Isometric little finger abduction (abductor digiti minimi)

Sit upright in a chair.
Place your affected arm on a table with your palm facing down and your fingers flat.
Place your index finger from your unaffected hand on the outside of your little finger.
Try to move your little finger away from your other fingers, using your opposite hand to resist the movement.
Keep your palm and forearm flat on the table throughout the exercise.