ROM Resist & New Zealand

A signal is sent from the brain to a muscle. The brain has an intention of what this should do. Preceding this, it actually sends what the tension should be if it goes as it was hoped. With the spindles reset and the muscles signaled, the spindles should be happy :-) and thus have nothing to add. There is no reflex. Happy happy spindles.

But if the incoming setting does not match, the spindles are empowered to send signals to adjust muscles to match the intention. This mechanism is very fast, and, very patterned, and thus cat-like. In fact nature has cats giving the main signal only to the spindles which then elicit the main muscle action and adjust on the fly. Can't teach old dogs new tricks? Can't teach cats any tricks. They have more than enough of them (survival wise) built in, but you won't see any complex new stuff.