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Current time:0:00Total duration:5:18

Video transcript

imagine if it was pitch black in your room would you be able to walk as long as nothing got in your way you'd probably be able to walk perfectly fine but why is this when walking in a pitch-black room you rely on your sense of balance you know exactly where you are in space you know whether or not you're standing straight up or if you're sitting down and as you're walking you know if your right foot is in front of your left or your left foot is in front of your right so how is it that we know exactly where our body is in space without actually having a look at it well this is known as our sense of proprioception so proprioception and proprioception is basically defined as our ability to sense exactly where our body is in space in other words this is our sense of position in this sense actually originates from a bunch of tiny little sensors that are located throughout our entire body and almost all of our muscles so let's imagine that this right here is a muscle in your leg or in your arm legisla it's a muscle in your arm so there's a tiny little receptor in it inside of the muscle and this receptor will actually go up to your spinal cord and then eventually to your brain and this receptor if we kind of zoom in on it we zoom in on this receptor is sensitive to stretching so as this muscle contracts so if I was going to lift something really heavy the muscle would contract and it would get thinner so it would look like this we get bit thinner and so this sensor which is known as a spindle I'll write that down here this is a spindle this sensor can sense that the muscle has been stretched out and it too will also stretch so it will go from this conformation to this conformation it will get I can actually get stretched out and so we can draw a little spring-like structure inside which is actually quite similar to what surely inside the spindle there's actually a protein inside they get stretched when that protein gets stretched it fires a signal to the brain this is the basic principle behind proprioception so we're able to tell exactly how contracted or how relaxed every single muscle is in our in our entire body and this allows us to know exactly where our body is in space there's another word that's commonly used to talk about your body's movements and this is known as kinesthesia so let me write that down kinesthesia and so if we talk about proprioception to include your body's position in space as well as your ability to balance so your sense of balance would be included under proprioception kinesthesia is talking more about the movement of your body so one final way to differentiate between the two is that proprioception can be thought of as a cognitive awareness of your body in space so it is more cognitive so one way to think about this is that it's a little bit more subconscious so you're not always thinking about exactly where your body is in space exactly how you're oriented if you're walking or if you're running you're your main concern isn't oh I hope you know it might be but your main concern is that I hope I'm going to I'm not going to fall down pretty much your sense of balance your sense of position are pretty well taken care up by your proprioceptive sense so it's more cognitive it's more something that's under under the surface you're not overtly thinking about it on the other hand kinesthesia is is a little bit more behavioral behavioral and what I mean by that is let's imagine that you're playing golf or you're trying to hit a baseball you're constantly you're swinging sometimes you miss sometimes you hit the ball but every single time you actually swing the bat or swing the golf club your body is able to detect exactly how it's moving and so over time if you learn that okay if I move in this certain direction I'm able hit the golf ball or if I move in this direction I'm able to hit the baseball then over time your body is able to detect exactly what that movement is and start to undergo that movement more and more often so you're able to actually teach yourself exactly how you should move in order to successfully complete whatever task is at hand so that's just another way to distinguish between the two terms but just keep in mind that proprioception and kinesthesia are not the same so they are not the same so I'll draw a big X here but they do share a lot in common and what they do share in common is inferring movement and position and where your body is in space and the big difference is just to kind of summarize is that proprioception is concerned with position walk anesthesia is concerned with movement and proprioception includes your sense of balance while kinesthesia does not