Mudras create a subtle connection with the instinctual patterns in the brain and influence the unconscious reflexes in these areas. The internal energy is, in turn, balanced and redirected, affecting change in the sensory organs, glands, veins and tendons. According to Ayurveda, diseases are caused due to an imbalance in the body, which in turn is caused by lack or excess of any of the five elements. Our fingers have the characteristics of these elements and each of these five elements serves a specific and important function within the body. The fingers are essentially electrical circuits. The use of mudras adjusts the flow of energy - affecting the balance of air, fire, water, earth, ether - and facilitate healing.
Yoga mudras are practiced sitting simply cross-legged, in Vajrasana or in the lotus posture, or even by sitting comfortably on a chair. Ideally, breathing is done when practicing most mudras.
The physical body is made up of five elements namely - Air, Water, Fire, Earth and Aakash (ether - the tiny intercellular spaces in the human body). Imbalance of these elements disrupts the immunity system and causes disease.
Deficiencies in any of these elements can be made up by connecting one part of the body with another in a particular manner through Mudras. When a finger representing an element is brought into contact with the thumb, that element is brought into balance. Therefore the disease caused by the imbalance is cured. Mudras start electromagnetic currents within the body which balance various constituting elements and restore health. The joining of fingers creates an effect on the human body.
some basic yoga mudras as an example are Chin mudra,Chinmaya Mudra,Adi Mudra,Brahma Mudra