Igor Gembitsky's Profile

In a series of studies, Mr. Molaison soon altered forever the understanding of learning by demonstrating that a part of his memory was fully intact. A 1962 paper by Dr. Brenda Milner of the Montreal Neurological Institute described a landmark study in which she had Mr. Molaison try to trace a line between two five-point stars, one inside the other.

Each time he tried the experiment, it seemed to him an entirely new experience. Yet he gradually became more proficient — showing that there are at least two systems in the brain for memory, one for events and facts and another for implicit or motor learning, for things like playing a guitar or riding a bicycle.