Sub-second "temporal attention" modulates alpha rhythms. A high-resolution EEG study.

Claudio Babiloni; Carlo Miniussi; Fabio Babiloni; Filippo Carducci; Febo Cincotti; Claudio Del Percio; Giulia Sirello; Claudia Fracassi; Anna C Nobre; Paolo Maria Rossini

doi:10.1016/j.cogbrainres.2003.12.010

PubMed · 15062863

Sub-second "temporal attention" modulates alpha rhythms. A high-resolution EEG study.

Claudio Babiloni·Carlo Miniussi·Fabio Babiloni·Filippo Carducci·Febo Cincotti·Claudio Del Percio·Giulia Sirello·Claudia Fracassi·Anna C Nobre·Paolo Maria Rossini

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Abstract

In the present high-resolution electroencephalographic (EEG) study, event-related desynchronization/synchronization (ERD/ERS) of alpha rhythms was computed during an S1-S2 paradigm, in which a visual cue (S1) predicted a SHORT (600 ms) or LONG (1400 ms) foreperiod, preceding a visual go stimulus (S2) triggering right or left finger movement. Could orienting attention to a selective point in time influence the alpha rhythms as a function of the SHORT vs. LONG foreperiod? Stronger selective attentional modulations were predicted for the SHORT than LONG condition. EEG data from 54 channels were "depurated" from phase-locked visual evoked potentials and spatially enhanced by surface Laplacian estimation (i.e., final data analysis was conducted on 16 subjects having a sufficient number of artifact-free EEG single trials). Low-band alpha rhythms (about 6-10 Hz) were supposed to be related to anticipatory attentional processes, whereas high-band alpha rhythms (10-12 Hz) would indicate task-specific visuo-motor processes. Compared to the LONG condition (foreperiod), the SHORT condition induced a quicker and stronger ERS at low-band alpha rhythm (about 6-8 Hz) over midline and bilateral prefrontal, sensorimotor, and posterior parietal areas. In contrast, the concomitant high-band alpha (about 10-12 Hz) ERD/ERS showed no significant difference between the two conditions. In conclusion, temporal attention for a sub-second delay (800 ms) did modulate low-band alpha rhythm over large regions of both cortical hemispheres.

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Adolescent Adult Alpha Rhythm Analysis of Variance Attention Electroencephalography Female Humans Male Photic Stimulation Time Factors Journal Article Research Support, Non-U.S. Gov't

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Claudio Babiloni, Carlo Miniussi, Fabio Babiloni, Filippo Carducci, Febo Cincotti, Claudio Del Percio, Giulia Sirello, Claudia Fracassi, Anna C Nobre, Paolo Maria Rossini. 2004. Sub-second "temporal attention" modulates alpha rhythms. A high-resolution EEG study.. https://doi.org/10.1016/j.cogbrainres.2003.12.010

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