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Titolo:
Background, but not foreground, spatial cues are taken as references for head direction responses by rat anterodorsal thalamus neurons
Autore:
Zugaro, MB; Berthoz, A; Wiener, SI;
Indirizzi:
Coll France, CNRS, LPPA, F-75231 Paris 05, France Coll France Paris France 05 France, CNRS, LPPA, F-75231 Paris 05, France
Titolo Testata:
JOURNAL OF NEUROSCIENCE
fascicolo: 14, volume: 21, anno: 2001,
pagine: NIL_11 - NIL_15
SICI:
0270-6474(20010715)21:14<NIL_11:BBNFSC>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
FREELY MOVING RATS; PLACE CELLS; NAVIGATION TASK; HIPPOCAMPUS; REPRESENTATION; MICE;
Keywords:
foreground; background; landmark; spatial orientation; place cells; navigation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Wiener, SI Coll France, CNRS, LPPA, 11 Pl Marcelin Berthelot, F-75231 Paris 05, France Coll France 11 Pl Marcelin Berthelot Paris France 05 5, France
Citazione:
M.B. Zugaro et al., "Background, but not foreground, spatial cues are taken as references for head direction responses by rat anterodorsal thalamus neurons", J NEUROSC, 21(14), 2001, pp. NIL_11-NIL_15

Abstract

Two populations of limbic neurons are likely neurophysiological substratesfor cognitive operations required for spatial orientation and navigation: hippocampal pyramidal cells discharge selectively when the animal is in a certain place (the "firing field") in the environment, whereas head direction cells discharge when the animal orients its head in a specific, "preferred" direction. Cressant et al. (1997) showed that the firing fields of hippocampal place cells reorient relative to a group of three-dimensional objects only if these are at the periphery, but not the center of an enclosed platform. To test for corresponding responses in head direction cells, three objects were equally spaced along the periphery of a circular platform. Preferred directions were measured before and after the group of objects was rotated. (The rat was disoriented in total darkness between sessions). This was repeated in the presence or absence of a cylinder enclosing the platform. When the enclosure was present, the preferred directions of all 30 cells recorded shifted by the same angle as the objects. In the absence of the enclosure, the preferred directions did not follow the objects, remaining fixed relative to the room. These results provide a possible neurophysiological basis for observations from psychophysical experiments in humans that background, rather than foreground, cues are preferentially used for spatial orientation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/04/20 alle ore 23:06:24