following an hrp gel implant within the upper portion of the posterior ( caudal ) bank of the intraparietal sulcus , a prominent anterograde terminal projection field , consisting of alternate light and dark ( 300-500 microns ) columns , was observed using low-power dark-field microscopy in the caudal third of the sulcus principalis cortex ( area 46 ) .
C0228213
intraparietal sulcus
C0007776
cortex