![]() ![]() These inconsistent results may be the result of the anatomic and possible pharmacodynamic separation of the neural circuitry responsible for movement responses (spinal cord) from those responsible for the generation of the EEG signal (cerebrum). However, later attempts to correlate EEG with gross purposeful movement in response to surgical incision have not uniformly reported positive results. The degree of EEG depression before laryngoscopy correlated with magnitude of hemodynamic change after intubation. The first reported relationship compared EEG with changes in blood pressure after noxious stimulation. ![]() The choice of physiologic end-point against which to correlate or test the EEG has proven critical. ![]()
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