hippocampus

hippocampus (hip-o-kam´pus) [NA]

The complex, internally convoluted structure that forms the medial margin ("hem") of the cortical mantle of the cerebral hemisphere, bordering the choroid fissure of the lateral ventricle, and composed of two gyri (Ammon's horn and the dentate gyrus), together with their white matter, the alveus and fimbria hippocampi. In monkeys, apes, and humans the h. is confined to the temporal lobe by the massive development of the corpus callosum. Cytoarchitecturally a unique form of allocortex (archicortex), the h. forms part of the limbic system (formerly rhinencephalon). Its major afferent connections are with the entorhinal area of the parahippocampal gyrus, and transparent septum; by way of the fornix it projects to the septum, anterior nucleus of the thalamus, and mamillary body.h. major, major h; [G. hippocampos, seahorse]
h. ma´jor hippocampus
major h. hippocampus
h. mi´nor calcar avis
minor h. calcar avis

 

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