When I was 3 years old, a big piece of farm equipment fell over and landed on top of me, pulling several nerves. As a result, a handful of muscle groups have atrophied, one of them being the muscles that pull open the fingers on my right hand.
As a teenager, I built a splint that I wore at night which stretched out the hand and lengthened the muscles on the inside.
As an adult, I threw it out and over the last few years, I’ve noticed the muscles on the inside start to shorten again so I’m once again making a hand stretching splint.