Spectral components in prepyriform electrical activity and changes at high altitude

摘要: Abstract 1. Spectral analysis of spontaneous electrical activity (SEA) and the averaged evoked potentials (AEP) prepyriform cortex was performed in awake, unrestrained rats chronically implanted with electrodes lateral olfactory tract (LOT) for stimulation recording. Similar spectral components were found both SEA AEP. 2. Three principal spectra, order frequency occurrence, appeared 35–55, 1–5 15–20 c/sec ranges. At low intensity LOT, major peak spectra AEP also occurred 35–55 range. With increasing stimulation, component increased amplitude shifted to c/sec. 3. Exposure simulated 18,000 ft altitude 2 h markedly decreased fastest waves, intermediate either changed lowest very little or it spectra. highest 12,500 frequency, but not amplitude, same component, thus demonstrating that is more susceptible two measures effects high exposure.