Fig. 9From: Visual evoked potentials in the horseFVEPs after retrobulbar nerve block. FVEPs recorded at Pz-45 in horse J from the right eye (left column) before retrobulbar nerve block (uppermost tracing), 25, 40 and 90Â min after retrobulbar nerve block (lower tracings). Simultaneous FERG recordings from the right eye are shown in the right columnBack to article page