[Organization of contralateral and bilateral projections of corticospinal tracts in cats].

In Cats with a previous spinal lesion (C 6) saving only a lateral or ventral funiculus, a caudal horseradish peroxidase injection (C 8-Th 1) reveals that some cortical zones (lateral sigmoïd gyrus, medial part of the posterieur sigmoïd gyrus, medial part of the dorsal bank of the cruciate sulcus) send spinal projections, only contralaterally, by way of the dorsolateral funiculus, whereas other cortical zones (anterior sigmoïd gyrus, middle part of the posterior sigmoïd gyrus, lateral parts of the dorsal and ventral bank of the cruciate sulcus) send bilateral spinal projections by way of the ventral and dorsolateral funiculi.