Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Express averaging saccades in monkeys
Autore:
Chou, IH; Sommer, MA; Schiller, PH;
Indirizzi:
MIT, Dept Brain & Cognit Sci, Cambridge, MA 02139 USA MIT Cambridge MA USA 02139 pt Brain & Cognit Sci, Cambridge, MA 02139 USA
Titolo Testata:
VISION RESEARCH
fascicolo: 25, volume: 39, anno: 1999,
pagine: 4200 - 4216
SICI:
0042-6989(1999)39:25<4200:EASIM>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
FRONTAL EYE FIELD; SHORT REACTION-TIMES; NON-TARGET STIMULI; SUPERIOR COLLICULUS; RHESUS-MONKEY; VISUAL-ATTENTION; MOVEMENTS; LATENCY; FIXATION; DISCRIMINATION;
Keywords:
monkey; express saccade; averaging saccade; reaction time; saccadic eye movement;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Chou, IH Univ Calif San Francisco, Dept Physiol, 513 Parnassus,Box 0444, San Francisco, CA 94143 USA Univ Calif San Francisco 513 Parnassus,Box 0444 San Francisco CA USA 94143
Citazione:
I.H. Chou et al., "Express averaging saccades in monkeys", VISION RES, 39(25), 1999, pp. 4200-4216

Abstract

When monkeys are presented simultaneously with multiple stimuli, they can make one of two types of response. Either they make averaging saccades, that land at intermediate locations between the targets, or target-directed saccades, that land close to one of the targets. The two types of saccades occur at different latencies and are thought to reflect different processes; fast reflexive averaging and slower target selection. We investigated the latency of averaging saccades in five monkeys, with particular emphasis on 'express' latency saccades. which are thought to be inhibited by target selection. Express averaging saccades were made prolifically by the two monkeysthat made both express and regular latency saccades, but only when no specific instruction was given regarding the saccade target. When these monkeyshad to choose one of the targets, on the basis of its color, they still made averaging saccades. However, the endpoints formed two distributions close to the targets as opposed to one single distribution centered between thetargets, as was the case when targets were identical; also, express saccades were almost entirely absent. We conclude that express averaging saccadesare a form of spatial and temporal optimization of gaze shifting. (C) 1999Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 02:49:27