highly significantp < 0.0005
In the 1-h period before tetanization, there were no overall differences in mean fEPSP slope values elicited by stimulation of left versus right CA3 [ipsilateral Schaffer collateral: left CA3 = −1.09 ± 0.13 mV/ms; right CA3 = −1.18 ± 0.10 mV/ms; contralateral commissural: left CA3 = −0.76 ± 0.06 mV/ms; right CA3 = −0.72 ± 0.09 mV/ms; overall left versus right comparison: F (1,74) = 0.07; p = 0.79], but a highly significant difference between the fEPSP slopes elicited by contralateral (crossed) versus ipsilateral (uncrossed) CA3 stimulation [ F (1,74) = 15.3; p < 0.0005].