Rapid Spatial Reorientation and Head Direction Cells
| Autor: | Sidney I. Wiener, Michaël B. Zugaro, Angelo Arleo, Alain Berthoz |
|---|---|
| Přispěvatelé: | Laboratoire de Physiologie de la Perception et de l'Action (LPPA), Collège de France (CdF (institution))-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2003 |
| Předmět: |
Male
Head (linguistics) Posture Action Potentials Hippocampus 03 medical and health sciences 0302 clinical medicine Orientation Compass Attractor Reaction Time Animals Premovement neuronal activity Rats Long-Evans Head direction cells ARTICLE Sensory cue 030304 developmental biology Neurons Physics 0303 health sciences Communication business.industry [SCCO.NEUR]Cognitive science/Neuroscience General Neuroscience Electrodes Implanted Rats Cell system Anterior Thalamic Nuclei Head Movements business Head Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | Journal of Neuroscience Journal of Neuroscience, Society for Neuroscience, 2003, 23 (8), pp.3478-82. ⟨10.1523/JNEUROSCI.23-08-03478.2003⟩ |
| ISSN: | 1529-2401 0270-6474 |
| DOI: | 10.1523/jneurosci.23-08-03478.2003 |
| Popis: | International audience; It is surprising how quickly we can find our bearings when suddenly confronted with a familiar environment, for instance when the lights are turned on in a dark room. Subjectively, this appears to occur almost instantaneously, yet the neural processes permitting this rapid reorientation are unknown. A likely candidate is the head direction (HD) cell system. These limbic neurons found in several brain regions, including the thalamus and the hippocampus, discharge selectively when the head of an animal is oriented in a particular ("preferred") direction. This neuronal activity is independent of position and ongoing behavior and is thus likely to constitute a physiological basis for the sense of direction. Remarkably, although the HD cell system has properties resembling those of a compass, it is independent of geomagnetic fields. Rather, the preferred directions of the HD cells are strongly anchored to visual cues in the environment. Here, we bring evidence for the first time that a fundamental component of the capacity to rapidly reorient in a familiar environment may be brought about by updating of HD cell responses as rapidly as 80 msec after changes in the visual scene. Continuous attractor networks have been used successfully to model HD cell ensemble dynamics. The present results suggest that after large rotations of the surrounding landmarks, activity in such networks may be propagated in abrupt jumps rather than in a gradually progressive manner. |
| Databáze: | OpenAIRE |
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