Figure 4. Effect of saline (open circle; n = 5), 0.3 micro gram bicuculline (closed circle; n = 5), or 1.0 micro gram picrotoxin (closed square; n = 4) on the latency to movement in response to application of an alligator clip to the proximal third of the tail at sub-MAC concentrations of halothane. "B" indicates the baseline measure determined 5-15 min before the intrathecal administration of drug at time zero (arrowhead). Symbols represent the mean+/-SE. Error bars that are not visible were encompassed by the symbol.