Cerebellar targets of visual pontine cells in the cat.
Publication/Presentation Date
3-10-1984
Abstract
The cerebellum receives visual mossy fiber input from the cerebral cortex via visual cells in the pons. We identified the regions of cat cerebellum that receive cerebral visual input by injecting orthograde tracers among physiologically identified visual pontine cells. Cerebellar labeling following these injections indicates that the contralateral paraflocculus and the rostral folium of the uvula (vermal lobule IX) receive the heaviest projection from cortically activated pontine visual cells. Lighter visual input reaches much of the rest of the contralateral posterior lobe. A second experiment combined, in the same animal, orthograde tracing of the visual corticopontine pathway with retrograde tracing of the pontocerebellar projection. The results of this experiment confirm that the paraflocculus and uvula receive more cortical visual input than do other regions of the cerebellum. This experiment also shows that uvula-projecting and paraflocculus-projecting cells occupy different parts of the ventromedial pons. Uvula-projecting cells cluster immediately adjacent to the ventral and medial borders of the pyramidal tract and near the midline. Paraflocculus-projecting cells lie ventral and medial to the pyramidal tract but displaced from its border. There are few paraflocculus-projecting cells near the midline.
Volume
223
Issue
4
First Page
471
Last Page
482
ISSN
0021-9967
Published In/Presented At
Robinson, F. R., Cohen, J. L., May, J., Sestokas, A. K., & Glickstein, M. (1984). Cerebellar targets of visual pontine cells in the cat. The Journal of comparative neurology, 223(4), 471–482. https://doi.org/10.1002/cne.902230402
Disciplines
Medicine and Health Sciences
PubMedID
6325507
Department(s)
Department of Medicine
Document Type
Article