Allocentric egocentric updating spatial memories

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

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I shall argue that allocentric task effects could alternatively be explained via the following processes: (1) mentally shifting (translating, rotating) an object, thereby lining it up with the egocentric midline (or fovea), such that the object's left (right) and the ego's left (right) are equivalent.

Thus, I will argue that neither the way we encode space, nor the way we interact with space, need make use of allocentric spatial reference frames independent of egocentric representations.

Object-based representations do exist, especially in the ventral visual stream, but are not spatial in the sense of referring locations external to the viewer to another external object.

This rule-based response only emerges after training, in contrast to, e.g., bottom-up retinotopic representations; (4) object, landmark, or scene recognition, whereby an object, landmark, or scene has been encoded from one or multiple (egocentric) viewpoints (e.g., by medial temporal lobe memory networks).

View-dependent object or scene recognition then predominantly activates the ventral, rather than dorsal, visual stream, as well as hippocampal and related structures, depending on the task.

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