This document discusses learning and memory. It defines learning, memory, and the three facets of learning and memory - acquisition, storage, and retrieval. It describes studies on patient HM which showed the role of the hippocampus in forming new memories. It discusses explicit and implicit memory, as well as non-associative and associative learning. It explains synaptic plasticity mechanisms like long-term potentiation and long-term depression that are involved in memory formation. It also discusses dementia, with a focus on Alzheimer's disease.