Open field task: grid crossing (1 min), reflecting initiation of spontaneous motor behavior; mean ± SEM of grid crossings in an 81 × 81 cm² walled box. No significant differences among groups (F_(5,38) = 0.50). Grid crossing (5 min), reflecting exploratory motor behavior; mean ± SEM of grid crossings. No significant differences among groups (F_(5,38) = 0.91). Morris water maze: retention, reflecting recall of the platform position 10 d after the acquisition; mean ± SEM latencies of the retention block of two trials each of 90 sec maximum. No significant forgetting for any group over the retention period (F_(5,38) = 0.56; p > 0.05). Spatial probe, reflecting acuity 1 d after retention, in finding the formerly present platform in the TA as defined by the intersection of PQ and PA; mean percentage of each groups total swimming distance ± SEM during a 90 sec spatial probe. No significant differences in spatial acuity among groups (F_(5,38) = 0.76). Swim speed, reflecting general motor skills in the 90 sec spatial probe trial; mean ± SEM derived from the total distance swum in the fixed time interval. Significant difference in swim speed among groups (F_(5,38) = 3.58; p < 0.01). *Significant difference from PBS/CytC, p < 0.05.