these findings strongly suggest that sp-positive neurons in the posterior portion of the cp project to the sn pars lateralis ( posterior strio-nigral sp tract ) , sp-positive cells in the lateroventral part of the anterior portion of the cp extend to the sn pars compacta and pars reticulata , but sp-positive cells in the dorsal part of the anterior portion of the cp do not innervate the sn .
C0175412
sn pars compacta
C0038590
sn