Additionally, each finger represents a planet and element.
The Universe is composed of five elements, earth, air, water, fire, and ether. Similarly our body is also a union of five elements which is represented by our five fingers.
Hand mudras regulate these five elements in our body.
There are hundreds of mudras, or hand positions, used in the practice of yoga and meditation, and Kundalini Yoga uses many of them.
Mudras are very powerful. I like to think of them as Kundalini gang signs!