08:30 - 10:00
Mon-B21-Talk I-
Mon-Talk I-
Room: B21
Chair/s:
Sein Jeung, Klaus Gramann
This session puts together research works that are central to understanding spatial navigation and its neural underpinnings. The talks will introduce the neural basis of spatial navigation in animal and human research along with new insights from studies coupling mobile brain imaging with virtual reality (VR) and real-world tasks as well as works on
geometric representations of space and the impact of aging on navigation abilities. Different navigation strategies such as path integration and landmark-based navigation are supported by neural populations in the medial temporal lobe [1]. Electrophysiology recorded in animals can be used to establish, validate, and refine computational models that are linked with testable behavioral predictions on how space is represented and remembered. Methodological advances such as immersive VR and mobile brain imaging enable the translation of key findings from animal research on the aforementioned brain regions to humans. The use of VR in spatial navigation research allows for flexible manipulation of space in a way that is not possible in physical space, while providing participants with rich, naturalistic stimuli [2,3]. By enabling participants to make use of a natural mode of locomotion (e.g., walking through physical space), mobile brain imaging methods such as mobile EEG [2,5] afford the investigation of how body-based information influences navigation strategies. A better understanding of how humans navigate through space is of great applied value as they inform us about the nature of cognitive decline in older adults [4] and support development of effecient navigation aids [5].
 Investigating the neuronal basis of homing based on path integration
Mon-B21-Talk I-01
Presented by: Kevin Allen
Kevin Allen
Medical Faculty of Heidelberg University and DKFZ
Path integration refers to the ability of an animal to keep track of its position by integrating self-motion cues. Studies in rodents and humans point to an essential role of the hippocampal and parahippocampal areas in this process. These brain areas contain numerous types of spatially selective neurons, including place and grid cells. How these cells contribute to navigation based on path integration has remained unclear, as these cells are usually not recorded in animals navigating using path integration. I will present a new homing task for mice that we developed to characterize the activity of spatially selective neurons in mice navigating using path integration. I will describe how the activity of hippocampal place cells might contribute to homing based on path integration.
Keywords: path integration, navigation, hippocampus, entorhinal cortex, place cells, grid cells