Abstract
A longitudinal parasagittal organization (alternating labeled and unlabeled stripes) of mossy fiber terminals in the paraflocculus and in the vermal lobule VII of the cerebellum was found after small injections (less than 50 nl) of wheat germ agglutinin-horseradish peroxidase (WGA-HRP) into discrete regions of the basilar pontine nuclei (BPN) of rats. Up to three stripes were found within the paraflocculus of both sides, following injections (of about 500 μm in diameter) in either the medial or lateral region of the caudal half of the BPN. Up to five stripes were found in the vermal lobule VII after similar size injections into the rostro-ventral region of the BPN. These results emphasize the possibility that the parasagittal zonal arrangement could be a common pattern of organization shared by climbing and mossy fiber afferents.
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