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Titolo:
FIXATION POINT OFFSETS FACILITATE ENDOGENOUS SACCADES
Autore:
ABRAMS RA; OONK HM; PRATT J;
Indirizzi:
WASHINGTON UNIV,DEPT PSYCHOL ST LOUIS MO 63110
Titolo Testata:
Perception & psychophysics
fascicolo: 2, volume: 60, anno: 1998,
pagine: 201 - 208
SICI:
0031-5117(1998)60:2<201:FPOFES>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN EXPRESS SACCADES; SUPERIOR COLLICULUS; VISUAL-ATTENTION; WARNING SIGNALS; EYE-MOVEMENTS; LATENCY; INHIBITION; TARGETS; LESIONS; RETURN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
R.A. Abrams et al., "FIXATION POINT OFFSETS FACILITATE ENDOGENOUS SACCADES", Perception & psychophysics, 60(2), 1998, pp. 201-208

Abstract

Subjects produced saccades to continuously visible targets that were signaled by the pitch, not the location, of an auditory signal. Such endogenous saccades were initiated more quickly when the visual fixation point disappeared 200 msec before the signal (thus producing a ''gap''), even though the alerting benefits of such a warning were eliminated by an earlier warning tone. The presence of the gap effect under these circumstances shows that the effect is more general than was previously believed: Visual fixation point offsets facilitate saccades by affecting oculomotor processes related to both visually elicited (exogenous) and centrally produced (endogenous) saccades. In addition, the magnitude of the gap effect for endogenous saccades was significantly smaller than that for exogenous saccades, suggesting that at least someof the effect arises in relatively early processes, such as those involved in the processing of sensory signals, and not exclusively in later processes, such as those involved in the preparation and productionof saccades.

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Documento generato il 03/07/20 alle ore 22:51:41