Head movements are called shiro Bheda. The head movements refer to the head positions, while expressing a particular bhava. There are nine types of head movements.
Application: Pride, paralysis, inaction, affection, anger (narasimha Avatara)
Application: Shyness or modesty, sorrow, bowing, evil thought,
fainting,looking at objects on the earth, a plunge into the water (kalia)
Application: Looking at a flag, birds, moon, sky, mountain, birds.
Application: Sleepiness, excitement, possessed by spirits, intoxication and fainting , unfair and uncontrollable laughter.
Application: Denial or to say No, looking towards the sides repeatedly,
empathizing with people, astonishment, glancing at ones own limbs,
summoning from both sides, bitting cold.
Application: Indignation, asking to sit, questioning, summoning , cautioning.
Application: To show someone’s hair, to show back
Application: passion, yearning for the beloved, sorrow
Application: Saying take this, come here