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Titolo:
An early transient 40 Hz activity discriminates a following pro-saccade from a no-move and anti-saccade choice
Autore:
Smyrnis, N; Linardatos, D; Evdokimidis, I; Constantinidis, TS; Stefanis, CN;
Indirizzi:
Natl Tech Univ Athens, Mental Hlth Res Inst, Athens, Greece Natl Tech UnivAthens Athens Greece ental Hlth Res Inst, Athens, Greece Natl Tech Univ Athens, Aeginition Hosp, Dept Neurol, Cognit & Act Grp, Athens 11528, Greece Natl Tech Univ Athens Athens Greece 11528 Act Grp, Athens 11528, Greece Natl Tech Univ Athens, Dept Informat, Div Commun & Signal Proc, Athens, Greece Natl Tech Univ Athens Athens Greece ommun & Signal Proc, Athens, Greece
Titolo Testata:
EXPERIMENTAL BRAIN RESEARCH
fascicolo: 3, volume: 139, anno: 2001,
pagine: 287 - 296
SICI:
0014-4819(200108)139:3<287:AET4HA>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSTERIOR PARIETAL CORTEX; CAT VISUAL-CORTEX; GAMMA-BAND ACTIVITY; NEURONAL OSCILLATIONS; CORTICAL POTENTIALS; EYE-MOVEMENT; HUMANS; RESPONSES; TASK; PERCEPTION;
Keywords:
gamma-band response; oscillatory EEG activity; visual discrimination; oculomotor task; GO/NOGO; anti-saccade; visuomotor transformation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Smyrnis, N Natl Tech Univ Athens, Mental Hlth Res Inst, Athens, Greece Natl Tech Univ Athens Athens Greece Res Inst, Athens, Greece
Citazione:
N. Smyrnis et al., "An early transient 40 Hz activity discriminates a following pro-saccade from a no-move and anti-saccade choice", EXP BRAIN R, 139(3), 2001, pp. 287-296

Abstract

We studied the oscillatory activity of the scalp-recorded EEG in healthy humans performing a task that required a particular eye-movement response choice according to the shape of a visual target. We observed a significant stimulus-aligned activity at the 40 Hz frequency band 100 ms after the appearance of the target only when that target was the end point for the subsequent eye movement (pro-saccade). This activity was most prominent over the central-parietal area of the right hemisphere. When the target indicated a movement to the opposite direction (anti-saccade) or indicated that no movement was required (no-move), this 40 Hz activity was nearly absent. This difference in activity between the pro-saccade and the other two tasks was evident in the single subject ERPs for four of the six subjects studied. In contrast, the movement-aligned 40 Hz activity for the pro-saccade and anti-saccade was almost identical. We speculate that this early stimulus-aligned 40 Hz activity might reflect a fast transformation of a visual stimulus to amotor response (eye movement) that can be performed for the pro-saccade task where stimulus-response compatibility is strong compared to the antisaccade and no-move tasks. The movement-aligned 40 Hz activity might be relatedto the motor response preparation per se. We conclude that this task specific transient oscillatory activity could be used as a probe in the study ofthe temporal dynamics of visuomotor transformations.

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Documento generato il 08/07/20 alle ore 00:34:33