hippocampus (redirected from Ammon's horns)

hippocampus /hip·po·cam·pus/ (hip″o-kam´pus) [L.] a curved elevation in the floor of the inferior horn of the lateral ventricle; a functional component of the limbic system, its efferent projections form the fornix.hippocam´pal

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hip·po·cam·pus (hp-kmps)

n. pl. hip·po·cam·pi (-p)

The complex, internally convoluted structure that forms the medial margin of the cortical mantle of the cerebral hemisphere, borders the choroid fissure of the lateral ventricle, is composed of two gyri with their white matter, and forms part of the limbic system.

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hippo·campal (-pl) adj.

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hippocampus

[hip′ōkam′pəs] pl. hippocampi

Etymology: Gk, hippokampos, seahorse

a curved convoluted elevation of the floor of the inferior horn of the lateral ventricle of the brain. It is composed of gray substance covered by a layer of white fibers, the alveus, and functions as an important component of the limbic system and of memory processing. Its efferent projections form the fornix of the cerebrum. Also called Ammon's horn, hippocampus major.

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hippocampus (hip·pō·kamˑ·ps),

n a part of the brain in the lateral ventricle that is important in learning and memory.

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hippocampus (hip´ōkam´ps),

n a curved convoluted elevation of the floor of the inferior horn of the lateral ventricle of the brain. It is composed of gray substance covered by a layer of white fibers, or the alveus, and functions as an important component of the limbic system.

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Hippocampus

see sea horse.

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hippocampus

pl. hippocampi [L.] in evolutionary terms, an old part of the cerebral cortex that forms part of the floor of the lateral ventricle; identified by its white surface and convoluted appearance on section. It is examined for Negri bodies in suspected cases of rabies.

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hippocampus major

hippocampus.

hippocampus minor

the lower of two medial elevations in the lateral cerebral ventricle.