Ankle & Subtalar Joint Motion Function Explained Biomechanic of the Foot - Pronation & Supination
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- เผยแพร่เมื่อ 20 ม.ค. 2008
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Dr. Glass DPM Podiatry Resource Network
glass.dpm@gmail.com
www.drglass.org
This video illustration depicts the ankle joint complex which includes the tibial talar and subtalar joint in human anatomy.
Dr. Glass DPM - This is an illustration that depicts the cardinal plane movements of the lower extremity. This is a biomechanical demonstration of the functional orthopedic nature of podiatry
Thank you Dr Glass for your effort to illustrate this complex part of the human anatomy.
Excellent presentation! Our anatomie is simply amazing.
Really got a lot from this. I am Podiatry student so this was spot on. Speed I found ideal - I generally have to speed videos up as they drive me crazy playing slow
These videos have been helpful during some of my teaching in our Orthopedic Residency program for physical therapy students and residents!
I know this is an old video and my use of it has nothing to do with the intent, but I just wanted to comment and say I appreciate the hell out of this video. I've been working on a 3d character for a comic I want to make, and I'm going into WAY too much detail with it(fully rigging all of the bones, muscles, and fat. Most of it will never be seen in the finished product, I just like knowing it's all there). I refuse to make all of the foot bones act as one static piece, but it's been hard to find reference that shows how the tarsals actually move in relation to each other, until this. This is GOLD.
Amazingly concise and well articulated explanation of ankle biomechanics! I like your fast rate of speech, it is helping me improve my fluency with ankle terminology. It complements my coursework beautifully.
this animation is incredibly useful! thank you!
For those complaining about the VIDEO SPEED.
On the lower right corner of the video screen, there is a settings button. click on it, then
select a slower speed.
Thank you Dr. Glass. Very helpful.
Thanks !!
Thanks. Learn something new every day.
Great video. Good speed of audio too, gets the information out quickly and clearly. Screw those plebs below that don't know how to use a pause button. I came to visually learn about how the bones function throughout movement and you gave me everything I needed. Thank you!!
th-cam.com/video/0j5foSUw12M/w-d-xo.html gait quadriceps
That was just incredible (with slower speed ha ha) with everything explained while getting the perfect visual in real time.. BRAVO and THANK YOU!!!
We hope to be making some more Orthopedic related videos in the future. 3D is a great way to tell the story, indeed.
Thanks!
Very informative animation and narration. One of the best I've ever watched.
th-cam.com/video/0j5foSUw12M/w-d-xo.html
Thanks for the upload 👍 !! I just had a retrograde ankle fusion 6 months ago !!
By far this the best video .congrats
AMAZING VIDEO AND EXPLANATION!
Great videos, great explanation, LOVE THIS, thanks for your time with these
th-cam.com/video/0j5foSUw12M/w-d-xo.html gait quadriceps
I actually didn't find it too fast and there's an option to slow down/speed up anyways. Speed was perfect for quick revision! Great video
This was perfect! I broke my ankle & was looking for understanding of ROM and why some ROM hurts and others don't. Thank you for this video!
th-cam.com/video/0j5foSUw12M/w-d-xo.html gait quadriceps
Thanks, I'm a Physical therapy student and this is helpful in understanding the complexities of ankle motion.
THANK YOU. learned more from this video than class!!
that was a very helpful demonstration, thank you!
th-cam.com/video/0j5foSUw12M/w-d-xo.html
Saw a Dr snap the subtalar joint on IG so now im convinced I should have been a bone doctor. This is pretty cool!
Excellent. I learned a lot from this.
Excellent video, though I echo the others who have said that the narration was too quick. I'm on my first leg (so to speak) of my PT training. I wish there was an overall resource like this for personal trainers in training. Thanks for posting this.
Sweet! I'm a PT student trying to get normal dorsiflexion back 3 mo after a fibular fracture. The limitation feels like there's more strain in the talofibular jt (anterior ankle) instead instead of in the achilles T.
great video. ill watch this every day until i understand
Dr. Glass, this is great stuff! Thank you so much for posting. It is an amazing teaching tool with the visuals.
th-cam.com/video/0j5foSUw12M/w-d-xo.html gait quadriceps
th-cam.com/video/0j5foSUw12M/w-d-xo.html gait quadriceps
Absolutely nailed it!!!!
Wonderful explanation. I've always found the ankle complex to be super confusing due to multiple joints/things happening at forefoot vs midfoot vs rearfoot. After watching this video, it is starting to make sense!!!
I am glad to you it does !! Xd
Play the video at x0.75 speed... she sounds a bit drunk but it's way more comprehensible and easier to follow than the actual speed
th-cam.com/video/0j5foSUw12M/w-d-xo.html
beautiful and amazing video..! great help..! thnk u
For subtalar joint:
OS: open chain supination
For OS remember IPAD i.e Inversion, plantarflexion, adduction
OP:open chain Pronation
For OP Remember EDAB i.e eversion, dorsiflexion, abduction
CS: closed chain supination
For CS remember IDAB i.e inversion, dorsiflexion, abduction
CP: closed chain Pronation
For CP remember EPAD i.e eversion ,plantarflexion, adduction.
Hope this helps if you get question from subtalar biomechanics in NPTE
very helpful
Ankle examination
Thanks a lot for this.
i know it's kinda off topic but do anybody know of a good place to stream newly released series online?
Do you have transcripts for any of your presentations? I think the speed is just fine for individual learners, who can pause, replay, etc. Having a transcript would help with the process, and for quick reference.
its just awesome.......................
great video your video quality is also good and explanation way too
Gracias por el video ¡
Thanks for the video, its very helpfull.
Thanks ryguy!. We're currently working on the joints in the forefoot. Stay tuned, because we hope to have the next orthopedics video out before long.
great detail! thanks!
Great vid...I have no degrees and was able to understand most of it..I did have to whip out the dictonary though...thx.
I can agree with your notion, to some extent. I feel it is a combination of intrinsic and extrinsic muscle strength to condition good, functional posture. Hip and core muscle strength are under appreciated in patients and care providers alike.
Great!! Thank you.
Intelligent design!!
this video is simply awesome!!!! very very helpful! =)
I wanted to understand movement of the foot better to apply to my walking but all I got was that calcaneous moves around a stationary talus during pronation and supination, which actually was very useful to me, but I want to apply that to walking.... I will rewatch it in a slower speed. I also recently learned of the transverse arch in the foot and have come to question how weight should be transferred over the toes along the tranzverse arch. In my walking the jointz of my pointer and middle finger fall down and touch the ground and it feels uncomfortable and it begs the question if my feet need strengthening along thay arch. Anyways thanks for the awesome video I didnt think I would find something this informative.
it took me a lot of time to understand what was being said but it was worth it:))) thankss
I honestly love the complexity of the foot
Not neccessarily, Alexander. The hips work in synergy with the muscles of the leg and feet to alter the posture and provide propulsive leverage during walking, etc. In fact, at closed chain ambulation, the calcaneus moves very, VERY, little.
Have you ever examined a live flouroscopy of the foot during a gait cycle?
@alo0o0sh1 I'm glad you enjoyed it. I hope the exam went well!
@speedchain111 The software used for these videos is Lightwave 3D by NewTek. It is an all-in-one package, which I love
@DavetheMD Thanks Dave! I'm glad it to hear it. :-)
Great job! :)
loved this - thought that the speaking was a little too fast though... brilliant graphics :)
Cool!! We are amazingly made!! :)
@kcampbell10408 Remember: the other joints in the foot will be able to take up the slack once the Subtalar is fused. Not all motion is lost.
Nice video. Is it practical possible for the subtalar axis to deviate 48 degrees from the frontal plane, at the same time as it deviates 16 degrees from the sagittal plane? The two planes in the video makes 90 degrees to each other. The explanation of the joint motion is perfect!
what do you think about eversion exercises for osteoarthritis of knee??are they helpful??
What program are you using to create these wonderful animations?
I absolutely agree!
One movement that is almost never talked about is the combination of plantar flexion and eversion. This motion is always used when turning while walking or running about.
excellent, thanks a lot
Have you considered publishing a controlled study on your findings? Indeed it would be nice to see how well it compares to medical literature.
I'm glad you enjoyed this video. We hope it will be useful to you in your career.
art. calcaneonavicularis is a stabilizing joint but the calcaneus moves a lot compared to the tibia, the calceneus moves together with other joints and is connected to a complex kinematic chain. it begins at art. talonavicularis and the cuneiforms where the movement is converted. the calcaneus has an important function in guiding forces from foot to the leg. that's why the calceneus does make little movements, it's stabilizing nature.
so, is Dorsi flexion in the Front plane? and axis? because I have a presentation to do and I'm slightly confused of what the plane is
@eyesandy1 i need replacements on both very soon.i am pretty scared.i have had two subtalar fusion surgeries and three hardware removal surgeries to take 4in screws out of both.how is your mobility and the pain afterwords.i am 41 and have been hurting since i was 13 from what i thought was cartilage tears,but,it turned out to be birth deformalities.let me know how it went,please. thanks
That sounds very impressive. It would be nice to have some references for specific points you may agree or disagree with. I value content which is peer reviewed. I know we can't post links in the comments field, so just list the Pubmed ID#
No, I suggest you review the wikipedia article for Pronation of the Foot. (/Pronation)
@janehcro Thank you. I'm hoping to have some more Biomechanics before long.
I agree a lot with what you are saying. I feel orthotics are able to help many biomechanical scenarios, however, there are some conditions in which they may provide minimal assistance at best. The forces through the hips and upper kinetic components is very powerful.
I would like to know which textbooks or published literature you reference for this discussion. My work is derived from Dr. Roots Biomechanics and Valmassy's Textbook.
well explained
Thank you
A full transcript is on the website. The data is published in Valmasseys lower extremity biomechanics.
good one
@kenganma I would love to get that underway...
@DrGlassDPM Motion about an axis is perpendicular to the plane itself.
Thank you for this video! Just please slow down for the next ones? Or have more pauses to let our brains absorb what you say. Information overload!
This vido is very useful and interesting, but the biomechanics reference URL is not availible. So could you share the reference material again?
@luv2bac I'm really glad you enjoyed it.
Hope it helps
really good animations! very helpful for a PT student. The speech was delivered too quickly though.
Posterior Tibial Pathology can have a wide range of presentations and severity. A subtalar fusion is not always the first line treatment for this condition, but when performed, will help to reduce the valgus strain on the rearfoot. It may be done in conjunction with a tendon transfer, augmentation or Talo-navicular joint fusion.
thank u for amazing vidio
Nice illustration... :-)
Hello DrGlass! Thanks for the very informative video. Your website contains some amazing videos and images; are they free to use non-commercially, say for presentations? I am a researcher in the field of prosthesis design and simulation. It'd be helpful if you can let me know which tool/software you used to create this video. Thanks again :)
@superesonator I'm glad to hear that!
th-cam.com/video/0j5foSUw12M/w-d-xo.html gait quadriceps
@yanny419 Absolutely. I think that would have been a better way to show things. In the later videos for the Lauge Hansen series, I used arrows and visuals a bit more intuitively
@5'42'' you say that supination is caused by the calceneus. It is not a cause but a result of endorotation in the hip which causes the knee to rotate inwards with shear on the meniscii and endorotation in the lower leg, the calceneus is forced to go inward and causes the foot to pronate. Also the first toe is predisponed to get in bad 'valgus' position.
@querida1314 I'm glad you enjoyed it. -Nick
@cr0uchingtiger This and the cardinal anatomical planes are all we've done. It would be nice to make more of these, but the "DrGlass video podcast is focused on the lower extremity, primarily.
I can't post a direct link in response (youtube rules), but I can reccomend you watch the Subtalar axis locator video by Kevin Kirby. It demonstrates this motion very well, from multiple angles.
Would a Subtalar Arthroresis help or worsen Posterior Tibial Tendon Tendonitis in someone who is Flat Footed. ?
@kenganma I hope to get a translation made one day. I agree that it is important
@sickofdao motion of inversion and eversion is in the frontal/coronal plane. This plane is perpendicular to the longitudinal axis of the foot.
@rjhymelife Sweet!
Glad you liked it
@Adomiso You may benefit from strengthening and physical therapy. An ankle, after a break, is not likely to be 100% thereafter
great
@scavenski It's a lot to take in. Biomechanics is arguably the most complex subject in Podiatric Medical school.
@TheVishu27 I'm glad you liked it. :-)
Wow! At 0,75 x speed I actually understood some of the parts!
one of the best video youtube have ever seen. thank you!! ;-)
Can anyone tell me if this series is done on the whole body? I'd love a video series like this as I'm a personal trainer.