Abstract:
:Exploration in a dark open field undergoes three progressive changes: (i) an initial phase of spending equal amounts of time in various zones of the arena changes to staying in the corners, and ultimately spending most of the time in one corner; (ii) travel paths are first circular and scattered all over the arena, but gradually become anchored to one corner at which they start and end; (iii) traveled distance gradually decreases to that of the initial level seen in a lit open field. Altogether, rodents shift from a 'looping' exploration mechanism with feeble coupling with the environment, to 'home base' exploration which is firmly anchored to the environment. This shift also involves switching from momentary and sporadic to repeated returns to a specific, presumably familiar place, to which the animal navigates back from various other places. We suggest that this switching illustrates navigation first by directional and then by positional environmental cues, as hypothesized in the 'parallel map theory'. We also suggest that the transition from looping to home base behavior is part of a hierarchal construction of space representation via three modes of spatial information processing: (i) piloting--sequential processing, based on moving from one landmark to the next; (ii) orienting--parallel processing, based on moving from one point to the next, with the same starting and ending point; (iii) navigating--continuous processing, based on continuously updating the position in relation to several locations in the environment (map navigation).
journal_name
Behav Brain Resjournal_title
Behavioural brain researchauthors
Avni R,Zadicario P,Eilam Ddoi
10.1016/j.bbr.2006.04.006subject
Has Abstractpub_date
2006-08-10 00:00:00pages
313-23issue
2eissn
0166-4328issn
1872-7549pii
S0166-4328(06)00209-9journal_volume
171pub_type
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