An early transient 40 Hz activity discriminates a following pro-saccade from a no-move and anti-saccade choice

Smyrnis, N; Linardatos, D; Evdokimidis, I; Constantinidis, TS; Stefanis, CN

dc.contributor.author	Smyrnis, N	en
dc.contributor.author	Linardatos, D	en
dc.contributor.author	Evdokimidis, I	en
dc.contributor.author	Constantinidis, TS	en
dc.contributor.author	Stefanis, CN	en
dc.date.accessioned	2014-03-01T01:51:01Z
dc.date.available	2014-03-01T01:51:01Z
dc.date.issued	2001	en
dc.identifier.issn	0014-4819	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26221
dc.subject	gamma-band response	en
dc.subject	oscillatory EEG activity	en
dc.subject	visual discrimination	en
dc.subject	oculomotor task	en
dc.subject	GO/NOGO	en
dc.subject	anti-saccade	en
dc.subject	visuomotor transformation	en
dc.subject.classification	Neurosciences	en
dc.subject.other	POSTERIOR PARIETAL CORTEX	en
dc.subject.other	CAT VISUAL-CORTEX	en
dc.subject.other	GAMMA-BAND ACTIVITY	en
dc.subject.other	NEURONAL OSCILLATIONS	en
dc.subject.other	CORTICAL POTENTIALS	en
dc.subject.other	EYE-MOVEMENT	en
dc.subject.other	HUMANS	en
dc.subject.other	RESPONSES	en
dc.subject.other	TASK	en
dc.subject.other	PERCEPTION	en
dc.title	An early transient 40 Hz activity discriminates a following pro-saccade from a no-move and anti-saccade choice	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2001	en
heal.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 a motor 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 related to the motor response preparation per se. We conclude that this task specific transient oscillatory activity could be used as a probe in the study of the temporal dynamics of visuomotor transformations.	en
heal.publisher	SPRINGER-VERLAG	en
heal.journalName	EXPERIMENTAL BRAIN RESEARCH	en
dc.identifier.isi	ISI:000170347300004	en
dc.identifier.volume	139	en
dc.identifier.issue	3	en
dc.identifier.spage	287	en
dc.identifier.epage	296	en