FIG 3. Plot of ADC versus b value in the rat piriform cortex-amygdala complex after pilocarpine-induced seizures. An isochromatic population features contiguous ADC values that fall on a horizontal line. Dotted line on the control plot illustrates the two isochromats in control animals. The line for low b value (nonzero slope) likely represents a heterogeneous cellular population, whereas the zero-slope line is likely composed of a more homogeneous cellular population. After seizures, ADC decreases, and control isochromats realign (12 and 24 hours). At 7 days, an additional isochromat emerges; this may reflect the histologically evident gliosis in the piriform cortex.