Electrophysiological analysis of the tecto-olivocerebellar (lobule VII) projection in the rat.

In albino rats the superior colliculus was stimulated and its evoked potentials were explored throughout the posterior vermis of the cerebellum. Climbing fiber responses were identified only in lobule VII, ipsilaterally 1.2-1.6 mm wide. In the medial accessory olive, subnucleus c, in the contralateral side both antidromically evoked potentials from lobule VII and orthodromically evoked potentials from the superior colliculus were recorded. This evidence suggests that they are tecto-olivocerebellar projections.