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Titolo:
Integration of multiple-whisker inputs in rat somatosensory cortex
Autore:
Mirabella, G; Battiston, S; Diamond, ME;
Indirizzi:
Int Sch Adv Studies, Cognit Neurosci Sector, I-34013 Trieste, Italy Int Sch Adv Studies Trieste Italy I-34013 Sector, I-34013 Trieste, Italy Univ Udine, Dept Biomed Sci & Technol, I-33100 Udine, Italy Univ Udine Udine Italy I-33100 iomed Sci & Technol, I-33100 Udine, Italy
Titolo Testata:
CEREBRAL CORTEX
fascicolo: 2, volume: 11, anno: 2001,
pagine: 164 - 170
SICI:
1047-3211(200102)11:2<164:IOMIIR>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORTICAL RECEPTIVE-FIELDS; BARREL CORTEX; ANTEROGRADE TRACER; POINT STIMULI; ALERT MONKEYS; ALBINO-RAT; ORGANIZATION; VIBRISSA; NEOCORTEX; THALAMUS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Diamond, ME Int Sch Adv Studies, Cognit Neurosci Sector, Via Beirut 9, I-34013 Trieste, Italy Int Sch Adv Studies Via Beirut 9 Trieste Italy I-34013 Italy
Citazione:
G. Mirabella et al., "Integration of multiple-whisker inputs in rat somatosensory cortex", CEREB CORT, 11(2), 2001, pp. 164-170

Abstract

Rats explore their surroundings through rhythmic movement of their mystacial vibrissae. At any given moment, multiple whiskers are simultaneously moved and may contact the surface of an object. The aim of this work is to understand how simultaneous multiple-whisker deflections are processed in the somatosensory cortex. Arrays of 25 electrodes were inserted into the vibrissal representation of barrel cortex of adult rats. Multi unit responses were recorded during (i) stimulation of Single whiskers, and (ii) simultaneousstimulation of two, three or four whiskers of a whisker are or whisker row. The whole-array response elicited by the simultaneous stimulation of multiple-whiskers (observed response) was compared to a multiple-whisker response predictor, defined as the sum of the whole-array responses to the separate stimulation of the corresponding single whiskers. The observed response to stimulation of four whiskers was nearly always less than the predicted response, indicating a sublinear summation of multiple coincident inputs. Examining the poststimulus time course of sublinearity, we found that the earliest cortical response to whisker deflection - reflecting the thalamocortical volley - was linear, whereas the successive cortical response was highly sublinear. This suggests a cortical origin of the phenomenon.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 07:19:26