Journal of Neuroanaesthesiology and Critical Care [Thieme Medical and Scientific Publishers Private Ltd. 15th Annual Conference of the Indian Society of Neuroanaesthesiology and Critical Care - Lucknow, India (2015.01.30-2015.02.01)] 15th Annual Conference of the Indian Society of Neuroanaesthesiology and Critical Care - Attenuation of extubation responses: Comparison of prior treatment with verapamil and dexmedetomidine