Skip to main content
. 2001 Mar 15;531(Pt 3):807–826. doi: 10.1111/j.1469-7793.2001.0807h.x

Figure 7. Concentration-dependent effect of internal BAPTA or EGTA on release from pyramidal cell terminals contacting bitufted or multipolar cells.

Figure 7

A, graph of the presynaptic BAPTA and EGTA concentration-dependent effect on the mean amplitude of unitary EPSP evoked by AP stimulation of terminals contacting bitufted cells. Mean EPSP amplitude was normalized to control values determined in the same connection before loading with buffer. The half-effective concentrations (when the mean EPSP amplitude was reduced to 50 % of the control; dashed lines) were 0.1 mm BAPTA and 1 mm EGTA, respectively. B, graph of the presynaptic BAPTA and EGTA concentration-dependent effect on the mean amplitude of EPSPs evoked by AP stimulation of terminals contacting multipolar cells. The half-effective concentrations (dashed lines) were 0.5 mm BAPTA and 7 mm EGTA. The lines connecting the data points were calculated by double exponential fits.