employing a retrograde fluorescent double labeling technique , we compared the localization of subthalamic nucleus ( stn ) cells projecting to the striatum and nucleus tegmenti pedunculopontinus pars compacta ( tpc ) , with that of stn cells sending axon collaterals to both the globus pallidus and substantia nigra in the rat .
C0175412
pars compacta
C0038590
substantia nigra