Good fine motor control needs to have a good base to work from. It is very difficult to use the muscles of the hand when the body, shoulder, and arm that the hand is attached to are moving around or having trouble maintaining their position.
A good trunk and shoulder strengthening program can positively affect fine motor control. Prone activities, crawling, and weight bearing on the arms in to the shoulders are all important for fine motor development.
Some good trunk and upper extremity strengthening activities are: