The Grīvabhedas, as described in the Abhinaya Darpana are 4 in number.
These Grīvabhedas, or gestures of the neck 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.
Sundarī ća Tiraścīnā tathaiva Parivartitā
Prakampitā ća Bhavagne neiryagrīva ćaturvidha