Are you talking about striking with the joint? That's a bad idea. It's definitely not how you would strike in Muay Thai and I doubt it's proper in Karate either. You should strike with the lower part of the shin, but maybe you saw that and it looked like it was with the joint?
It's not a karate kick
We use the ball of the foot, the tips of the toes and the knee
Neither.
Ka-rate.
Sounds like a good way to bust your ankle and I doubt either style would encourage that.
i think karate. muay thai would prefer to hit using their shin
if you kick using the curved area of the ankle that is between the foot and shin
