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Arthrokinematics: Video #22 of Introduction to Functional Anatomy
Arthrokinematics Video #22 of Introduction to Functional Anatomy is an educational video that provides an overview of the principles behind the movement of joints. It covers the functioning of their surrounding muscles and the kinesiological roles of the ligaments, tendons, and capsule structures. This video addresses the concept of gliding and the various planes in which articulating joints operate, such as flexion, extension, and rotation. This video is an excellent resource for anyone wanting to gain a
Transcript
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We learned a lot of muscles now we got
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...blank
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to figure out how all of this stuff
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works together and where we're going to
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go with it as far as exercise selection
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so human movements science rule number
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one all systems will be involved in
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human movement muscular skeletal neural
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and fascial every once awhile I given
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this these arguments about well is that
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a fascial problem a muscular problem or
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an articular problem yes right all these
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systems work together they can't be
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divided out you guys know the rules of
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the human you already know the rules of
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the skeletal system we talked about that
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yesterday when we start talking about
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arthrokinematics and joints you start
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going a little deeper than we did
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yesterday it's not just bone to bone you
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start realizing that the shape of each
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of those bones and how they meet they
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capsule around that joint the ligaments
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cartilage synovial brum membrane
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articular discs bursa and those
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ligaments we talked about yesterday all
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affect how that joint moves the more
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knowledge you have about all those
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things the more you can potentially
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affect now yesterday we talked about
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osteokinematic motion this is just
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vocabulary guys osteokinematic motions
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are large joint motions motions of bones
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and we name osteokinematic
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motions flexion extension rotation you
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guys already know this stuff you just
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didn't know that those are osteokinematic
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motions arthrokinematic
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motions are small amplitude movements
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that happen between joint surfaces
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also not particularly complicated
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there's spin glide roll compression and
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distraction now in order to visualize
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these arthrokinematic motions all you
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really have to do is think of a cue ball
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on a pool table guys with me roll
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there's my table right if I told you to
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roll the ball what would you do it roll
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right and move in that direction arthrokinematic
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roll same thing if i told
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you to spin the cue ball what would you
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do yes you spin it like a top right so
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if this is the top of my table but I'm
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looking down at the cue ball how would I
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spin it how would it spin sure I could spin
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this way that's all spin is if I told
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you to glide the cue ball yeah you do
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that little like push thing with no spin
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or roll right so you just kind of shove
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it that way slide along the table if I
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told you to compress the cue ball you
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just mash it you just mash it into the
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table it probably wouldn't get very far
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but you'd mash it into the table and
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distraction what's distraction or
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traction yeah you just pull it away from
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the table now these are arthrokinematic
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motions do become very important when we
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start talking about joint motion because
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these things have to happen a certain
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amount together
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let's go back to the shoulder this is my
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glenoid fossa we're going to say this is
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my humeral head with my humerus
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sticking out we'll say this is a
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top-down view you guys cool with that
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what joint action would this be then
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horizontal adduction right I'm sorry
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just big joint action osteokinematic
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motion this would be horizontal
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adduction right we'll say we're talking
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about a bench press we're doing this
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right you guys can pretend that this is
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the elbow and then I have a ginormous
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400 pounds on this of course we're
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talking about my bench yeah so as I go
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into horizontal adduction what is my
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humeral head going to do it's going to
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roll right it's going to roll that's
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what it's going to do but what happens
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if he keeps rolling it's gonna fall out
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of the glenoid fossa not a great thing
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while you're doing bench press so what
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is my shoulder joint also have to do how
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is it going to stay centered in this
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joint it's got a glide and you're
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absolutely right to stabilize against
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that much load my rotator cuff might
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come in and compress to stabilize you
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guys going to see how that works
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together that's it that's arthrokinematics
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that's all it is it's just
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looking at these terms to see how we're
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going to keep a joint centered against
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another bone
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not terribly complicated right I think
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people like to try to make this
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complicated it's not that the problem
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can I erase this that looks fancy one of
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my better diagrams I think
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