Keep A Steady Head 3/26/1999 - By George Freeman
Keeping your head steady during your release will help your accuracy by allowing you to keep your eyes on your target when the ball comes off your hand. If your head is jerking side to side while you release, there is no way you can keep your eyes on the target, thus lowering your accuracy, and leading to shots that are off target.
If your shot is off-target you'll have a hard time knowing when and IF to adjust to lane conditions. Keep your shoulders aligned with your target, and your head will follow since it is attached to your shoulders.