the corticocortical connections between the arcuate area ( walker 's areas 8a and 45 or brodmann 's area 8 ) and the premotor and supplementary motor areas ( vogts ' area 6 ) in the brain of the macaque monkey were studied microscopically with wheat germ agglutinin-conjugated horseradish peroxidase ( wga-hrp ) , which was injected into brodmann 's area 8 primarily to elucidate the projections of area 8 into area 6 .
C0019941
horseradish peroxidase
C0078473
wga-hrp