Fig. 8.

The strychnine-mediated changes in excitatory currents measured in two ganglion cells. Cells were clamped to −60 mV to isolate the excitatory currents. A, The currents were reduced by ∼40% in this cell without any significant effect on the timing of the response. B, In another ganglion cell, the excitatory current was delayed by ∼50 msec in the presence of strychnine, and the response magnitude was reduced by ∼40%.