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Updated: Jun 21, 2026
Electrophysiological Investigations of Retinogeniculate and Corticogeniculate Synapse Function
Published on: August 7, 2019
Bilateral projection of nigro-collicular neurons: An electrophysiological analysis in the rat
J M Deniau1, C Hammond-Le Guyader, J Feger
1Laboratoire de Physiologie des Centres Nerveux, Université Pierre et Marie Curie, 4, avenue Gordon-Bennett, 75016 Paris, France.
Abstract:
In response to stimulation of the deep layers of the superior colliculus (SC) in the rat, nigral neurons were antidromically activated (latency 0.5-1.5 msec). Effective stimulations were located in ipsi- or contralateral SC deep layers lying above the central gray (CG) or more laterally; nigro-collicular neurons are exclusively located in the pars reticulata of the substantia nigra (SN) and some of them project both to ipsi- and contralateral SC. The functional significance of this nigral projection is discussed.
