next , using the projection of the paraventricular nucleus of the hypothalamus ( pvh ) to the spinal cord as a test system , it was found by direct cell counts that a considerably greater percentage of cells in a specific subdivision of the nucleus was labeled following true blue injections into the spinal cord ( 88 % ) than was labeled after comparable injections of bisbenzimide ( 58 % ) , or horseradish peroxidase ( hrp ) ( 24 % ) , or after hrp-polyacrylamide gel implants ( 39 % ) .
C0007634
cells
C0007610
nucleus