Projection pattern of vestibulocerebellar fibers in the anterior vermis of the cat: an anterograde wheat germ agglutinin-horseradish peroxidase study.

The distribution of mossy fiber terminals of vestibulocerebellar fibers was studied in the anterior lobe following a unilateral injection of wheat germ agglutinin-horseradish peroxidase into the medial and descending vestibular nuclei in the cat. In the transverse plane 3 groups of labeled terminals were seen bilaterally: group 1 located in the midline region, group 2 at 0.5 mm, and group 3 between 0.75 and 1.5 mm lateral to the midline. Reconstruction of the distribution in the horizontal plane revealed that the labeled terminals were distributed in 3 areas extending apicobasally in the basal part of the lobules.