Motor dysfunction is when a part of your body doesn't work the way it's supposed to. This can happen because your brain is not sending the right signals to your muscles or because your muscles are not strong enough to do what they're supposed to do.
For example, imagine trying to write your name with a pencil, but your hand won't hold the pencil properly or move in the right way. This can happen if the signals from your brain to your hand muscles are not working properly.
Motor dysfunction can also affect other parts of your body such as your legs or your eyes. It can make it hard to walk or balance, or it can cause your eyes to move in the wrong direction.
There can be many reasons why someone might have motor dysfunction. For example, it can be caused by a brain injury, a genetic condition, or a disease like Parkinson's. Doctors can help diagnose and treat motor dysfunction through things like physical therapy, medication, and surgery.