Water maze task. Performance in the water maze shows significant impairment in the aged rats in swim latency (A) in comparison to the young animals with the greatest deficit seen in the aged control group. Analysis of path taken to reach the goal (B) also show that the aged rats was significantly impaired compared to the young animal groups but the aged rats that received vitamin D supplementation performed slightly better. *P <0.05, **P <0.01. Legend: CON, control.