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Secondary trigeminocerebellar projections in sheep studied with the horseradish peroxidase tracing method
Author(s) -
Saigal R. P.,
Karamanlidis A. N.,
Voogd J.,
Mangana O.,
Michaloudi H.
Publication year - 1980
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.901890307
Subject(s) - anatomy , flocculus , biology , horseradish peroxidase , lobe , cerebellum , nucleus , axoplasmic transport , dorsum , cortex (anatomy) , neuroscience , biochemistry , enzyme
Secondary trigeminocerebellar connections have been studied with HRP histochemistry in 25 sheep. The results indicate that almost all of the cerebellar cortex except flocculus, ventral paraflocculus and lobules I‐IV receives bilateral (mostly ipsilateral) fibers from the trigeminal nuclei. A topographical organization of trigeminocerebellar fibers is present. The mesencephalic tract nucleus projects to the anterior lobe, the simple lobule (HVI), lobules VI, VIII, and the dorsal paraflocculus. The ventral group of the princeps and spinal tract (mainly IDV) nuclei projects to all lobules studied in vermis and hemispheres. More dorsal parts of these nuclei have a more restricted projection field including the vermal lobules VI, VII, and IX and the hemisphere. Cells within and ventral to the motor nucleus of the trigeminal nerve were found labeled after injections into the anterior lobe, the simple lobule, and lobule IX. Labeled cells in the region of the nucleus ovalis and close to the solitary tract project to the simple and paramedian lobule and lobule IX.