CNS injuries in brain contusions of a moderate and severe gravity leave lasting EEG traces that can be revealed on examining the patients in the state of sleep and drowsiness, and manifest in the form of pathological oscillations of the slow electrical processes in the second and decasecond intervals. These oscillations have an amplitude of 0.2 to 1.0 mV and more. In the course of brain function normalization the amplitude of the oscillations gradually decreases down to 0.05-0.15 mV. The pathological oscillations of the slow electrical processes in brain contusions are often more demonstrative than EEG changes.
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