Distraction affects frontal alpha rhythms related to expectancy of pain: An EEG study

被引:43
|
作者
Del Percio, Claudio
Le Pera, Domenica
Arendt-Nielsen, Lars
Babiloni, Claudio
Brancucci, Alfredo
Chen, Andrew C. N.
De Armas, Liala
Miliucci, Roberto
Restuccia, Domenico
Valeriani, Massimiliano
Rossini, Paolo Maria
机构
[1] Univ Roma La Sapienza, Dipartimento Fisiol Umana & Farmacol, I-00185 Rome, Italy
[2] Aalborg Univ, Human Brain Mapping & Cort Imaging Lab, SMI, Aalborg, Denmark
[3] Osped Fatebenefratelli Isola Tiberina, AFaR, Dip Neurosci, Rome, Italy
[4] Ist Med & Sci Sport, CONI Serv, Rome, Italy
[5] Tosinvest Sanita, Casa Cura San Raffaele Pisana, Rome, Italy
[6] Capital Univ Med Sci, Ctr Funct Human Brain Mapping, Beijing, Peoples R China
[7] Univ Cattolica Sacro Cuore, Dipartimento Neurol, Rome, Italy
[8] Osped Pediat Bambino Gesu, IRCCS, Div Neurol, Rome, Italy
[9] IRCCS S Giovanni di Dio FBF, Rome, Italy
关键词
electroencephalography (EEG); alpha rhythms; event-related desynchronization/synchronization (ERD/ERS); pain; sensorimotor interactions; cognition; distraction;
D O I
10.1016/j.neuroimage.2006.01.013
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Previous electroencephalographic (EEG) evidence has shown event-related desynchronization (ERD) of alpha rhythms before predictable painful stimuli, as a possible neural concomitant of attentional preparatory processes (Babiloni, C., Brancucci, A., Babiloni, F., Capotosto, P., Carducci, F., Cincotti, F., Arendt-Nielsen, L., Chen, A.C., Rossini, P.M., 2003. Anticipatory cortical responses during the expectancy of a predictable painful stimulation. A high-resolution electroencephalography study. Eur. J. Neurosci. 18 (6) 1692-700). This study tested the hypothesis that alpha ERD before predictable painful stimuli is reduced as an effect of distraction. A visual warning stimulus preceded a laser painful stimulation, which was strictly followed by visual imperative stimuli. In the Pain (control) condition, no task was required after the imperative stimuli. In the Pain + Movement condition, subjects had to perform a movement of the right index finger. In the Pain + Cognition condition, they had to mentally perform an arithmetical task. EEG data were recorded in 10 subjects from 30 electrodes. Artifact-free recordings were spatially enhanced by surface Laplacian transformation. Alpha ERD was computed at three alpha sub-bands according to subjects' individual alpha frequency peak (i.e., about 6-8 Hz, 8-10 Hz, 10-12 Hz). Compared to the control condition, the subjects reported a significantly lower stimulus intensity perception and unpleasantness in the Pain + Movement and Pain + Cognition conditions. In addition, there was a cancellation of the alpha 3 ERD (i.e., about 10-12 Hz) in Pain + Cognition condition and even a generation of a statistically significant alpha 3 ERS in Pain + Movement condition. These effects were maximum over fronto-central midline. These results suggest that distraction during the expectancy of pain is related to a reduced neural desynchronization of fronto-central midline alpha rhythms (i.e., reduced cortical activation) towards an overt hyper-synchronization (cortical idling). (c) 2006 Elsevier Inc. All rights reserved.
引用
收藏
页码:1268 / 1277
页数:10
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