The Journal of Neuroscience, March 1, 1998, 18(5):1818-1826
Spatial Firing of Hippocampal Place Cells in Blind Rats
Etienne
Save,
Arnaud
Cressant,
Catherine
Thinus-Blanc, and
Bruno
Poucet
Centre for Research in Cognitive Neuroscience, Centre National de
la Recherche Scientifique, 13402 Marseille Cedex 20, France
The rat hippocampus contains cells that are characterized by
location-specific firing. Previous work has shown that the angular position of hippocampal place cell firing fields is accurately controlled by the position of visual cues, suggesting that vision plays
a important role in triggering place cell activity. However, a role for
other types of information has also been suggested because place cell
activity can be recorded while animals are moving in the darkness. In
this study, we asked whether place fields can get established in rats
that have never seen their environment. We studied place cell activity
in early blind rats and found that these rats had place cells very
similar to those recorded from sighted rats. This result suggests that
early vision is not necessary for normal firing of hippocampal place
cells. Dynamic, motion-related information in conjunction with stimulus recognition seems to be sufficient.
Key words:
hippocampus; unit recordings; place cells; spatial
learning; spatial memory; vision; path integration; rat
Copyright © 1998 Society for Neuroscience 0270-6474/98/1851818-09$05.00/0