TY - JOUR
T1 - Exploration in a dark open field
T2 - A shift from directional to positional progression and a proposed model of acquiring spatial information
AU - Avni, Reut
AU - Zadicario, Pazit
AU - Eilam, David
N1 - Funding Information:
We are grateful to Ana Roitburd and Amos Geva for their help in testing and data acquisition, to Osnat Yaski and Meirav Benedek for their comments, to Naomi Paz for editing, and to Barak Levy and the zookeepers of the I. Meier Segals Garden for Zoological Research for maintenance of the jird colony. This research was supported by The Israel Science Foundation, Grant 471/04.
PY - 2006/8/10
Y1 - 2006/8/10
N2 - 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).
AB - 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).
KW - Cognitive map
KW - Dead reckoning
KW - External cues
KW - Internal cues
KW - Navigation
KW - Orientation
KW - Piloting
KW - Systematic search
UR - http://www.scopus.com/inward/record.url?scp=33745335274&partnerID=8YFLogxK
U2 - 10.1016/j.bbr.2006.04.006
DO - 10.1016/j.bbr.2006.04.006
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C2 - 16712970
AN - SCOPUS:33745335274
SN - 0166-4328
VL - 171
SP - 313
EP - 323
JO - Behavioural Brain Research
JF - Behavioural Brain Research
IS - 2
ER -