Results 11 to 20 of about 7,186,907 (267)
Grid cells are modulated by local head direction [PDF]
Nature Communications, 2020 Neurons with grid firing fields are thought to play important roles in spatial cognition. Here, the authors show that in contrast to assumptions underlying current models and analyses, grid fields are modulated by local head direction; this suggests ...
Klara Gerlei +6 more
doaj +7 more sources
The Neural Correlates of Spatial Disorientation in Head Direction Cells. [PDF]
eNeuro, 2022 While the brain has evolved robust mechanisms to counter spatial disorientation, their neural underpinnings remain unknown. To explore these underpinnings, we monitored the activity of anterodorsal thalamic head direction (HD) cells in rats while they underwent unidirectional or bidirectional rotation at different speeds and under different conditions (
Grieves RM +4 more
europepmc +5 more sources
Granularity of thalamic head direction cells [PDF]
Abstract Head direction signaling is fundamental for spatial orientation and navigation. The anterodorsal nucleus of the thalamus (ADn) contains a high density of head direction (HD) cells that process sensorimotor inputs for subsequent synaptic integration in postsynaptic cortical areas.
Hijazi S +6 more
europepmc +3 more sources
Topography of Head Direction Cells in Medial Entorhinal Cortex [PDF]
Current Biology, 2014 Neural circuits in the medial entorhinal cortex (MEC) support translation of the external environment to an internal map of space, with grid and head direction neurons providing metrics for distance and orientation.We show here that head direction cells in MEC are organized topographically.
Giocomo, Lisa M. +5 more
openaire +4 more sources
The computational neuroscience of head direction cells [PDF]
, 2011 Head direction cells signal the orientation of the head in the horizontal plane. This thesis shows how some of the known head direction cell response properties might develop through learning. The research methodology employed is the computer simulation of neural network models of head direction cells that self-organize through learning.
Walters, Daniel Matthew
openaire +3 more sources
Place cells, head direction cells, and the learning of landmark stability [PDF]
The Journal of Neuroscience, 1995 Previous studies have shown that hippocampal place fields are controlled by the salient sensory cues in the environment, in that rotation of the cues causes an equal rotation of the place fields. We trained rats to forage for food pellets in a gray cylinder with a single salient directional cue, a white card covering 90 degrees of the cylinder wall ...
J J, Knierim +2 more
openaire +3 more sources
Head direction maps remain stable despite grid map fragmentation [PDF]
Frontiers in Neural Circuits, 2012 Areas encoding space in the brain contain both representations of position (place cells and grid cells) and representations of azimuth (head direction cells).
Jonathan R Whitlock, Dori eDerdikman
doaj +2 more sources
Lesions of the head direction cell system impair direction discrimination. [PDF]
Behavioral Neuroscience, 2019 Previous results suggest that directional information from the head direction cell circuit may inform hippocampal place cell firing when an animal is confronted with visually identical environments. To investigate whether such information might also be essential for spatial behavior, we tested adult, male Lister Hooded rats that had received either ...
Anna E. Smith +4 more
openaire +6 more sources
Theta-modulated head direction cells in the rat anterior thalamus. [PDF]
J Neurosci, 2011 A major tool in understanding how the brain processes information is the analysis of neuronal output at each hierarchical level along the pathway of signal propagation. Theta rhythm and head directionality are the two main signals found across all levels of Papez's circuit, which supports episodic memory formation.
Tsanov M +6 more
europepmc +7 more sources
Slowness and sparseness lead to place, head-direction, and spatial-view cells. [PDF]
PLoS Computational Biology, 2007 We present a model for the self-organized formation of place cells, head-direction cells, and spatial-view cells in the hippocampal formation based on unsupervised learning on quasi-natural visual stimuli.
Mathias Franzius +2 more
doaj +2 more sources