Concept

Spatial view cells

Résumé

Spatial view cells are neurons in primates' hippocampus; they respond when a certain part of the environment is in the animal's field of view. They are related to place cells and head direction cells. Spatial view cells differ from place cells, since they are not localized in space. They also differ from head direction cells since they don't represent a global orientation (like a compass), but the direction towards a specific object. Spatial view cells are the cells that respond in the hippocampus when a particular location is being recalled. These cells are identified in the hippocampus of test subjects by monitoring individual neurons while the test subject is moved around in a cue controlled spatial environment. The spatial view cells are the cells that fire consistently when the monkey is looking at a certain direction in the environment; this is independent of the head direction or the location of the monkey. Also, these cells are confirmed to be spatial view cells by observing that there is minimal randomized firing of the cells without the appropriate stimulus present. Spatial view cells can be characterized by the following features: respond to a region of visual space being looked at, relatively independently of where the monkey is located respond to a small number of visual cues generally within a 30° receptive field activated when doing spatial tasks which include active walking in a spatial environment fire relatively independent of the place where the monkey is located represent the place at which the monkey is looking generally stimulated by at least 3 cues present in optimal view fire uniformly all over different areas in space as long as monkey is looking at the same area ability to maintain their spatial properties for periods of up to several minutes in the dark responses depend on where the monkey is looking, by measuring eye position spatial representation is allocentric responses still occur in some cases even if view details are obscured with curtains The spatial view cells that respond in the absence of visual cues are generally found in the Cornu Ammonis area 1, the parahippocampal gyrus, and the presubiculum, while the ones that do not respond are found in the Cornu Ammonis region 3.

Source officielle

https://en.wikipedia.org/wiki/Spatial_view_cells

À propos de ce résultat

Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.