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Titolo:
Neural correlates for angular head velocity in the rat dorsal tegmental nucleus
Autore:
Bassett, JP; Taube, JS;
Indirizzi:
Dartmouth Coll, Dept Psychol & Brain Sci, Ctr Cognit Neurosci, Hanover, NH03755 USA Dartmouth Coll Hanover NH USA 03755 Cognit Neurosci, Hanover, NH03755 USA
Titolo Testata:
JOURNAL OF NEUROSCIENCE
fascicolo: 15, volume: 21, anno: 2001,
pagine: 5740 - 5751
SICI:
0270-6474(20010801)21:15<5740:NCFAHV>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
FREELY-MOVING RATS; LATERAL MAMMILLARY NUCLEUS; DIRECTION CELL-ACTIVITY; SQUIRREL-MONKEY; INTERPEDUNCULAR NUCLEUS; VESTIBULOOCULAR REFLEX; PREPOSITUS-HYPOGLOSSI; ANTERIOR THALAMUS; VESTIBULAR NUCLEI; FIRING PROPERTIES;
Keywords:
dorsal tegmental nucleus of Gudden; lateral mammillary nuclei; head direction cell; angular head velocity; nucleus prepositus hypoglossi; directional heading; neural integration; vestibular system; navigation; spatial orientation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
54
Recensione:
Indirizzi per estratti:
Indirizzo: Taube, JS Dartmouth Coll, Dept Psychol & Brain Sci, Ctr Cognit Neurosci, 6207 Moore Hall, Hanover, NH 03755 USA Dartmouth Coll 6207 Moore Hall Hanover NH USA 03755 NH 03755 USA
Citazione:
J.P. Bassett e J.S. Taube, "Neural correlates for angular head velocity in the rat dorsal tegmental nucleus", J NEUROSC, 21(15), 2001, pp. 5740-5751

Abstract

Many neurons in the rat lateral mammillary nuclei (LMN) fire selectively in relation to the animal's head direction (HD) in the horizontal plane independent of the rat's location or behavior. One hypothesis of how this representation is generated and updated is via subcortical projections from the dorsal tegmental nucleus (DTN). Here we report the type of activity in DTN neurons. The majority of cells (75%) fired as a function of the rat's angular head velocity (AHV). Cells exhibited one of two types of firing patterns: (1) symmetric, in which the firing rate was positively correlated with AHV during head turns in both directions, and (2) asymmetric, in which the firing rate was positively correlated with head turns in one direction and correlated either negatively or not at all in the opposite direction. In addition to modulation by AHV, some of the AHV cells (40.1%) were weakly modulated by the rat's linear velocity, and a smaller number were modulated by HD(11%) or head pitch (15.9%). Autocorrelation analyses indicated that with the head stationary, AHV cells displayed irregular discharge patterns. Because afferents from the DTN are the major source of information projecting to the LMN, these results suggest that AHV information from the DTN plays a significant role in generating the HD signal in LMN. A model is proposed showing how DTN AHV cells can generate and update the LMN HD cell signal.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 09:05:06