Episodic memory is the record of events that the individual experiences throughout his/her/its life. The events are stored temporarily in the hippocampus and related areas immediately as they happen, and over days and weeks, transferred to other locations for permanent storage. Associative memory involves learning in shorter time-scales and can be readily studied in behavioral experiments in the laboratory. Our research involves trying to understand the structure, capacity, and memory effects through computational modeling, mathematical analysis, and neuroimaging.