The lateral group supplies the lateral lemniscus, central tegmental tract and reticular formation. 外侧群动脉分布于外侧丘系、中央束和网状结构;
The capillary density of the central tegmental tract is the highest among the tracts observed and that of the pyramidal tract is the lowest. 纤维束中以被盖中央束的血管密度最高,锥体束的血管密度最低。