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Titolo:
The oculomotor gap effect without a foveal fixation point
Autore:
Fendrich, R; Demirel, S; Danziger, S;
Indirizzi:
Dartmouth Coll, Program Cognit Neurosci, Hanover, NH 03755 USA Dartmouth Coll Hanover NH USA 03755 ognit Neurosci, Hanover, NH 03755 USA Indiana Univ, Sch Optometry, Bloomington, IN USA Indiana Univ BloomingtonIN USA Univ, Sch Optometry, Bloomington, IN USA Univ Wales, Sch Psychol, Bangor, Gwynedd, Wales Univ Wales Bangor GwyneddWales les, Sch Psychol, Bangor, Gwynedd, Wales
Titolo Testata:
VISION RESEARCH
fascicolo: 4, volume: 39, anno: 1999,
pagine: 833 - 841
SICI:
0042-6989(199902)39:4<833:TOGEWA>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
MONKEY SUPERIOR COLLICULUS; SACCADIC EYE-MOVEMENTS; HUMAN EXPRESS SACCADES; SHORT REACTION-TIMES; VISUAL-ATTENTION; WARNING SIGNALS; RHESUS-MONKEY; LATENCY; DISENGAGEMENT; OFFSETS;
Keywords:
fixation cells; gap effect; saccadic reaction times; superior colliculus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Fendrich, R Dartmouth5Coll, Program Cognit Neurosci, 6162 Silsby Hall, Hanover, NH 0375 Dartmouth Coll 6162 Silsby Hall Hanover NH USA 03755 , NH 0375
Citazione:
R. Fendrich et al., "The oculomotor gap effect without a foveal fixation point", VISION RES, 39(4), 1999, pp. 833-841

Abstract

Turning off a fixation point prior to or coincident with the appearance ofa visual target reduces the latency of saccades to that target. We investigated this 'gap effect' when subjects fixated a central point or the centerof a square formed by four points that were 4, 2 or 1 degrees eccentric from the square's center. The fixation anchor vanished 200 ms prior to the appearance of a saccadic target in a Gap condition, coincident with the target's appearance in a 0-Gap condition, or remained on in an Overlap condition. Saccadic reaction time was reduced in the Gap relative to 0-Gap conditionirrespective of the type of fixation anchor. However, saccadic reaction time was not reduced in the 0-Gap relative to Overlap condition when the points forming the square had eccentricities of 2 or 4 degrees. Results are interpreted in terms of a partial mediation of the gap effect by fixation cells in the rostral pole of the superior colliculus. (C) 1998 Elsevier ScienceLtd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 20:57:52