Why You Have a Kneecap and How it Unleashes Your Quads
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- เผยแพร่เมื่อ 22 ก.ค. 2024
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Why You Have a Kneecap. In this video Jonathan discusses the function of the kneecap and how it relates to muscle strength.
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In this video, Jonathan from the Institute of Human Anatomy discusses the anatomy of the patella, as well as its overall purpose.
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Video Timeline
00:00 - 00:41 Intro
00:42 - 01:24 Basics of the Patella
00:43 - 03:45 Does It Protect the Knee Joint?
03:46 - 05:29 Bones Can Grow INSIDE of Tendons?
05:30 - 06:10 Meet the Quadriceps!
06:11 - 07:27 The Quadriceps Tendon
07:28 - 08:22 The POWER of Leverage
08:23 - 10:58 Whiteboard Session With Jonathan
10:59 - 12:58 The POWER of Scientific Thinking
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Audio Credit: www.bensounds.com
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#Patella #Knee #HumanAnatomy
Who else feeling their kneecap while he's showing it lol
Me, especially since back in 2017 I accidentally dislocated my right knee
If by kneecap you mean balls then me
@@SoulDelSol 💀💀💀
Is that a real Ham?
@@SoulDelSol am confusion
Please do a spine dissection which shows discs, the sciatic nerve and how it can get pinched and cause sciatica. Very educational channel. keep up the great work!!
Good idea
Sciatica is hell on steroids
Yes please!
As a person that has extreme spinal issues and 2 back surgeries one of which which was multi level fusion. I would love to see this!! I suffer from sciatic issues so terribly I cannot tolerate any sitting without being in extremen agony. I’ve recently lost all sense of feeling to touch between both SI joints.
Please!!! Ive also suffered from sciatica in the past and it would be an amazing educational video to learn more about the condition!!!
The patella's sole purpose is to make as much noise as possible while climbing the steps.
I though that those sounds that it makes while moving are dangerous sign. Suffering from patella injury & ligament issues 😔😞
I hear you 😄
waitt your patella is making noises?
mine cracks whenever i bend it D:
Saaaaaaaame
When I die I’m donating my body to science so I’ll have a chance of Jonathan rearranging my guts
Bruh xd
next level simping
Very useful simping
Jonathan embalm me please!! 🥰🥰🥰
@@schentler ya not wrong ,it's simping BUT FOR SCIENCE
funny that even though i have literally zero knowledge on anatomy, i'm still here. watching every video.
It's not zero anymore! Hurrah for this channel!
You never stop learning.
It’s like a 3D puzzle. Honestly dont need a medical degree when someone explains like he does ❤️🤟🏻
Thats what happens when someone is this passionate about what they do. You just want to keep watching
thats how you learn
I didn’t think about that until a friend dislocated hers. And then shortly after I damaged one of mine quite badly. And after that, I’ve been fascinated by the function of the Patella 👍🏻 Thanks a lot for this video 👌🏻
I've dislocated both of mine. Worst pain I have ever felt.
Your welcome 😗
...and you BETTER don't think at all !!!
@@invicta7546 Don't rupture the quad tendon, that's when you'll experience the worst pain ever.
oh god why didn't I think that was a thing that could happen
So at age 2-6 with all that falling and tripping, the body thought “okay no no. More leverage more power” - then decided to create a knee cap
🧠👏🏼👏🏼
Holy crap, the bone increases the quad's moment arm. I never would've considered that! That's super cool.
...like an auto mechanic's breaker bar
Happy dance!
After watching this I'm still convinced that the only reason we have kneecaps is so that someone can threaten to break them.
Yeah! That's real street wisdom!
Share any more info an my boy Jose will break your caps
i used to be an adventurer just like you, until i got an arrow in my knee
I love how he told us to send signals to our nerves to interact with the subscribe button and hit it lmao I loved that... first time hearing someone saying that on the outro in TH-cam
i thought that was adorable !
I'm a civil engineering student but somehow I love watching these videos and really just understanding how our bodies work.
Please never stop teaching us. Most of us are online, but this is the only digital learning I want to experience.. Keep it up!
I wish you would have shown a torn meniscus or an intact one and I wish you would have talked about what happens when your knees are grinding and popping
The grinding is likely to be arthritic crepitus as was show earlier in this vid. The torn meniscus is usually medial or lateral tearing or separating of the 'cup' or 'crescent' of a ball joint.
Keep squatting and it will go away. I used to have it pop and grind just from getting up bodyweight. Now squatting 300+ has no problem. Keep squatting and it will fix itself. Just give lots of time to recover at first.
Yeah when it locks up it really hurts, especially when you are running.
@@Opalivian honestly? My needs legitimately sound like rice crispies and I was beginning to accept that it was for good.
@@Greendayistheshiz Depending on your age it probably is for good. It might strengthen the quads but will wear out the patella that much faster. Talk to an orthopaedic guy or a qualified physio.
6 weeks post-op from a patellar tendon rupture repair. I've been seeking and learning so much about knee anatomy and just want to say thanks to you and your cadavers for this video.
Thank you! And good luck with the recovery!
How do I, an electronics engineering student, end up here and actually enjoy watching this. The whiteboard portions resemble my physics lectures a lot. It is like a machine in my body. Fascinating. TH-cam algorithm is strong today.
I study languages and still religiously watch their videos. It's lovely watching professionals sharing what they're passionate about 😊
I'm not going into the med field but I have found your videos so easy to understand.. my daughter is a clinical exercise physiologist and Ive sent these to her to watch so we can discuss... thank you so much!
I had a ruptured quad tendon 4 years ago, and I can say it was comfortably the worst injury to recover from I’ve had. Understanding how it all works is of particular interest to me, and this video has been excellent.
Love the passion you have for education about human anatomy. Keep up the good work!
I ruptured my four years ago as well. Then, just weeks after I was released from physical therapy, I broke part of the knee cap where the one of the suture holes was drilled. I didn't know I'd broken it, just thought I'd wrenched my knee. When it didn't get any better after two months, that's when I went back to the doctor.
@@DK-ed7be I had a scare when a follow up scan was reported with an 11mm gap in the tendon (which would have meant a failed repair), when it should have said 1mm which was expected at that stage…. Sorry to hear you did it tougher than I did, it was hard enough.
I watched this video just before going to bed and wow it took me 50 plus years to learn something new and what a joy it was , thank you.
You people come up with all relevant topics, I absolutely love all your videos. keep enlightening us.
A teacher also needs a teacher.. And glad I consider you mine ☺☺.. 😍 ur awesome
So basically it helps the quad muscle provide greater torque for the motion of moving the lower leg.
That's cool.
The thing this channel helps me with the most, is remembering that the human body is just a soft, squishy machine. That's easy to forget, but important to remember.
I would love a video that goes into how exercise can help support the knee joint and help relieve pain. There have been times over the winter where my knees have been extremely painful to the point I thought I needed a knee replacement.. but then as I did more walking and exercise it got better and better. Then when I could get back on the bike, the pain was gone... Explaining how muscles support this joint would be awesome.
Look up knees over toes guy
Excellent video! Any chance you could do a series on knee, hip, or shoulder replacements? Thanks and keep up the great work!
Dude, you're so much more dynamic than all the college professors I've had way back when. You made it interesting and your enthusiasm is contagious. Well done!
That's because he did multiple takes, had some basic script, editing, pro lighting, multiple camera angles, and so on. Professors are all live, recalling information, non editing
My entire left knee and part of the distal femur was removed and replaced with a titanium prosthesis. My kneecap is literally "buttoned down" to the intercondylar groove with a short silicone strap. It moves like normal, but the pain is intense due to scar tissue and other factors. Watching this video helps tremendously with understanding how my prosthetic knee interacts with the tendons and muscles.
Sorry to hear about your pain!
just wanted to share my appreciation for your videos! i am very grateful for the information you share and you endless effort to provide! i have been looking at my body so much differently and it has had a massively positive impact on my eating habits and how i take care/nourish my body! I have learnt so much more with you than I have ever learnt throughout secondary school, so thank you so much from the bottom of my heart! plus, you both are just amazing personalities and I'm very grateful to have found you! in watching your videos, i have had such a deeper appreciation for my body and I have been teaching my siblings what I have learnt in the hopes that it too makes them appreciate and nourish their bodies more! thank you again! you are doing such a great job, the both of you! lots of love and gratitude from the UK!
These videos help me so much with my sports rehabilitation degree, and understanding the body. Puts all the words from the text book into visual perspective which is priceless, Thankyou!
That was a superb, clear explanation. I can't believe I never knew this before. In particular I love that Jonathan uses the technical words but immediately explains them. I am watching this because I have a knee issue, but I feel I would love to spent time working my way round the whole body with this level of excellent instruction.
I haven't come across a more in-depth, physical perception of anatomy. Thank you so much for doing TH-cam videos!!
I love how you explain everything ! So detailed and so helpful for me as an SPTA!
Right, If you could take someone for your state boards…HE would be top choice!
Thank you, Jonathan, working with dead bodies is a taboo subject but you make learning about the workings of the human body so much easier to understand.
I was having an argument about knees and what else is uploaded today than this video? What stellar timing.
Thank you Jonathan for sharing all the knowledge that you share!👍
How cute are you? If every teacher had the passion and knowledge as you, we would have a super smart and educated population despite ourselves. I love how you use all the proper terms and then go plain English with examples. Thank you for sharing and never talking down to us wannabe geeks!! 👍🧐😍😁🥰🥰🥰🥰🥰🥰🥰🥰
ikr lol
Found the simps
Right, He talks to us like his medical students…..I think anyhow!
OnlyMed 😳😳😳😳
I'm a biology student, and I love to watch your videos.
And the way u both teaches is superb.
I love human anatomy, basically I watch your every videos 😅
Ostrich approves
Dude dont use big words like superb it makes me feel low class
Thank you. I have severe chronic patella femoral syndrome and walk with a cane. I've had 2 surgeries on my knee to help made the cap slide properly. I never truly understood my disorder until today. Thank you so much!
As always, gained a great deal of knowledge. Thank you !
Fantastic! I love a piece of heavy construction equipment called a crawler crane. If you look at the larger models (Liebherr 13500 comes to mind)with a two section boom you will see small jibs on each boom right at the hinge point. The cables for lifting the boom go over these in the exact same manner to gain leverage. How cool.
So cool! Due to a knee injury many years ago, I had arthritis & very little cartilage on my knee cap & femur. At one point, I was so desperate & asked my orthopedic surgeon why I couldn’t just have my patella removed. I have to say that you gave a much more clear explanation why it’s beneficial to keep your knee cap! I never thought about the leverage function, but it makes complete sense! Thankfully, I was able to receive cartilage & bone grafts to my patella & femur from a generous tissue donor ❤️ (it literally changed my life!). Thanks for explaining this concept so well.
Thanks! Now I understand why my knee function improved so much from cycling and building my quads.
I really enjoy your videos. More doctors need to know how to explain things to their patients in simple language. It would go a long way toward patients making informed decisions about their health.
This is great, my knees have been giving me a little trouble lately and it's nice to see how everything works under the hood. Thanks!
Where is your pain, I was a gymnast for 23 years and I have coached for the past 18 years. I get alot of kids with knee issues and have become good at guessing what is wrong.
Eat cherries everyday, thank me later! Trust me my knees are terrible when I don't eat cherries
I fractured my patella, its a very sore thing and a very tough experience 😢 thanks for educating us, fantastic service you provide 🙏
I’m a medical student and your videos really help me to understand some topics because you connect it medical topics to some thing that happening in the daily life
It's just fun to watch how enthusiastic you're about all this stuff! ^^
I just love this channel!
Thanks from Brazil BTW 👍👋👋
Me too
I love you guys! I learn so much by watching your videos and it helps with my medical coding!
That's actually mind blowing.
Finally understood how my knee really work.
Truly awesome, science is awesome.
That's "knee-t". Get it, knee-t?
I have a really odd question here: Why don't we have "elbow caps" is it because we don't have as much force to use that joint?
Thank you for this awesome channel!
I'd guess that elbow caps would be to complex, because our forearms are comprised of two bones instead of one. Also, like you said, our triceps isn't as important as our quads.
Edit: We have two bones in our legs too, I'm dumb.
A quick google search later, I wan't to add something. We have something that acts as a pivot joint in our ulna (one of the two bones that make up our forearm) called the olecranon. This is the pointy part of our elbow. So instead of having a floating structure like the kneecap, our elbow complex has an attached portion.
@@moreglutesmoredudes9974 well we have 2 bones in our lower leg too. The Fibula as well as the Tibia
@@Jizzlewobbwtfcus attached proportion.
@@Jizzlewobbwtfcus the fibula doesn't take part of the knee
This is such a great video I’m now looking at my knees in a new light
Wow 30 percent, I praise you because in an awe-inspiring way I am wonderfully made. Yours works are wonderful I know this very well. Psalms 139:14. Thanks.
I love your shows. Thank you!!!
Glad you like them!
I had a bad fall a few years back landing straight on my knee. The swelling pushed my knee cap up an inch until a physio team moved it back a year later…watching this made me feel queasy but the tendons give me issues so seeing how encased the kneecap itself is in the tendons and seeing the cartilage behind it was really fascinating! Definitely helping me to understand more about the problems I still have
LOVE watching your videos. Adds MORE cool insight what I've learn in nursing. Thanks.😊
Very interesting. I’ve had 2 total knee replacement surgeries. During this surgery the patella is shaved or flattened and a prosthetic is glued to the under side. Since I’ve had the surgeries my stability is back to about 99.90% . For over 31 years both knees grew increasingly painful and unstable. I know that med students learn from cadavers and without their help hunchbacks would still be digging up corpses for new doctors.
Are you able to run or bike with knee replacement?
@@originaldelta no you can't do any running after a knee replacement. But you can bike. Running puts to much stress on the replacement. Is what I was told.
I also ask myself everyday why I have a kneecap. Thanks
It's a very perplexing subject.
I found this video after recently spraining my mcl while skiing. Ha, had no idea what that even was! This video is so informative!
I watched every single video and this is the only one where I actually played with my kneecap, pushing it around bending my leg, feeling tendons, etc. I kid you not, I've learned more from TH-cam than I have in school, right through my time at university.
Should totally do a video on why and how the knees pop when bending.
Typically thats because of dehydration
This is extremely interesting! I love your videos! Can you explain what arthritis does to the knee? My knees have sort of broken up into pieces of cartilage or bone that can be felt and are moveable. When I had it checked maybe 15 years ago they said the pieces were too big to lock up my knees but suggested knee replacements. I am still walking without those surgeries. I have lost a ton of weight which helped and now am working out my legs daily and notice I walk better and better. This sort of explains why as the muscles are getting stronger. I would be interested to know the mechanics of how arthritis breaks up that Cartlidge or whatever and what a knee replacement is?
Dude, I can watch these videos all day. The information and how easy he puts it, is insane. I love it. And yes I 100% was feeling my knee during this one haha.
Anyone ever told they have “floating knee cap” I wonder what info Jonathan would have about that if it’s even real lol
Great presentation, Jonathan. Thank you!
When I watch these videos I always think our creator is a genius!
Amen!
I recently broke my ankle which I had surgery and plate and screws 😬 on both sides...I would love to see a video on fixation of bones...thank you 😊
Ow! I know how it feels. I broke my ankle, too--2 screws and a plate. I also snapped the tendon that wraps the ankle. It's been 40 years since the break and no problems. Hope you do as well as I did.
Loved this video, love this channel! Had 2 knee traumas. One on the left knee, when I was carrying something heavy and spun around too quickly the left kneecap went over to the outside of my leg. I straightened it out myself wrapped it, never went to the doctor. Bad idea! The 2nd time was an automobile accident, head on collision. It was my right kneecap that broke into 3 pieces. It was wired and pinned together again.
This is so interesting! I had a knee surgery, on my right knee when I was 15, where the doctor moved where my tendon attaches to my tibia. They moved it towards the medial side about a half inch. I did notice 20 years later that my right quads are not as strong as my left, whereas before the surgery my right quads were stronger. That was the only aspect of my leg strength that changed after the surgery and years of recovery. My right leg in general is still stronger and more coordinated than my left, it is just the quadriceps extension that seems to have changed. This lesson makes so much sense. The doctor changed my leg lever!
Could you Guys do a video about the spinal cord? I was wondering if it wasnt possible to remove the bones that surround it and replace them with mechanical equivalents or something like that
Before I watch the video to see if I recall my biomechanics classes: It increases the leverage in the leg.
Edit: Yes! I still remember! I had an awesome teacher btw. I didn't understand initially how the forces were applied. He taught me in a very similar manner as you did, only he did it with numbers because biomechanics, we used Nm to measure applied forces. Yes, trigonometry in a medical career so don't think you can escape math :)
I keep learning so much from you guys.
The quality of this video is so satisfying
The kneecap's function is clearly just to cause agony when it slips out of place. It serves no other purpose. Or at least mine doesn't.
the only thing my kneecap has done for me is break my femur
@@misseselise3864 ouch!! Mine just likes to slide out of its little groove every now and again which is painful and has meant I've developed arthritis in my knee. An orthopaedic consultant told me I'd likely need a knee replacement by the time I'm 40 so yay anatomy!!
I think it just a case of you only miss it when it's gone.
Its body armor when kneeling down and such.
@@Opalivian If you are all skin and bone like me, and 66 yrs,
it hurts like hell to kneel on anything, hard or soft.
I wish this had been around when I was a youngster.
Can you explain the effects of arthritis on joints as well please. Love your videos. Never stop learning.
It’s humbling to see this. Back in May I not only dislocated my patella but also damaged the tendons (I tore them if I remember correctly) to the extent that I’m learning how to gain control of my left leg again. Learning how to walk, how to kick, and squat just to name a few. Riding a bike had been the scariest exercise in my rehabilitation class but I’m thankful to this content and to the content creator and to the cadaver. I’m learning and I have a new appreciation for my body.
How many of you were feeling your kneecap and bending your knee while watching this?
Thanks Jonathan! As someone with OA and have dislocated my knee many times I found this very interesting. 😁
And who was born with no cartilage in my knees or many other joints.
Great channel and very informative! It's great to challenge the taboo of the cadaver and show people how educational anatomy can be with these generous donors. There is nothing creepy or gross about these! Also, adding some fun and humor makes it even more interesting
Thankyou soo much for putting your efforts in amazing educational videos. Lots of love from India 🙏🏼🙏🏼🌻🌻
Anyone else was fiddle with their kneecap through the video?😂
"Why do you have a knee cap, I'm sure that's a question you ask urself every single day"
Me who has never once asked about it in my life
Lol. Your comment made me laugh. I guess I do ask myself once in a while
Brilliant video. Your example of the wrench movement was excellent. Our bodies are really quite well designed 😂 Thank you Johnathan.
You are really good teacher thank you teaching us stuff I didn't even think I knew I wanted to know .
Fascinating video but I probably shouldn't have watched it while eating a cheese omelet
😂
When i move my knees slowly and listen closely then they sound creaky like old door hinges, it doesn't hurt or anything. Why is that?
@@DetectiveLorenzo I see
When i clicked on this video and watched the video i couldn't help but look at my knees and imagine how they work really amazing!
You do a fantastic job on this channel I love it!!!!
That’s interesting the part about sesamoid bones - i learnt to process and articulate animal skeletons and would often find tiny little extra bones inside tendons around the feet and ankles (smaller mammals/rodents particularly) and always wondered what they were and why they were there. Thank you!
"nice kneecaps you got there..."
I am 62 and getting a little gyp with my right knee so I'll look forward to seeing the video
I am not a medical student nor anything in the branch of healthcare, but I am fascinated by your videos, they’re amazing 👍🏼
My knee caps move right over to the sides (outer side), very far, whenever I bend my knees, rather than just moving down. Wonder if it is some slight difference in position or something. I also have loud popping every time I bend them or straighten them out though too, and knee pain forever.
Go get them checked out with your doc, displaced patella can actually be rectified with a few weeks of physiotherapy or surgery if your problem is a bit more serious. Then you can move without pain-such a relief! My right one was displaced by doing a long jump into improperly prepared sand (wet and not raked throughly enough) so it was like jumping onto hard concrete. Limped around for a few days then it seemed to have healed-before breaking again a few years later and requiring surgery.
Have you been checked for a hyper-mobility disorder? Being too bendy can cause knee pain, among other things
@@limlianhui9462 They are not dislocated, they just track to the outside when bent, like 45 degrees. I also have RA, but this isn't caused by RA.
@@mutantmaster1 Yes, If anything I have the opposite of hyper mobility, I have poor joint mobility due to RA.
Im sitting on the couch and I keep grabbing and poking my leg/knee and my parents are looking at me like im crazy. Explaining that a dude is showing me how my knee works on a dead body probably wouldnt help my case.
AmAAAAZING break down! Great job on this vid guys! Would have never guessed it was for mechanical advantage!?!?! 🙉
Your channel is a godsend for art studies
Me doing a first year Anatomy: HMmMmm....yes. Bone muscle move hehe
I might not pass the subj :"(
Don’t be so hard on yourself. You can achieve anything in life if you work hard and if you believe in yourself
Please mention how you can smash the shit out of someone with a knee
institute of human anatomy special: how to make your kneecap actually useful
@@misseselise3864 if this channel includes factual stuff that relates to combat sports, this channel will skyrocket lmao
Loved the white board explanation of how the patella increases efficiency of the quadriceps muscles 🔥🥸
Super interesting! How much we take to ease off the everyday life from nature is amazing.
This is one of the only videos I’ve ever cringed at when they pulled the skin back, the kneecap looks disgusting lol
Me too, I'm suprised there isn't more comments about it, this video makes me want to jump out of my skin, and there isn't even anything wrong with my knee so far
@@SuperExibo Ikr! It’s nasty!