Abstract

Caudato-nigral synaptic transmission was examined by stimulation of the caudate nucleus while recording from nigral neurons in cats recovering from circling movements induced by a unilateral circumscribed lesion in the substantia nigra pars reticulata after microinfusion of ibotenic acid. Extra- and intracellular recording from neurons in lesion-spared areas of the substantia nigra pars reticulata indicated that the caudato-nigral synaptic action on the side ipsilateral to the lesion exhibited a shorter duration of inhibition and a larger amplitude of excitation as a means of compensating for the circling movements.

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