Abstract
The rhythmic electrical activity of the cerebellum and the electrical activity of single red nucleus neurones were recorded simultaneously in rabbits under pentobarbital anaesthesia. The following results were obtained: 1. Under pentobarbital, the units of the red nucleus discharge in regular bursts synchronous with the regular, barbiturate-induced electrical activity of the red nucleus and the cerebellum. 2. The bursts of the red nucleus neurones are correlated with the positive peak of the red nucleus rhythm as well as the positive peak of the membrane oscillations of single red nucleus neurones. 3. Calculations were carried out in order to determine how discharge rate and duration of bursts of single red nucleus neurones as well as frequency of red nucleus rhythm depend on pentobarbital concentration in blood.
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