Alpha event-related desynchronization preceding a go/no-go task: a high-resolution EEG study.
The authors delineated the time evolution of alpha event-related desynchronization over human frontal, parietal, and primary sensorimotor areas during the expectancy of a go/no-go task. The main issue under investigation was whether anticipatory processes impinged upon cortical areas in sequential or parallel mode. Compared with the control condition, in the experimental condition there was an Alpha 1 desynchronization over the central midline, an Alpha 2 desynchronization increasing over primary sensorimotor areas, and an Alpha 3 desynchronization increasing in parallel over bilateral primary sensorimotor areas. These processes had different temporal features. Results disclose an anticipatory activity of central midline areas and primary sensorimotor areas in both parallel and sequential modes. This reflects an adaptive, energy-consuming strategy rather than an economic waiting for the go stimulus.
Babiloni
Claudio
C
Dipartimento di Fisiologia Umana e Farmacologia, Università degli Studi di Roma "La Sapienza', Rome, Italy. Claudio.Babiloni@uniromal.it.
Brancucci
Alfredo
A
Arendt-Nielsen
Lars
L
Babiloni
Fabio
F
Capotosto
Paolo
P
Carducci
Filippo
F
Cincotti
Febo
F
Romano
Lara
L
Chen
Andrew C N
AC
Rossini
Paolo Maria
PM
D000328:Adult; D000513:Alpha Rhythm / Q000145:classification / Q000379:methods*; D000704:Analysis of Variance; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000033:anatomy & histology / Q000502:physiology*; D003657:Decision Making / Q000502:physiology*; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D010775:Photic Stimulation / Q000379:methods; D013057:Spectrum Analysis / Q000379:methods; D013997:Time Factors