Fig. 8.

The densities of serotonergic (SERT), catecholaminergic (TH), and cholinergic (AChE) axons after intracortical infusion of vehicle or BDNF (4 μg/d) for 18 d in intact (non-PCA-lesioned) rats. Values were measured within the area of BDNF-positive immunoreactivity in cortex and expressed as a percentage of the normal density found in the contralateral cortex. White histogram bars,vehicle infusions; black bars, BDNF infusions. *p < 0.05, relative to the vehicle-infused and contralateral cortex (ANOVA followed by the Newman–Keuls multiple range test).