Non-rhythmic head-direction cells in the parahippocampal region are not constrained by attractor network dynamics
Computational models postulate that head-direction (HD) cells are part of an attractor network integrating head turns. This network requires inputs from visual landmarks to anchor the HD signal to the external world. We investigated whether information about HD and visual landmarks is integrated in...
Gespeichert in:
| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
17 September 2018
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| In: |
eLife
Year: 2018, Jahrgang: 7 |
| ISSN: | 2050-084X |
| DOI: | 10.7554/eLife.35949 |
| Online-Zugang: | Resolving-System, Volltext: https://doi.org/10.7554/eLife.35949 Verlag: https://elifesciences.org/articles/35949 
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| Verfasserangaben: | Olga Kornienko, Patrick Latuske, Mathis Bassler, Laura Kohler, Kevin Allen |
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| 520 | |a Computational models postulate that head-direction (HD) cells are part of an attractor network integrating head turns. This network requires inputs from visual landmarks to anchor the HD signal to the external world. We investigated whether information about HD and visual landmarks is integrated in the medial entorhinal cortex and parasubiculum, resulting in neurons expressing a conjunctive code for HD and visual landmarks. We found that parahippocampal HD cells could be divided into two classes based on their theta-rhythmic activity: non-rhythmic and theta-rhythmic HD cells. Manipulations of the visual landmarks caused tuning curve alterations in most HD cells, with the largest visually driven changes observed in non-rhythmic HD cells. Importantly, the tuning modifications of non-rhythmic HD cells were often non-coherent across cells, refuting the notion that attractor-like dynamics control non-rhythmic HD cells. These findings reveal a new population of non-rhythmic HD cells whose malleable organization is controlled by visual landmarks. | ||
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