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Electrocortical Activity Differences Related to Saccadic Movements between Bipolar Patients and Healthy Subjects

Neuroscience & Medicine 2013年第2期4卷 63-70页

作者： Washington Adolfo Batista Juliana Bittencourt jose Inácio Salles Silmar Teixeira Luis F.Basile Antonio Egidio Nardi Claudia diniz Fernanda Novis Luciana Angélica Silveira Rafael de Assis da Silva Amanda de Lima Teixeira Elie Cheniaux Flávio Kapczinki Mauricio Cagy Roberto Piedade Bruna Velasques Pedro Ribeiro Brain Mapping and Sensory Motor Integration Institute of Psychiatry of the Federal University of Rio de Janeiro(IPUB/UFRJ)Rio de JaneiroBrazil Neurophysiology and Neuropsychology of Attention Institute of Psychiatry of the Federal University of Rio de Janeiro(IPUB/UFRJ)Rio de JaneiroBrazil Institute of Applied Neuroscience(INA) Rio de JaneiroBrazil School of Physical Education Bioscience Department(EEFD/UFRJ)Rio de JaneiroBrazil Federal Confederation of Volleyball Rio de JaneiroBrazil Veiga de Almeida University Rio de JaneiroBrazil Division of Neurosurgery University of Sao Paulo Medical SchoolSao PauloBrazil Laboratory of Psychophysiology Department of Psychology and PhonoaudiologyUMESPSao PauloBrazil Panic&Respiration Laboratory Institute of PsychiatryFederal University of Rio de JaneiroRio de JaneiroBrazil National Institute of Translational Medicine(INCT-TM) Brazil Anxiety&Depression Laboratory Institute of Psychiatry of Federal University of Rio de Janeiro(IPUB/UFRJ)Rio de JaneiroBrazil Department of Medical Specialities State University of Rio de Janeiro(UERJ)Rio de JaneiroBrazil Laboratory of Molecular Psychiatry Bipolar Disorders Program and INCT Translational MedicineHospital de Clínicas de Porto AlegreUniversidade Federal do Rio Grande do SulPorto AlegreBrazil Biomedical Engineering Program Universidade Federal do Rio de JaneiroRio de JaneiroBrazil Neuromuscular Research Laboratory National Institute of Traumatology and Orthopedics(NITO)Rio de JaneiroBrazil

Objective: The present study aimed to investigate and to compare the electrophysiological changes in bipolar patients and healthy subjects during the execution of a saccade task. Materials and Methods: The subjects had to respond to a fixed visual stimulus presented by a LEDs bar. We executed an ANOVA (one-way) and post hoc Scheffé test to examine the difference of absolute alpha power and reaction time among four groups: control, depression, manic and euthymic. We observed the frontal, parietal and occipital regions. The paired t test was realized on each electrode and group to compare the pre and post moment in the task. Results: We observed a statistical difference among the groups for the behavioral variable—saccade reaction time. For the electrophysiological variable—absolute alpha power, we did not find significant difference between the moments (pre and post stimulus presentation) for none of the electrodes of each bipolar group. However, the results pointed out to a difference between the moments for F3, P3, O1 and O2 electrodes for control group. Conclusion: We cannot affirm that the task influences the cortical activity of the patients. It is possible that the method used to analyze the data is not the adequate. The time-frequency analysis could be better to analyze the present data. We also observed that the absolute alpha power could be considered a marker of bipolar disorder, but not of the different states (i.e., mania, depression, euthymia).

关键词： Sensorimotor Integration Saccadic Movement Attention Bipolar Disease and Electroencephalography

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