at different wavelengths , different opponent cell classes in the parvocellular layers of the nucleus were most sensitive , so that at long wavelengths ( greater than 600 nm ) red on-centre cells were most sensitive , while at short wavelengths ( less than 500 nm ) s-cone , blue on-centre cells were most sensitive , from 500 to about 550 nm green on-centre cells being most sensitive .
C0007610
cell
C0007634
cells