 This two-part study will use transcranial magnetic stimulation, or TMS see below, to explore how the brain forms memories. People remember only some of the events they experience every day, such as faces they perceive, words they read, speech they hear and interpret, and so forth. The events remembered are those that have been saved or formed in the brain. Part 1 of this study involves testing materials for Part 2, the TMS experiment. Part 2 uses TMS to examine what parts of the brain are involved in forming memories. Information gained from this study may be used in developing methods of enhancing memory in both healthy people and in patients with memory impairments. 