Attached short video briefly overviews the hippocampus. Hippocampus is a part of limbic system and is a constituent of an arrangement called hippocampal formation. The regions of the hippocampus are concisely defined. The circuitry of the hippocampus and other components of limbic system is discussed. 0:08 Introduction 0:23 Hippocampal formation 0:53 Regions of hippocampus 1:11 Circuitry