Fig. 4. Average intensity—response curves showing the effect of injection of
Ringer's solution into the contralateral optic lobe on light-induced responses
of medulla bilateral neurons (MBNs) during day (A) and night (B). Filled
circles indicate activity before injection and open circles after injection.
Vertical bars indicate ±1 S.E.M. Administration of Ringer's solution
had little effect on MBN photo-responsiveness with the suppression index
SI=1.4±2.3 (mean ± S.E.M., N=6) and
5.2±1.3 (N=8) for day and night, respectively.
