Babiloni Claudio, Babiloni Fabio, Carducci Filippo, Cincotti Febo, Vecchio Fabrizio, Cola Benedetta, Rossi Simone, Miniussi Carlo, Rossini Paolo Maria
Dipartimento di Fisiologia Umana e Farmacologia, Università degli Studi di Roma "La Sapienza', Rome, Italy.
Behav Neurosci. 2004 Aug;118(4):687-97. doi: 10.1037/0735-7044.118.4.687.
In this electroencephalographic study, the authors modeled the functional connectivity between frontal and parietal areas during short-term memory (STM) processes by spectral coherence analysis and the directed transfer function, that is, for the estimation of coherence "direction." A no-STM task was used as a reference. STM was characterized by an increased frontoparietal electroencephalograph coherence at high frequencies (beta and gamma, 14-45 Hz). In the control task, parietal-to-frontal flow prevailed at those frequencies. However, the STM task showed a bidirectional frontoparietal flow at the gamma band. In conclusion, frontoparietal connectivity would optimize "representational" memory during STM. In this context, the frontal areas would increase their influence on parietal areas for memory retention.
