EEG spectral coherence inter- and intrahemispheric during catching object fall task.

The aim of the present study was to evaluate coherence measures at Theta through qEEG during the accomplishment of a specific motor task. The sample consisted of 23 healthy individuals, both sexes, with ages varying between 25 and 40 years old. All subjects were submitted to a specific motor task of catching sequences of falling balls. A three-way ANOVA was employed for the statistical analysis, which demonstrated main effects for the following factors: time, block and position. However, there was no interaction between the factors. A significant and generalized coherence reduction was observed during the task execution time. Coherence was also diminished at the left frontal cortex and contralateral hemisphere of the utilizing limb (comparing to the right frontal cortex). In conclusion, these findings suggest a certain specialization of the neural circuit, also according to previous investigations. The inter-coherence reduction suggests a spatial inter-electrode dependence during the task, rather than a neuronal specialization.

[1]  R. Barry,et al.  EEG coherence adjusted for inter-electrode distance in children with attention-deficit/hyperactivity disorder. , 2005, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.

[2]  A. E. Schulman,et al.  Functional coupling of human cortical sensorimotor areas during bimanual skill acquisition. , 1999, Brain : a journal of neurology.

[3]  C. Stam,et al.  Variability of EEG synchronization prior to and during observation and execution of a sequential finger movement , 2006, Human brain mapping.

[4]  Bradley D. Hatfield,et al.  Electroencephalography and Mental States Associated with Elite Performance , 1998 .

[5]  R. C. Oldfield.  The assessment and analysis of handedness: the Edinburgh inventory. , 1971, Neuropsychologia.

[6]  Aprendizagem de procedimentos e efeitos ansiolíticos: medidas eletrencefalográficas, motora e atencional , 2006 .

[7]  de Carvalho-Machado Se,et al.  Modificaciones en la distribución de potencia en función de la consolidación de la memoria implícita mediante una tarea de dactilografía , 2005 .

[8]  Maurício Cagy,et al.  Medidas eletrencefalográficas durante a aprendizagem de tarefa motora sob efeito do bromazepam , 2005 .

[9]  R. Nargeot,et al.  Voltage-Dependent Switching of Sensorimotor Integration by a Lobster Central Pattern Generator , 2003, The Journal of Neuroscience.

[10]  L. McEvoy,et al.  Neurophysiological indices of strategy development and skill acquisition. , 1999, Brain research. Cognitive brain research.

[11]  Alexander Thiel,et al.  Neuroimaging-guided rTMS of the left inferior frontal gyrus interferes with repetition priming , 2005, NeuroImage.

[12]  S. Kawahara,et al.  NMDA receptor-dependent processes in the medial prefrontal cortex are important for acquisition and the early stage of consolidation during trace, but not delay eyeblink conditioning. , 2005, Learning & memory.

[13]  H. P. Zaveri,et al.  Coherence of the electroencephalogram during the first sleep cycle , 2005, Clinical Neurophysiology.

[14]  P. Roland,et al.  Supplementary motor area and other cortical areas in organization of voluntary movements in man. , 1980, Journal of neurophysiology.

[15]  Paulo Caramelli,et al.  Estudo da coerência do eletrencefalograma na banda de frequência alfa em indivíduos adultos normais: resultados preliminares em 10 casos , 2005 .

[16]  H. Jasper,et al.  The ten-twenty electrode system of the International Federation. The International Federation of Clinical Neurophysiology. , 1999, Electroencephalography and clinical neurophysiology. Supplement.

[17]  Boreom Lee,et al.  Activity of left inferior frontal gyrus related to word repetition effects: LORETA imaging with 128-channel EEG and individual MRI , 2006, NeuroImage.

[18]  Maurício Cagy,et al.  Efeitos do Bromazepam observados pela eletroencefalografia quantitativa (EEGq) durante a prática de datilografia , 2005 .

[19]  F. Lacquaniti,et al.  Adaptation to suppression of visual information during catching , 1989, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[20]  Leslie G. Ungerleider,et al.  The acquisition of skilled motor performance: fast and slow experience-driven changes in primary motor cortex. , 1998, Proceedings of the National Academy of Sciences of the United States of America.

[21]  Leslie G. Ungerleider,et al.  Imaging Brain Plasticity during Motor Skill Learning , 2002, Neurobiology of Learning and Memory.

[22]  Robert J. Barry,et al.  Age and gender effects in EEG coherence: II. Boys with attention deficit/hyperactivity disorder , 2005, Clinical Neurophysiology.