Ankle & Subtalar Joint Motion Function Explained Biomechanic of the Foot - Pronation & Supination

[ThePesDoc]

I must have read my biomechanics notes ten times, but it didn't click completely until I saw this visual illustration with explanations. Thank YOU!!!

[DavetheMD]

Excellent animations and detail. Thank you very much. Also, if people can't keep up with your speaking, they can always use the pause button. :D

[DrGlassDPM]

@DavetheMD Thanks Dave! I'm glad it to hear it. :-)

[DrGlassDPM]

A full transcript is on the website. The data is published in Valmasseys lower extremity biomechanics.

[jemai852]

can i have the written explanation??

[MrGsteyr]

Great video but the audio has a choppy quality to it and is spoken way too fast.

[DrGlassDPM]

@MrGsteyr I'm sorry about the audio quality. This is something I've been working to improve with future projects

[Jimplusyou]

my ankle hurts :[

[Adomiso]

well i don't understand single thing she said but i watch this because my ankle was having some kind of pain which i never had before. trying to fix my ankle through this video

ps my ankle broke before 2 years ago. and still will sprain sometime when i do training

[DrGlassDPM]

@Adomiso You may benefit from strengthening and physical therapy.  An ankle, after a break, is not likely to be 100% thereafter

[bex271]

*scratches big stupid head*

[pooln80]

its just awesome.......................

[DrGlassDPM]

@pooln80 thanks!

[Silverpatrone15]

you gotta sloowwwwwww downnnnnnnnn

[DrGlassDPM]

@Silverpatrone15 Sorry :-(

[colombianaliza]

Great job! :)

[DrGlassDPM]

@colombianaliza Thanks!

[TheReader19]

Dr Glass, I do enjoy your videos, however you do speak quite fast which makes it a little difficult to keep up with you. However video's are very educational and informative. Thank you

[DrGlassDPM]

@Inconvenience42 Sorry about that. I'm making effort to improve that with future problems

[janehcro]

I'm just listening to music watching this on mute. excellent 3d animation.

[DrGlassDPM]

@janehcro Thank you. I'm hoping to have some more Biomechanics before long.

[TheVishu27]

Absolutely nailed it!!!!

[DrGlassDPM]

@TheVishu27 I'm glad you liked it. :-)

[harshanand1]

good one

[DrGlassDPM]

@harshanand1 Thanks!

[ing13920]

great , but may you please describe what it says for me, I need to know but I am an foreigner and i cann't catch up.

[DrGlassDPM]

@ing13920 The transcript for the video is over at the DrGlass(dot)org page associated with that video. It has all the narration available. Thanks!

[CDMI2010]

Nice illustration... :-)

[DrGlassDPM]

@CDMI2010 Thanks!

[Cassandracarl]

Big words....

[DrGlassDPM]

@KnivesnForks Sorry, bud :-/

[yanny419]

Very nice video. Would possibly be helpful to have arrows pointing to the particular bones and joints you're talking about for someone who is previously unfamiliar with these terms?

[DrGlassDPM]

@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

[speedchain111]

What program are you using to create these wonderful animations?

[DrGlassDPM]

@speedchain111 The software used for these videos is Lightwave 3D by NewTek. It is an all-in-one package, which I love

[WrinkleTimeFilms]

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.

[DrGlassDPM]

@WrinkleTimeFilms My appologies

[typeclash]

I donno what to do with this information

[alo0o0sh1]

this is wonderful ,i'm a student in a faculty of rehabilitation sciences and i've an exam after 2 days so it's so helpful to understand the complex of biomechanic Specially (ankle)

[DrGlassDPM]

@alo0o0sh1 I'm glad you enjoyed it. I hope the exam went well!

[mongolelf]

@alo0o0sh1

Concise, extemely useful explanation of ankle mech. I had the impression tho, that the animation did not reflect the explanations for sub-taler mechanics...

[kcampbell10408]

This was a great video; I am going to have surgery to fuse my my subtalar joint so this helps me understand what motions I will have left after the surgery.

[DrGlassDPM]

@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.

[catharsis68]

really good animations! very helpful for a PT student. The speech was delivered too quickly though. 

[DrGlassDPM]

@catharsis68 My apologies for the speed of narration. I hope to do a better job with future videos.

[barrymasteller]

you talk tooooo fast

[DrGlassDPM]

@barrymasteller sorry about that

[plokoon761]

@barrymasteller its just that you are so bright, know so much, to miss the information is a bit of a let down, would like to see more, just slooower

[tooxtreme55]

seriously, why is she talking so fast.....this is one of the most complex and confusing joint topics and dr. glass is running through like she wanted to get the video over with as fast as possible. Can't learn too much from this

[amycandysi]

talking too fast...brain cant catch up DX

[DrGlassDPM]

@amycandysi sorry

[sickofdao]

why is subtalar inversion eversion in the longitudinal axis?

[DrGlassDPM]

@sickofdao motion of inversion and eversion is in the frontal/coronal plane. This plane is perpendicular to the longitudinal axis of the foot.

[kenganma]

subtitles in espanish please :)

[DrGlassDPM]

@kenganma I would love to get that underway...

[DrGlassDPM]

@DrGlassDPM Motion about an axis is perpendicular to the plane itself.

[DrGlassDPM]

@kenganma I hope to get a translation made one day. I agree that it is important

[martianrocket]

Thank you Dr Glass for your effort to illustrate this complex part of the human anatomy.

[asimazizwaqas]

Intelligent design!!

[ruksih]

loved this - thought that the speaking was a little too fast though... brilliant graphics :)

[DrGlassDPM]

@ruksih Thanks.  We'll work to improve the voice mastering in future videos. Glad you enjoyed it

[396M]

@ruksih tell me about it, she talks like a Vally Girl - Like-OhMiGawd, Talotubularrrr

[jilabichamcham]

The talus looks like a camel hump steeping down! It looks as a man with one long leg ( fibula) and one short leg ( tibia) sitting on the camel hump and HEZ RIDING THE CAMEL..haha

[jilabichamcham]

The talus looks like a camel hump steeping down!

[giotto2]

Beautiful lesson, thank you.

[DrGlassDPM]

@giotto2 Thank you!

[luv2bac]

Dr. Glass, this is great stuff! Thank you so much for posting. It is an amazing teaching tool with the visuals.

[DrGlassDPM]

@luv2bac I'm really glad you enjoyed it.

Hope it helps

[H00dedChildren]

SPEAK ENGLISH!!!!!!!!!!!!!!!!!!!!!!!­

[DrGlassDPM]

@miketysonjunior That's actually my fault. I was fairly new to audio editing back when this video was in production.  Hopefully I've gotten a little better since then.

Sorry about that

[scavenski]

this is sooooooo complicated

[DrGlassDPM]

@scavenski It's a lot to take in. Biomechanics is arguably the most complex subject in Podiatric Medical school.

[LMTCPT]

Very informative; I've developed an interest in the ankle after I fractured it 5 months ago

[DrGlassDPM]

@LMTCPT You should check out one of our recent ankle fracture videos we posted. (as long as it doesn't bring back any painful memories)

Hope you are recovering well!

[eyesandy1]

I have had two total ankle replacements, (In-Bone devices), I'm one of only three in the USA with the present devices and the only with a non-fda approved long-stem talar, 9 came ito the US last April and I received the piece under a compashionate care plea, good vid. explaining the anatomy of the ankle. If anyone seeing this needs more information on replacment please feel free to contact me

[MrMetalheadtildeath]

@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

[DrGlassDPM]

@eyesandy1 I'll pass the message along, likewise. Thanks

[querida1314]

this video is simply awesome!!!! very very helpful! =)

[DrGlassDPM]

@querida1314 I'm glad you enjoyed it. -Nick

[supermegachoice]

Work with pro athletes and really enjoyed this, The visuals were aweome . Love to see if functional MRI agrees with what the women is saying..

[cr0uchingtiger]

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.

[DrGlassDPM]

@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.

[rjhymelife]

I LIKE IT!

[DrGlassDPM]

@rjhymelife Sweet!

Glad you liked it

[superesonator]

Excellent. I learned a lot from this.

[DrGlassDPM]

@superesonator I'm glad to hear that!

[ChrisNiagara]

Great video...but your voice rhythm ....hmmmmm

[DrGlassDPM]

Yeah, we learned a LOT of lessons from this video. Namely the speed and pace of the narration. If you look at some of our recent videos, you'll notice we tried to improve this aspect.

Live and learn

[steaksauce112]

3:53 is cool

[samran007]

Excellent and very clear video, thank you very much.

I was wondering do you have any videos taking into account the role of tight gastroc-soleus group in pronation at midstance (i.e. escape pronation)?

[DrGlassDPM]

I'm glad you enjoyed this video. To answer your question, "Yes" we do have a video to illustrate this concept. It is our one titled "Midfoot Compensation"

It shows how an Equines Contracture or Tight Heel Cord can eventually lead to a breakdown at the midtarsal joint (Chopart) as well as a compensatory Eversion/Pronation at the subtalar joint

[devmotwani1]

Thank you so much for sharing this video.I am student of 1st year MBBS & i gain more knowledge from this animation..

[DrGlassDPM]

I'm glad you enjoyed this video. We hope it will be useful to you in your career.

[badger10587]

Excellent animation... I too am a physical therapy student, and flat pictures from a kinesiology book simply don't compare to a 3D view. Thanks for sharing!

[DrGlassDPM]

We hope to be making some more Orthopedic related videos in the future. 3D is a great way to tell the story, indeed.

Thanks!

[m4carbine77vid]

whew!!!! thats cool!!! a clear and vivid representation of the ankle movement in different planes and chain of motion. thanks doc!

[DrGlassDPM]

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.

[ryguy985]

Thanks, I'm a Physical therapy student and this is helpful in understanding the complexities of ankle motion.

[littlehappymonks]

excellent, thanks a lot

[dreyvin1]

very informational I just had calcanus reconstuctive surgery thanks

[warmaster900]

great video for illustrating the bone movements but i'm pretty sure the angles for the STJ (subtalar joint)are wrong....

checking the pod workbook it's supposed to be 42 degrees from the transverse plane and 16 degrees from the sagittal plane, hence 84 degrees from the frontal plane

which makes more sense since if it's 16 degrees from sagittal and 42 from frontal and they are in the same 90 degree quadrant then the two angles should add up to 90 degrees not 68 degrees

lemme know if i'm wrong ta

[ovedhashem]

literally, the stj is 42 from transverse and 48 from frontal which equals 90 degrees. though we really say that the two axles are 45 each. it's definately not near 84 degrees from frontal plane...- see valmassy textbook first two chapters...

[Cucelyum]

hey real thanks!!!

[marcvanderloo]

Pity it was narrated by a machine!

[kappy1979]

Hey "MarcVanderloo" I AM the "machine" that you were refering to. LOL Yes, I'm actually a person&I invite you to read our bios &see pictures. We did have to slow down the video in some parts for clarity. Sorry for the distortion. I hope it was to your liking. We will be sure to keep you &your comments in mind when we record our next educational video. Thanks, Kelly

[kappy1979]

If you have any further insight...please check out our website for additional bios, clarification &...yup, our pictures (yes, human..not "machines!") We will keep your advice in mind going forward, Mark. Otherwise, I do hope your experience &viewing time proved useful. -Kelly

[marcvanderloo]

I suppose I was being flippant, but I could hear audio joints that were too brief and made the soundtrack jump. The video itself was good.

[DrGlassDPM]

I can understand. What we do is record the audio and then go back through it and take out the areas of "dead space" in order to condense.

The reason is that our videos are rendered at 30 frames per second, and each frame can take upwards of 4 minutes to render. Do the math, and you'll see that a 7 minutes worth of audio are a lot easier to do than 9 or 10.

We might have got a little over zealous with it this time, but our most recent two videos were edited a little better in my opinion.

[mobitz57]

Very nice! Thanks.

[Therealzerocool]

Gracias por el video ¡

Thanks for the video, its very helpfull.

[nerfnerf77]

very helpful!