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Percentage of time spent in the correct quadrant in the probe test of the Morris water maze expressed as % in male and female rats after 8 weeks of treatment with 0.9% of NaCl (Control), 0.25 mg/kg (Ni-0.25) 0.5 mg/kg (Ni-0.5), and 1 mg/Kg (Ni-1) of Ni. Results are represented as mean ± SEM. The significance level is 0.05. * p < 0.05.
