[3H]Choline labeling of cerebellothalamic neurons with observations on the cerebello-thalamo-parietal pathway in cats.

[3H]Choline injected into the ventral lateral thalamic nucleus (VL) labeled cell bodies of the deep cerebellar nuclei and adjacent vestibular nuclei by retrograde axoplasmic transport. Injections in caudal and dorsal parts of VL labeled cells in ventral parts of the dentate nucleus and interpositus posterior nucleus. Injections in rostral and ventral parts of VL labeled cells in the interpositus anterior nucleus and dorsal parts of the dentate nucleus. A few labeled cell bodies were found throughout the rostrocaudal extent of the fastigial nucleus and in adjacent parts of the vestibular nuclei. A combined injection of [3H]choline and [3H]amino acids labeled cells in the deep cerebellar nuclei and axon terminals in layer I of the middle suprasylvian gyrus (areas 5, 7).