Fig 3. Assessment of spatial learning and memory in the Morris swim task in male mice after exposure to 7.5 kHz magnetic fields at 12 or 120 μT.

(a) Relative escape latencies during 5 days of task acquisition. (b) Relative swimming speed. (c) Relative time spent in the pool wall zone. (d) Relative search bias during the probe trial on day 5 as a mean distance to the platform. To control for between-cohort differences, relative values (mean±SEM) are shown in relation to the value observed in the sham-exposed group of each cohort (n = 30 in sham exposed group, n = 20 in each exposed group). * Significant difference from the sham group, p < 0.05 (Dunnett’s test).