NAVARASAM (Facial Expressions)
A highly stylized technique in the invocation of bhava has been developed in Kathakali. This is called Rasaabhinaya. Indian dramatic theory explain 9 kinds of basic expressions(Navarasam)
MUDRAS (Hand Gestures)
The communication among the characters and to the audience, is through an intricate language of hand gestures, used in combination with facial expression and body movements. Kathakali follows the language of Mudras, as described in "Hasthalakshana Deepika".
VEDIC MUDRAS (VEDIC Gestures)
The Vedas Are books of knowledge and known as Sruthi, ‘meaning that which is heard’, because they contain truths which were not fabricated but were ‘heard’ or discovered by great Rishis. Very little is known about these great seers who composed them.