Access to memory also happens unconsciously: even when we try to remember, the actual process is unconscious. It can happen entirely unconsciously. An early experiment by Korsakoff on patients with loss of conscious memory showed this. He gave one patient mild electric shocks. Later, when Korsakoff returned, the patient had forgotten all about it. Yet when he saw the apparatus, the patient showed anxiety, and accused him of wanting to give him an electric shock. The experiment has been repeated since in various ways.