Do specific EEG frequencies indicate different processes during mental calculation?
Por:
Harmony T., Fernández T., Silva J., Bosch J., Valdés P., Fernández-Bouzas A., Galán L., Aubert E., Rodríguez D.
Publicada:
1 ene 1999
Resumen:
EEG recordings during mental calculation and a control task (with presentation of stimuli with similar physical characteristics to the arithmetic symbols) were obtained in 10 subjects. Narrow band analyses of the EEG and distributed sources for each EEG frequency were calculated using variable resolution electromagnetic tomography. Significant differences between the sources for arithmetic and control tasks were observed at 3.9 HZ within Broca's and left parietotemporal cortices, suggesting that this frequency may be related with the production of internal speech, storage and rehearsal of verbal working memory. Differences at 5.46 Hz within the right dorsolateral prefrontal cortex were considered to be associated to sustained attention. The decrease at 12.46 Hz within the left parietal-cortex was interpreted as a sign of retrieval of arithmetic facts from long term memory.
Filiaciones:
Harmony T.:
Centro de Neurobiología, Campus UNAM Juriquilla, Qro 76001, Querétaro, Mexico
Fernández T.:
ENEP Iztacala UNAM, Los Reyes, Tlanepantla, Estado de Mexico, Mexico
Silva J.:
Centro de Neurobiología, Campus UNAM Juriquilla, Qro 76001, Querétaro, Mexico
Bosch J.:
Centro de Neurociencias de Cuba, Playa, La Habana, Cuba
Valdés P.:
Centro de Neurociencias de Cuba, Playa, La Habana, Cuba
Fernández-Bouzas A.:
ENEP Iztacala UNAM, Los Reyes, Tlanepantla, Estado de Mexico, Mexico
Galán L.:
Centro de Neurociencias de Cuba, Playa, La Habana, Cuba
Aubert E.:
Centro de Neurociencias de Cuba, Playa, La Habana, Cuba
Rodríguez D.:
Centro de Neurobiología, Campus UNAM Juriquilla, Qro 76001, Querétaro, Mexico
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