A system for life support in high performance avionics that utilizes cerebral blood flow velocity measurements and responses to real-time neuropsychological tests of brain function, to accomplish prevention of gravitational loss of consciousness, determination of cognitive state-of-being of the crewmember, regulation of autonomy-decision making level, while taking into account individualized +Gz-tolerance and cognitive abilities under +Gz-stress, comprising a transcranial Doppler device, attached to a microcomputer, operatively connected to the mainframe avionic computer.
