| 释义 |
hippocampus
hip·po·cam·pus H0212600 (hĭp′ə-kăm′pəs)n. pl. hip·po·cam·pi (-pī′) 1. A ridge in the floor of each lateral ventricle of the brain that consists mainly of gray matter and has a central role in memory processes.2. Variant of hippocamp.
[New Latin, from Late Latin, hippocamp (from the shape of the structure in cross section ); see hippocamp.]
hip′po·cam′pal (-pəl) adj.hippocampus (ˌhɪpəʊˈkæmpəs) n, pl -pi (-paɪ) 1. (Classical Myth & Legend) a mythological sea creature with the forelegs of a horse and the tail of a fish2. (Zoology) any marine teleost fish of the genus Hippocampus, having a horselike head. See seahorse13. (Anatomy) an area of cerebral cortex that forms a ridge in the floor of the lateral ventricle of the brain, which in cross section has the shape of a sea horse. It functions as part of the limbic system[C16: from Latin, from Greek hippos horse + kampos a sea monster] ˌhippoˈcampal adjhip•po•cam•pus (ˌhɪp əˈkæm pəs)
n., pl. -pi (-paɪ, -pi) a curved ridge in the lateral ventricles of the mammalian brain: part of the limbic system. [1600–10; < Latin < Greek hippókampos=hippo- hippo- + kámpos sea monster] hip`po•cam′pal, adj. Thesaurus| Noun | 1. | hippocampus - a complex neural structure (shaped like a sea horse) consisting of grey matter and located on the floor of each lateral ventricle; intimately involved in motivation and emotion as part of the limbic system; has a central role in the formation of memoriesneural structure - a structure that is part of the nervous systemlimbic brain, limbic system, visceral brain - a system of functionally related neural structures in the brain that are involved in emotional behavior | | 2. |  Hippocampus - seahorses genus Hippocampusfish genus - any of various genus of fishfamily Syngnathidae, Syngnathidae - pipefishessea horse, seahorse - small fish with horse-like heads bent sharply downward and curled tails; swim in upright position |
TranslationsSee hippocampus
hippocampus
hippocampus[‚hip·ə′kam·pəs] (anatomy) A ridge that extends over the floor of the descending horn of each lateral ventricle of the brain.
Hippocampus[‚hip·ə′kam·pəs] (vertebrate zoology) A genus of marine fishes in the order Gasterosteiformes which contains the sea horses. hippocampusfabulous marine creature; half fish, half horse. [Rom. Myth. and Art: Hall, 154]See: Monstershippocampus
hippocampus [hip″o-kam´pus] (L.) a curved elevation of gray matter on the floor of the inferior horn of the lateral ventricle; it is an important functional component of the limbic system.hip·po·cam·pus (hip'ō-kam'pŭs), [TA] 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 horn and the dentate gyrus), together with their white matter, the alveus and fimbria hippocampi. In monkeys, apes, and humans, the hippocampus is confined to the temporal lobe by the massive development of the corpus callosum. Cytoarchitecturally a unique form of allocortex (archicortex), the hippocampus forms part of the limbic system (formerly rhinencephalon). Its major afferent connections are with the entorhinal area of the parahippocampal gyrus and with the transparent septum; by way of the fornix, it projects to the septum, anterior nucleus of the thalamus, and mammillary body. Synonym(s): hippocampus major, major hippocampus [G. hippocampos, seahorse] hippocampus (hĭp′ə-kăm′pəs)n. pl. hippocam·pi (-pī′) 1. A ridge in the floor of each lateral ventricle of the brain that consists mainly of gray matter and has a central role in memory processes.2. Variant of hippocamp.
hip′po·cam′pal (-pəl) adj.hippocampus A limbic system structure located in the temporal lobe of the cerebral cortex.
Function
Processing short-term memory, encoding explicit memories for long-term storage, controlling autonomic functions, emotional expression, subjective experience, behavioural expression of affect.
Affected in
Anxiety, bipolarity, depression, panic, post-traumatic stress disorder.hip·po·cam·pus, pl. hippocampi (hip'ō-kam'pŭs, -pī) [TA] The complex, internally convoluted structure that forms the medial margin of the cerebral hemisphere, bordering the choroid fissure of the lateral ventricle, and composed of two gyri (Ammon horn and the dentate gyrus), together with their white matter, the alveus, and fimbria hippocampi. In humans the hippocampus is confined to the temporal lobe by the massive development of the corpus callosum. The hippocampus forms part of the limbic system. 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 mammillary body. [G. hippocampos, seahorse]hippocampus An infolded ridge of the surface of the brain (cerebral cortex) on either side. Each hippocampus forms a ridge on the floor of the LATERAL VENTRICLE. Disease or injury to the hippocampus causes memory defects. PET scanning in young subjects shows that the act of memorization is associated with a 5 per cent increase in blood flow to the hippocampus. From the Greek hippos , a horse, and kampos , a sea monster.hip·po·cam·pus, pl. hippocampi (hip'ō-kam'pŭs, -pī) [TA] The complex, internally convoluted structure that forms the medial margin 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. [G. hippocampos, seahorse]AcronymsSeeHPChippocampus
Related to hippocampus: amygdala, hypothalamus, limbic systemWords related to hippocampusnoun a complex neural structure (shaped like a sea horse) consisting of grey matter and located on the floor of each lateral ventricleRelated Words- neural structure
- limbic brain
- limbic system
- visceral brain
noun seahorsesSynonymsRelated Words- fish genus
- family Syngnathidae
- Syngnathidae
- sea horse
- seahorse
|