Allocentric egocentric updating spatial memories Free sexy chat rooms with girls without registration

09 Feb

Among the different types of spatial processing, the allocentric, relying on the hippocampal formation, and the egocentric-updated, relying on parieto-temporal connections have both been considered to functionally underlie episodic memory encoding and retrieval.

We explore the cerebral correlates underlying the episodic retrieval of words previously learnt outside the magnet while performing different spatial processes, allocentric and egocentric-updated. Recognition memory: a review of the critical findings and an integrated theory for relating them.

Episodic memory was originally described as the ability to recollect specific events and includes spatial and temporal information of the individual's life (Tulving, 1972). Recalling routes around London: activation of the right hippocampus in taxi drivers.

Based on this original definition and on neuropsychological findings in amnesic patients, it is generally agreed that spatial cognition and episodic memory are intimately linked (O' Keefe and Dostrovsky, 1971; O' Keefe and Nadel, 1978; Holdstock et al., 2000; Spiers et al., 2001a,b; Burgess et al., 2002; King et al., 2002).

In other words, does the brain represent map-like spatial layouts, or spatial locations of objects and landmarks, in an allocentric, or “other-centered” spatial reference frame, independent of the ego's perspective or location?

Does the choice of spatial reference frame depend on (passive) perception vs.

No additional regions were activated in the present study by retrieving words learnt in allocentric condition.

This study sheds new light on the functional links between episodic memory and spatial processing: The temporo-parietal network is confirmed to be crucial in episodic memory in healthy participants and could be linked to the egocentric-updated process.

Here, I review behavioral, neuropsychological, neurophysiological (neuronal recording), and neuroimaging evidence for and against allocentric, object-centered, or world-centered spatial reference frames.

According to the Cognitive Map theory (O' Keefe and Nadel, 1978), allocentric spatial maps stored in the hippocampus have evolved in humans to support the spatio–temporal context of episodic memories (Burgess, 2008).

The use and neural representation of egocentric spatial reference frames is well-documented.

sensorimotor interactions with the environment, such as target-directed movements or navigation?

It is well-established that neurons in many brain regions, especially parieto-frontal cortex, represent the spatial location of objects in egocentric spatial reference frames, centered on various body parts such as the eye (retina), the head, or the hand (Colby, 1998; Hagler et al., 2007; Sereno and Huang, 2014).