Latency of Recovery and Electrical Silence of Auditory Evoked Potentials and the Electrocorticogram After Peracute Complete Brain Ischemia of 2–30 Minutes’ Duration
1989
The time from the end of complete cerebral ischemia to the reappearance of first potentials of the electrocortigram has been determined in several investigations [e.g. 1,5,7,8,9]. This time interval is called the latency of recovery. There are only a few data about the latency of recovery of auditory evoked potentials after complete brain ischemia, although evoked potentials have great clinical importance for diagnosis and prognosis. The purpose of this paper is to determine the latencies of recovery of the early and middle latency auditory evoked potentials after peracute complete global ischemia lasting 2–30 min. Moreover, the latency of recovery of the electrocorticogram is determined in order to compare the latencies of recovery of auditory evoked potentials with those of the electrocorticogram. Finally, the duration of electrical silence of the auditory evoked potentials is compared with the duration of electrical silence of the electrocorticogram.
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