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(A and B) The time courses of the weights of the AHRM units tuned to the target spatial frequency (A) and to an irrelevant spatial frequency (B) for Group II (pre-training in high external noise). (C–E) Snapshots of the AHRM weights in all the 35 channels after pre-training in high external noise (C), after 2 days of training in eight levels of external noise (D), and in the end of the experiment (E).
