Effects of new neuron production inhibition by 137Cs irradiation on hidden DMTP performance. Irradiation drastically reduced the number of DCX+ immature neurons in the GCL (A) compared to sham irradiated controls (B). Both sham-irradiated controls (Sham-irr, n = 10) and irradiated mice (n = 10) showed significant retention scores following a 1-minute and 1-hour, but not 24-hour, retention interval (C). However, neither retention interval nor irradiation affected retention scores.
*p < 0.01 compared to zero by one-sample Student's t-test.