The interrelationship between superior colliculus and substantia nigra pars reticulata in programming movements of cats

Behavioural Brain Research
M Gelissen, A R Cools

Abstract

Recent electrophysiological and behavioural studies have suggested that the deeper layers of the superior colliculus (dl-SC) are involved in the execution of targeting movements which are elicited but not continuously guided by external stimuli. In the first part of the present study the role of the GABAergic transmission in the dl-SC in the execution of these targeting movements was investigated. Therefore cats, trained to walk from one side of a narrow bar towards the target at the other side of the bar under stroboscopic illumination (2 flashes/s), were injected bilaterally in the dl-SC with picrotoxin (100 ng/0.5 microliter) or muscimol (75 ng/1 microliter). In the second part of this study the role of the GABAergic activity in the substantia nigra pars reticulata (SNR), projecting to the dl-SC through the GABAergic nigrotectal pathway, in the execution of the above-mentioned targeting movements was investigated. Therefore cats, trained to walk from one side of a narrow bar towards the target at the other side of the bar, either under full light or under stroboscopic illumination (2 flashes/s), were bilaterally injected in the SNR with picrotoxin (500 ng/0.5 microliter) or muscimol (200 ng/1 microliter). Under stroboscopic ...Continue Reading

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Citations

Oct 2, 1990·Neuroscience Letters·J Leiva, H Saavedra
Aug 1, 1988·Brain Research Bulletin·R B ChronisterL A Marco
Jan 1, 1990·Brain Research Bulletin·R M JaspersA R Cools
Jan 1, 1990·Brain Research Bulletin·A R CoolsB Ellenbroek
Jan 19, 2005·The European Journal of Neuroscience·N L W KeijsersC C A M Gielen

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