Addition to the joints movements of Ankle..

Hi, =)

After further reading about the ankle anatomy,
I found out that our ankle is not as simple
as we thought. It consists of 2 important
joints inside our ankle joint. "What is that?"
I know you are wondering.

Ok let me continue. Inside our ankle got this
two types of joints that each one supports
different types of movements which combines to
become the 3 movements that I've mentioned before.
I also think that there is only 1 joint inside
our ankle that support all the 3 movements.
But our ankle is not just a simple hinge. It's
way more than that. :)

So this the name of the joints. Introducing the
first joint, Talocrural joints. This joint is
the meeting point of the Tibia bone and the Talus
bone. This joint supports mainly the dorsiflexion
and plantarflexion. It also support a portion of
the total ankle rotation movements. In extreme
condition, such as the patients stumble or fall,
the Talocrural joint can also support a little
inversion and eversion movement.

The next joint is the Subtalar joint. This is the
meeting point of the Talus bone and the calcaneous
bone. This joint support mainly inversion and
eversion and also a portion of ankle rotation
movement.

Combination of these two joints will produce the
complex movements of ankle. In my project I will
focus on the Talocrural joint as that joint will
be the main problem area because of the arthritis.
As we can see that this joint still supports all
three movements in extreme condition. As a
designer, we need to think of the worst scenario
that can happen so that the implant that we design
will not fail and have as long as possible life
cycles.

As for our ankle rotation movement, it is shared
by the Talocrural and the Subtalar joints. I hope
this infomation can help you to understand about our
ankle and to realize that our ankle are so special
and we need to take a very good care of it. :)

So that's all for now, I will add to this blog in
the near future. Until then, have a nice day.


Regards,


Tim