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than it is like your elbow You guys cool with that. I always think like plant
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myself into the ground is plantar flexion and then dorsiflexion is coming
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up. You guys got that, now in the frontal
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plantarflexion as a rear is an actual word, it's just not used. Plantarflexion,
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dorsiflexion, frontal is actually eversion and inversion and this is
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subtalar joint actions. So eversion is what? Yes so eversion, well actually let's
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start with inversion because this I have a little cue to help me memorize this.
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Inversion is the sole of my foot facing inward. Inversion sprains happen more
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often right. Why do inversion sprains happen more often than eversion sprains?
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Okay if this is my left foot because the fibula blocks the talus, there's less
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stability this way. Yeah if you hear of an e-version sprain, which eversion now
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is the other way, foot flattening or beyond. If it goes beyond and you get
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an eversion sprain what often happens?
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Fibula fracture, not okay, not okay. Alright so we got inversion
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and eversion.
