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Titolo:
Role of basal ganglia and ectostriatum in the context-dependent propertiesof the optocollic reflex (OCR) in the pigeon (Columba livia): a lesion study
Autore:
Gioanni, H; Sansonetti, A;
Indirizzi:
Lab Neurobiol Reseaux Sensorimoteurs, ESA 7060, F-75270 Paris 06, France Lab Neurobiol Reseaux Sensorimoteurs Paris France 06 70 Paris 06, France Univ Paris 06, IDN, Lab Neurochimanat, F-75005 Paris, France Univ Paris 06 Paris France F-75005 Neurochimanat, F-75005 Paris, France
Titolo Testata:
EUROPEAN JOURNAL OF NEUROSCIENCE
fascicolo: 3, volume: 12, anno: 2000,
pagine: 1055 - 1070
SICI:
0953-816X(200003)12:3<1055:ROBGAE>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACCESSORY OPTIC-SYSTEM; NUCLEUS LENTIFORMIS MESENCEPHALI; BIOTINYLATED DEXTRAN-AMINE; RECEPTIVE-FIELD PROPERTIES; STABILIZING GAZE REFLEXES; LATERAL SPIRIFORM NUCLEUS; SACCADIC EYE-MOVEMENTS; OPTOKINETIC NYSTAGMUS; PATTERN-DISCRIMINATION; HORSERADISH-PEROXIDASE;
Keywords:
birds; fast phases; flight; nucleus spiriformis lateralis (SpL); optokinetic responses (OKR);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
91
Recensione:
Indirizzi per estratti:
Indirizzo: Gioanni, H Lab Neurobiol Reseaux Sensorimoteurs, ESA 7060, 45 Rue Saints-Peres, F-75270 Paris 06, France Lab Neurobiol Reseaux Sensorimoteurs 45 Rue Saints-Peres Paris France 06
Citazione:
H. Gioanni e A. Sansonetti, "Role of basal ganglia and ectostriatum in the context-dependent propertiesof the optocollic reflex (OCR) in the pigeon (Columba livia): a lesion study", EUR J NEURO, 12(3), 2000, pp. 1055-1070

Abstract

The possible participation of basal ganglia and associated structures [dorsal striato-pallidum, nucleus spiriformis lateralis (SpL), ectostriatum] inthe elaboration of the optocollic reflex (OCR) was investigated by making bilateral chemical lesions (ibotenic acid). Previous data have shown that both the slow and fast phases of the OCR are dependent on the behavioural context. The slow phase velocity (SPV) and the peak velocity of fast phases obtained in non-flying pigeons ('resting condition') were enhanced in pigeons in which a flying posture was experimentally provoked ('flying condition'). Therefore, the effect of lesions was analysed in pigeons standing in the'resting' or 'flying' condition. In the 'resting' as in the 'flying' condition, all the lesions provoked a decrease in SPV, which augmented with the stimulation velocity. Velocity step stimuli revealed greater OCR deficits than velocity ramp stimuli. Extensive lesions (including the striato-pallidum, ectostriatum and a part of the neostriatum), as well as SpL lesions, provoked a greater SPV decrease over a longer time than lesions restricted to the striato-pallidum or the ectostriatum. The peak velocity of fast phases was only reduced by the 'extensive lesion' in the 'flying condition'. The present data show that the basal ganglia system is involved in the elaboration of optokinetic responses and suggest that, to work in an optimal range, the optokinetic centres need to receive integrated information from basal ganglia in addition to direct visual input.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 21:49:02