joint involved: Fingers

Exercise 10: Try to form a letter "O" with each finger and thumb.
a) touch the tip of the thumb to the tip of the index finger, then
b) Spread your finger as wide as possible. proceed on to touch the tip of the thumb to the tips of your other fingers, spreading the fingers wide after each attempt. if you cannot quite bring the thumb to touch the finger, use the other hand to help to bring them together gently.