hippocampal complex
Acronym: HPC
The term hippocampal complex refers to the functionally defined combination of gray and white matter components that make up the seahorse-shaped structure revealed by dissection on the floor of the lateral ventricle in the human ( Shaw-1997 Glasser-2016 ) and the macaque ( Martin-2000 ). ('Hippocampus' in Latin means 'seahorse' in English.) Part of the cerebral cortex, the hippocampal complex is an infolding of the part of archicortex in the ventral part of the limbic lobe into the lateral ventricle. It consists of three predominantly gray matter structures: the dentate gyrus, CA fields, and subiculum, and two predominantly white matter structures: the alveus and fimbria ( Carpenter-1983 ). While some authors refer to the transition of the CA1 field into the subiculum as a histologically separate structure, the prosubiculum ( Carpenter-1983 Paxinos-2009a ), it does not appear in a functional segmentation of the human cerebral cortex ( Glasser-2016 ).
      In primates the HPC is a relatively flat structure the rostral end of which abuts the amygdala and curves medially to form the uncus. In rodents, where it constitutes a much greater portion of the cerebral cortex it curves up caudally into a C-shaped structure. Updtated 28 May 2024.

Also known as: hippocampus of CrosbyNeuroNames ID : 177


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