Figure 5.

Electrophysiological clusters of V3 INs are topologically distributed in the spinal cord. A, Cross-section map of V3 neurons divided into cluster 1 (light gray) and cluster 2 (dark gray). The dark line indicates the principal axis of the location of cells in the cross section, and a bold “x” labels the center of the axis. Dashed lines are the presumed borders of ventral, intermediate, and dorsal separations. B, Plot of the value of PC1 as a function of distance along the axis. The dashed lines in A and the dark lines in B indicate the arbitrary borders to separate the ventral, intermediate, and dorsal populations.