in the present study , wga-hrp was injected into major subdivisions of the mediodorsal nucleus ( md ) in the rhesus monkey in order to determine 1 ) the areal distribution of md projections , 2 ) the layer ( s ) in which md afferents terminate , 3 ) the tangential pattern of the md axonal terminals , 4 ) the cells of origin of the reciprocal corticothalamic pathway , and 5 ) the degree of reciprocity between the corticothalamic and thalamocortical pathways in the different regions of the prefrontal cortex .
C0206181
axonal
C0007634
the cells