Influence of mesencephalic and diencephalic stimulation on limbic system seizures

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Abstract
Seizures were produced electrically in 44 cats. Brain stem stimulation did not alter the fixed characteristics of the seizures which were regularly and repeatedly observed. Mesencephalic and hypothalamic stimulation reduced seizure duration and variability; the thalamus produced opposite effects. Short and long lasting effects were observed short effects caused by direct neuronal stimulation and long effects caused by induced humoral changes. Duration and variability were independent of behavioral and eeg changes described as activation. These changes due to thalamic stimulation were independent of thalamic recruiting responses. Sleep spindles appeared from the cingulate gyrus more often than from other limbic structures.

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