scholarly journals Head-direction cells recorded from the postsubiculum in freely moving rats. II. Effects of environmental manipulations

1990 ◽  
Vol 10 (2) ◽  
pp. 436-447 ◽  
Author(s):  
JS Taube ◽  
RU Muller ◽  
JB Ranck
Keyword(s):  
Head Direction ◽  
Head Direction Cells ◽  
Freely Moving Rats ◽  
Freely Moving

scholarly journals Nucleus reuniens of the thalamus contains head direction cells

eLife ◽  
2014 ◽  
Vol 3 ◽  
Author(s):  
Maciej M Jankowski ◽  
Md Nurul Islam ◽  
Nicholas F Wright ◽  
Seralynne D Vann ◽  
Jonathan T Erichsen ◽  
...  
Keyword(s):  
Spatial Processing ◽  
Brain Cells ◽  
Head Direction ◽  
Head Direction Cells ◽  
Nucleus Reuniens ◽  
Connected Network ◽  
Heading Direction ◽  
Freely Moving ◽  
First Time ◽  
Discrete Populations

Discrete populations of brain cells signal heading direction, rather like a compass. These ‘head direction’ cells are largely confined to a closely-connected network of sites. We describe, for the first time, a population of head direction cells in nucleus reuniens of the thalamus in the freely-moving rat. This novel subcortical head direction signal potentially modulates the hippocampal CA fields directly and, thus, informs spatial processing and memory.

scholarly journals Head-direction cells escaping attractor dynamics in the parahippocampal region

2018 ◽  
Author(s):  
Olga Kornienko ◽  
Patrick Latuske ◽  
Laura Kohler ◽  
Kevin Allen
Keyword(s):  
Entorhinal Cortex ◽  
Computational Models ◽  
Head Direction ◽  
Grid Cells ◽  
Visual Landmarks ◽  
Head Direction Cells ◽  
Medial Entorhinal Cortex ◽  
Attractor Dynamics ◽  
Freely Moving ◽  
Uniform Population

AbstractNavigation depends on the activity of head-direction (HD) cells. Computational models postulate that HD cells form a uniform population that reacts coherently to changes in landmarks. We tested whether this applied to HD cells of the medial entorhinal cortex and parasubiculum, areas where the HD signal contributes to the periodic firing of grid cells. Manipulations of the visual landmarks surrounding freely-moving mice altered the tuning of HD cells. Importantly, these tuning modifications were often non-coherent across cells, refuting the notion that HD cells form a uniform population constrained by attractor-like dynamics. Instead, examination of theta rhythmicity 1revealed two types of HD cells, theta rhythmic and non-rhythmic cells. Larger tuning alterations were observed predominantly in non-rhythmic HD cells. Moreover, only non-rhythmic HD cells reorganized their firing associations in response to visual land-mark changes. These findings reveal a theta non-rhythmic HD signal whose malleable organization is controlled by visual landmarks.

B-PO04-015 AN OBJECTIVE TOOL TO QUANTIFY ATRIAL FIBRILLATION SUBSTRATE IN FREELY MOVING RATS

Heart Rhythm ◽  
2021 ◽  
Vol 18 (8) ◽  
pp. S286
Author(s):  
Michael Murninkas ◽  
Roni Gillis ◽  
Sigal Elyagon ◽  
Wesam Mulla ◽  
Gideon Gradwohl ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Freely Moving Rats ◽  
Freely Moving ◽  
Objective Tool
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