The Shirobhedas, as described in the Abhinaya Darpana are 9 in number.
These Shirobhedas, or gestures of the head are used primarily communicate meaning gesturally, and also used for specificity in Nritta.

Please refer to the Shloka below for pronunciation. Please note that the separate movements of the head when put together in a Shloka form 'Sandhis', or compound words in the Sanskrit language. Words like 'ca', 'thatha', mean "and", "also". The separate words for each movement are also given below the shloka.

Samamudvāhitamadhomukhamālolitam dhutam
Kampitam ća Parāvrttamutksiptam Parivāhitam
Navadha kathitam sirsham natyasastravisharadhaihi

Sama
Udvāhita
Adhomukha
Ālolita
Dhuta
Kampita
Parāvrtta
Utksipta
Parivāhita