retrograde transport of true blue and/or nuclear yellow revealed inverse gradients along the brain stem longitudinal axis of interdigitated cells respectively projecting caudally into the spinal cord ( with the greatest number of cells in rgc , rpc , and rpo ) and rostrally into the diencephalon ( with the greatest number of cells in rmes and lc ) , with very few cells projecting both to the spinal cord and the diencephalon .
C0006121
brain stem
C0023951
lc