Figure 1.

Effects of long-term exposure to Pb on short-term memory, evaluated by object recognition test. (A) Columns represent the total investigation time of object C1 plus the investigation time of object C2 (C1 + C2), counted in seconds; (B) the recognition index was calculated by the time the animals investigated the new and familiar objects (T - C3/ T + C3) during the test phase, performed 30 min after the training. The results are expressed in mean ± S.E.M of the investigation time in the training phase and recognition index in the test phase, for 3 min. * p < 0.05 compared to the control group (Student’s t-test).