Alpha reduction and event-related potentials, theta and gamma increase linked to letter selection

被引：4

作者：

Digiacomo, Marcia R. ^{[1
]}

Gomez, Carlos M. ^{[1
]}

Flores, Angelica B. ^{[1
]}

机构：

[1] Univ Seville, Dept Expt Psychol, E-41009 Seville, Spain

来源：

NEUROREPORT | 2007年 / 18卷 / 08期

关键词：

alpha reduction; electroencephalograph; event-related potential; gamma oscillations; induced; theta oscillations; visual attention;

D O I：

10.1097/WNR.0b013e3280c1e370

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

We examined evoked and induced modulations in theta, alpha and gamma oscillations, and also the P2 and late positive component of event-related potentials, during a visual discrimination task with target and nontarget letters. Results for target letters showed a decrease in the amplitude of alpha-band (10-11 Hz) activity and an increase in theta (4-7 Hz) and gamma (40-44 Hz) activities around 350 ms after stimulation. P2 and late positive component presented a higher amplitude to target than to repeated nontarget letters. Alpha reduction was inversely related to theta and late positive component increase. Moreover, gamma oscillation amplitude was directly related to theta amplitude. The findings suggest the importance of occipitoparietal alpha reduction for the development of task-related neuronal activity.

引用

页码：729 / 733

页数：5

共 25 条

[11] Location of brain rhythms and their modulation by preparatory attention estimated by current density [J].

Gomez, C. M. ;

Marco-Pallares, J. ;

Grau, C. .

BRAIN RESEARCH, 2006, 1107 :151-160

[12]

Gómez CM, 2004, ACTA NEUROBIOL EXP, V64, P143, DOI 10.55782/ane-2004-1500

[13]

Gomez Gonzalez Carlos M., 1994, Brain Topography, V7, P41

[14] Modulation of oscillatory brain activity and evoked potentials in a repetition priming task in the human EEG [J].

Gruber, T ;

Malinowski, P ;

Müller, MM .

EUROPEAN JOURNAL OF NEUROSCIENCE, 2004, 19 (04) :1073-1082

[15] Effects of picture repetition on induced gamma band responses, evoked potentials, and phase synchrony in the human EEG [J].

Gruber, T ;

Müller, MM .

COGNITIVE BRAIN RESEARCH, 2002, 13 (03) :377-392

[16] Visual discrimination performance is related to decreased alpha amplitude but increased phase locking [J].

Hanslmayr, S ;

Klimesch, W ;

Sauseng, RFI ;

Gruber, W ;

Doppelmayr, M ;

Freunberger, R ;

Pecherstorfer, T .

NEUROSCIENCE LETTERS, 2005, 375 (01) :64-68

[17]

Kaufman L, 1990, J Cogn Neurosci, V2, P124, DOI 10.1162/jocn.1990.2.2.124

[18] EEG alpha and theta oscillations reflect cognitive and memory performance: a review and analysis [J].

Klimesch, W .

BRAIN RESEARCH REVIEWS, 1999, 29 (2-3) :169-195

[19]

KLIMESCH W, 2006, IN PRESS BRAIN RES B

[20] On the time resolution of event-related desynchronization:: a simulation study [J].

Knösche, TR ;

Bastiaansen, MCM .

CLINICAL NEUROPHYSIOLOGY, 2002, 113 (05) :754-763

← 1 2 3 →