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Titolo:
Effects of attention on pattern-reversal visual evoked potentials: Foveal field stimulation versus peripheral field stimulation
Autore:
Hoshiyama, M; Kakigi, R;
Indirizzi:
Natl Inst Physiol Sci, Dept Integrat Physiol, Okazaki, Aichi 4448585, Japan Natl Inst Physiol Sci Okazaki Aichi Japan 4448585 i, Aichi 4448585, Japan
Titolo Testata:
BRAIN TOPOGRAPHY
fascicolo: 4, volume: 13, anno: 2001,
pagine: 293 - 298
SICI:
0896-0267(200122)13:4<293:EOAOPV>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; BILATERAL STIMULUS ARRAYS; INDEX FOCUSED ATTENTION; SELECTIVE ATTENTION; CORTEX; COMPONENTS; MODULATION; HUMANS; VEP;
Keywords:
VEP; attention; concentration; reaction task; visual field; human;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Hoshiyama, M Natl Inst Physiol Sci, Dept Integrat Physiol, Okazaki, Aichi 4448585, Japan Natl Inst Physiol Sci Okazaki Aichi Japan 4448585 585, Japan
Citazione:
M. Hoshiyama e R. Kakigi, "Effects of attention on pattern-reversal visual evoked potentials: Foveal field stimulation versus peripheral field stimulation", BRAIN TOPOG, 13(4), 2001, pp. 293-298

Abstract

The effects of foveal field attention on pattern reversal visual evoked potential (VEP) were investigated in thirteen normal subjects. Conventional monocular VEP was recorded during the three conditions of control, foveal concentration. and reaction time task. Three patterns of checkerboard, which were full field (radius, 0-9 degrees), peripheral field (2.5-9 degrees) andfoveal field (0-2.5 degrees), were presented for the stimulation in each condition. The P100 and N145 amplitude of the peripheral field VEP were significantly smaller during the concentration and the reaction time task conditions than that in the control session, while the foveal field VEP amplitudes were enhanced in the concentration and reaction time tasks conditions. The full field VEP amplitudes were not significantly changed by the conditions. We concluded that the act of concentration to the foveal field or the task requiring attention to the foveal field, enhanced the VEP response to foveal field stimulation and suppressed the VEP to the peripheral field, A gating effect in area V1 was speculated, although extra-striate cortex mightcontribute.

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Documento generato il 07/07/20 alle ore 12:29:27