This chapter outlines the phenomenon of place cell remapping in more detail. The term ‘remapping’ embodies the assumption of early investigators (and many current ones) that the alteration in firing patterns reflects the establishment of a new spatial representation, or cognitive map. It also refers to localized changes as local remapping, reserving the term partial remapping to reflect a graded nature of global changes to the representation. Remapping may reflect a holistic, network response to environmental or task changes, or it may reflect the differential sensitivities of individual place cells (or some combination of both of these mechanisms). In addition, it is of critical importance to understand how the changes that cause remapping in the hippocampus influence the structures that are upstream of the hippocampus.