Abstract
The authors describe the EEG recordings of 107 patients with acute severe cranial trauma and signs of axial lesions. The initial EEG included: sleep patterns, alternating tracings, alpha band tracings which were either nonreactive pseudo-alpha or modulated alpha often reactive, and diffuse slow wave tracings. They found no particular tracing corresponding to a precise level of rostrocaudal destructuration, but some associations were seen more frequently. EEG sleep patterns and alternating tracings were never observed in brain stem lesions, the activity recorded being of low voltage, rigid, and non-reactive. The presence of spontaneous fluctuations (with sleep rhythms in some cases) and reactivity in other levels (mesodiencephalic junction, diencephalic and cortical-subcortical) are good prognostic signs. Focalised EEG signs are seen especially in the more rostral levels.
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