In Blender there are bendy bones, but there used tobe another way to tell that the effect of a bone was tobe folowed over x bones higher up in the chain. I think it was a kind of inverse kinematic or so i am not sure either. I’m using 2.8 and am not sure where this could be.
The effect used to be that if you had a leg and you moved the feet, the other bones up in the chain (the aleg) moved as well. using a higher effect level of X (which counted over bones) even the torso could move in direction of the leg for a bit.
Not sure how it was called in 2.79, and where i did it back then but maybe this rings a bell to someone.