14 papers · ranked by Valyu relevance
Thomas Nortmann, Philip Sulewski, Tim C. Kietzmann
Despite moving our eyes from one location to another, our perception of the world is stable - an aspect thought to rely on predictive computations that use efference copies to predict the upcoming foveal input. Are these complex computations genetically hard-coded, or can they emerge from simpler principles? Here we…
Liu Zhou, Wei Wei, Teng Leng Ooi, Zijiang J. He
We reliably judge locations of static objects when we walk despite the retinal images of these objects moving with every step we take. Here, we showed our brains solve this optical illusion by adopting an allocentric spatial reference frame. We measured perceived target location after the observer walked a short…
Léo Dutriaux, Yangwen Xu, Nicola Sartorato, Simon Lhuillier + 1 more
The neural system that encodes heading direction in humans is found consistently in the medial and superior parietal cortex and the entorhinal-retrosplenial circuit. However, it is still unclear whether heading direction in these different regions is represented within an allocentric or egocentric coordinate system. To…
Miriam L. R. Meister, Elizabeth A. Buffalo
Primates predominantly rely on vision to gather information from the environment, and neurons representing visual space and gaze position are found in many brain areas. Within the medial temporal lobe, a brain region critical for memory, neurons in the entorhinal cortex of macaque monkeys exhibit spatial selectivity…
Vishal Bharmauria, Amirsaman Sajad, Jirui Li, Xiaogang Yan + 2 more
The visual system is thought to separate egocentric and allocentric representations, but behavioral experiments show that these codes are optimally integrated to influence goal-directed movements. To test if frontal cortex participates in this integration process, we recorded primate frontal eye field (FEF) activity…
Mathilde Nordlund, Nicolas Levernier, Massimiliano Trippa, Romain Bourboulou + 5 more
Animals navigate using cognitive maps of their environment, integrating external landmarks and distances between them. Hippocampal place cells are the neuronal substrate of these cognitive maps. However, while hippocampal allocentric position coding in reference to external landmarks is well characterized, the…
Pierre-Pascal Forster, Katja Fiehler, Harun Karimpur
Allocentric and egocentric reference frames are used to determine the spatial position of action targets in reference to objects in the environment, i.e., landmarks (allocentric), or the observer (egocentric). Previous research investigated reference frames in isolation, for example, by shifting landmarks relative to…
Parisa Abedi Khoozani, Vishal Bharmauria, Adrian Schütz, Richard P. Wildes + 1 more
Allocentric (landmark-centered) and egocentric (eye-centered) visual codes are fundamental for spatial cognition, navigation, and goal-directed movement. Neuroimaging and neurophysiology suggest these codes are segregated initially, but then reintegrated in frontal cortex for movement control. We created and validated…
L. Musa, A. Ghaderi, Y. Chen, J.D Crawford
Humans can be instructed to ignore visual cues or use them as landmarks for aiming movements (54), but it is not known how such allocentric cues interact with egocentric target codes and general planning activity to influence cortical network properties. To answer these questions, we applied graph theory analysis (GTA)…
Fish Kunxun Qian, Yiding Li, Jeffrey C. Magee
CA1 hippocampal place cells (PCs) are known for using both self-centric (egocentric) and world-centric (allocentric) reference frames to support a cognitive map^1,2^. The mechanism of PC referencing and the role of experience in this process, however, remain poorly understood^3–5^. Here we longitudinally recorded the…
Daniel Shani, Peter Dayan
Egocentric representations of the environment have historically been relegated to being used only for simple forms of spatial behaviour such as stimulus-response learning. However, in the many cases that critical aspects of policies are best defined relative to the self, egocentric representations can be advantageous.…
Lukas Kunz, Armin Brandt, Peter C. Reinacher, Bernhard P. Staresina + 8 more
Spatial navigation relies on neural systems that encode information about places, distances, and directions in relation to the external world or relative to the navigating organism. Since the proposal of cognitive maps, the neuroscience of navigation has focused on allocentric (world-referenced) neural representations…
Simone Viganò, Rena Bayramova, Christian F. Doeller, Roberto Bottini
The human hippocampal-entorhinal system is known to represent both spatial locations and abstract concepts in memory in the form of allocentric cognitive maps. Using fMRI, we show that the human parietal cortex evokes complementary egocentric-like vector representations in conceptual spaces during goal-directed mental…
Jordan Carpenter, Jan Sigurd Blackstad, David Tingley, Valentin A. Normand + 3 more
Navigation requires integrating sensory information with a stable schema to create a dynamic map of an animal’s position using egocentric and allocentric coordinate systems. In the hippocampus, place cells encode allocentric space, but their firing rates may also exhibit directional tuning within egocentric or…