Cognitive mechanisms and motor control during a saccadic eye movement task: evidence from quantitative electroencephalography

Arquivos de Neuro-Psiquiatria

Claudia Diniz²  Bruna Velasques²  Juliana Bittencourt²  Caroline Peressutti²  Sergio Machado¹  Silmar Teixeira²  Joana Luz Santos²  José Inácio Salles¹  Luis F. Basile¹  Renato Anghinah¹  Elie Cheniaux¹  Antonio Egidio Nardi¹  Mauricio Cagy¹  Roberto Piedade²  Oscar Arias-carrión¹  Pedro Ribeiro² 

[1] ,Federal University of Rio de Janeiro Institute of Psychiatry Rio de Janeiro RJ ,Brazil

关键词: beta coherence;    motor control;    qEEG;    saccadic eye movement;    sensorimotor integration;    visuospatial attention;    coerência beta;    controle motor;    EEGq;    movimentos oculares sacádicos;    integração sensório-motora;    atenção visuoespaciais;   

DOI  :  10.1590/S0004-282X2012000700007

来源: SciELO

【 摘 要 】

The saccadic movement is an important behavioral measure used to investigate several cognitive processes, including attention and sensorimotor integration. The present study aimed at investigating changes in beta coherence over frontal, motor, occipital, and parietal cortices during the performance of two different conditions of a prosacadic paradigm. The conditions involved a different pattern of stimulus presentation: a fixed and random stimulus presentation. Twelve healthy volunteers (three male, mean age of 26.25 (SD=4.13) performed the task, while their brain activity pattern was recorded using quantitative electroencephalography. The results showed an interaction between factors condition and moment for the pair of electrode C3/C4. We observed a main effect for moment to CZ/C4, FZ/F3, and P3/PZ. We also found a main effect for condition to FZ/F4, P3/P4, and O1/O2. Our results demonstrated an important role of the inter-connection of the two hemispheres in visual search and movement preparation. The study demonstrates an automation of action and reduction of the focus of attention during the task. We also found that the inter-hemispheric beta coherence plays an important role in the differentiation of the two conditions, and that beta in the right frontal cortex is able to differentiate the conditions, demonstrating a greater involvement of procedural memory in fixed condition. Our results suggest a neuronal specialization in the execution of prosacadic paradigm involving motor task sequence.

【 授权许可】

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