Sethuraman, MNeema, PKRathod, RC2017-03-102017-03-10200719 ,1;65-6610.1097/01.ana.0000211028.64667.c2https://dspace.sctimst.ac.in/handle/123456789/9927Anesthesiology; Neurosciences & Neurology; SurgeryIncreases in response entropy to skull pin insertion during neurosurgery