(A) Representative fEPSP recordings from brain slices of sham
(green) and LFPI (red) animals (200 μA stimulation intensity).
(B) Average fEPSP slope input-output (I/O) curve (50-500
μA, 50 μA steps, stimulation). LFPI causes a significant decrease
in the BLA I/O curve (sham n=16 slices / 10 animals, LFPI n=14 slices /
7animals, P <0.001***). Black line denotes repeated
measures that are significantly different in post hoc comparisons.
(C) Distribution of fEPSP slopes recorded simultaneously with
VSD imaging experiments (200 μA stimulation). LFPI causes a significant
decrease in the BLA fEPSP slope (sham n=17 slices / 10 animals, LFPI n=14 slices
/ 7animals, P <0.002**). (D) BLA fEPSP
amplitude paired pulse ratio (200 μA stimulation, 70 ms inter stimulus
interval). LFPI has no effect on BLA fEPSP paired puse ratio (sham n=14 slices /
8animals, LFPI n=12 slices / 7 animals, P= 0.999).
(Experimental set-up) Representative brain slice showing
amygdala subregions and electrode placements. “Stim” and
“Record” arrows show placement of tip of stimulation and recording
electrodes.