Hippocampal Neuroanatomy
David G. Amaral, Pierre Lavenex, Ricardo Insausti
Abstract
Abstract This chapter provides an overview of the neurons and intrinsic and extrinsic connections of the rodent, nonhuman primate, and human hippocampal formation. While the hippocampus and related cortical regions have many of the same excitatory and inhibitory neurons as other cortical regions, it also has at least a few neuron types, like the mossy cell, that do not occur in other cortical areas. What is most distinctive about the hippocampal formation is the organization of its intrinsic connections, which are generally, though not exclusively, unidirectional. While there are similarities in the features of the rodent, nonhuman primate, and human hippocampal formation, there are also many substantive differences.