The Department was established in 1947 and is currently divided into three major Departmentsâthe Department of the Army, Navy and Air Forceâand has a military staff of 1,418,542 (553,044 US Army; 329,304 US Navy; 202,786 US Marine Corps; 333,408 US Air Force). The DoD is headed by the Secretary of Defense.
PREEMPTIVE analgesia is an antinociceptive treatment that prevents establishment of altered processing of afferent input, which amplifies postoperative pain. The concept of preemptive analgesia was formulated by Crile at the beginning of the previous century on the basis of clinical observations.
A preemptive action is made to keep some other action from being taken. Before you could be accused of eating the whole cake, you decided to make a preemptive apology, which was met with awkward silence. Tired of being disturbed by your roommate's loud music, your preemptive strike was to crank up your favorite opera as soon as you arrived home. Unfortunately, he'd already made a preemptive strike of his own by borrowing your stereo. Don't confuse preemptive with peremptory, a word meaning âarrogant.â You don't have to be arrogant to make a preemptive move, just cautious.