How can someone with amnesia get better at a skill without remembering practising it? · Grey Matter

Skills are stored by circuits that do not need the hippocampus: the basal ganglia, the cerebellum and the motor cortex adjust with every repetition, whether or not the repetition is remembered.

How can someone with amnesia get better at a skill without remembering practising it?

Skills are stored by circuits that do not need the hippocampus: the basal ganglia, the cerebellum and the motor cortex adjust with every repetition, whether or not the repetition is remembered. In the early 1960s the patient H.M. traced a star seen only in a mirror over several days and improved steadily, while each day he said he had never done the task before. The dissociation showed that memory is several systems, one that knows that something happened and others that change how something is done.