The projections from the lowest thoracic and upper lumbar (T13 to L3) segments to the cerebellar cortex were examined by anterograde tracing with biotinylated dextran amine in the rat. Unilateral injections resulted in bilateral labeling of mossy fiber terminals in lobules Ib to VI, VIII, IX and copula pyramidis. The majority (64 % of the total 30,526 labeled terminals) were present ipsilaterally in lobules II (8.5 %), III (20 %), IV (11 %), V (12 %), VIII (4.1 %), and copula pyramidis (6.8 %). The projection field in the anterior lobe was composed of five longitudinal areas: area 1 in the midline region, areas 2 and 3 in the middle and lateral parts of the vermis, and areas 4 and 5 in the medial part of the intermediate region of the hemisphere. The projection areas are characteristically localized in the apical to the middle part of the lobule. In the posterior lobe, the longitudinal areas were present in the midline region, the middle and lateral parts of lobules VIIIa and VIIIb, and the medial and middle parts of copula pyramidis. The present study reveals the whole areas and the pattern of projections from the segments containing the cells of origin of the dorsal and ventral spinocerebellar tracts.

通过生物素化葡聚糖顺行追踪检查从最低胸段和上腰段（T13 至 L3）到小脑皮层的投影大鼠体内的胺。单侧注射导致小叶 Ib 至 VI、VIII、IX 和锥体连接体中苔藓纤维末端的双侧标记。大多数（总共 30,526 个标记末端的 64%）同侧存在于小叶 II (8.5%)、III (20%)、IV (11%)、V (12%)、VIII (4.1%) 和 copula pyramidis (6.8%)。前叶的投影场由五个纵向区域组成：中线区域的区域1，蚓部中部和外侧部分的区域2和3，以及中间区域的内侧部分的区域4和5。半球。投影区域特征性地位于小叶的顶端到中间部分。在后叶，纵向区域存在于中线区域，小叶VIIIa和VIIIb的中间和外侧部分，以及锥体的中部和中部。本研究揭示了包含背侧和腹侧脊髓小脑束起源细胞的节段的整个区域和投影模式。