Grid cells in 3-D: Reconciling data and models.
It is well documented that place cells and grid cells in echolocating bats show properties similar to those described in rodents, and yet, continuous theta-frequency oscillations, proposed to play a central role in grid/place cell formation, are not present in bat recordings. These comparative neurophysiological data have raised many questions about the role of theta-frequency oscillations in spatial memory and navigation. Additionally, spatial navigation in three-dimensions poses new challenges for the representation of space in neural models. Inspired by the literature on space representation in the echolocating bat, we have developed a nonoscillatory model of 3-D grid cell creation that shares many of the features of existing oscillatory-interference models. We discuss the model in the context of current knowledge of 3-D space representation and highlight directions for future research.
Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland.
Timothy K
TK
Horiuchi
Department of Psychology, Institute for Systems Research, University of Maryland, College Park, Maryland.
Cynthia F
CF
Moss
D000818:Animals; D002685:Chiroptera; D004455:Echolocation / Q000502:physiology; D006624:Hippocampus / Q000502:physiology; D008959:Models, Neurological; D009474:Neurons / Q000502:physiology*; D051381:Rats; D065854:Spatial Navigation / Q000502:physiology*; D013826:Theta Rhythm / Q000502:physiology
bat; grid cells; hippocampus; place cells; space representation