Effect of FN stimulation on area and distribution of unilateral excitotoxic striatal lesions in rat striatum. FN was simulated for 1 hr 3 d before injection of IBO. Lesion volumes were estimated 24 hr thereafter. A, Cross-sectional areas, expressed as mean ± SEM, at different levels of brain along the rostrocaudal axis at sites rostral to the interaural line. Each group represents five sham-stimulated (filled triangles), DN-stimulated (open circles), or FN-stimulated (open squares) rats. *p < 0.05. B, Distribution of lesions at different rostrocaudal levels in representative cases from each group described in A. Stippledepicts the extent of the lesion. Numbers represent the distance from interaural line. Note that only FN stimulation reduces lesion size.