Objective: We investigated whether a very simple short-term memory (STM) demand induces a visible change of EEG rhythms over the two hemispheres. Methods: High-resolution EEG was obtained in young adults during two delayed choice reaction time tasks. In the STM condition, a simple cue stimulus (one bit) was memorized along a brief delay period (3.5-5.5 s). The task was visuo-spatial in nature. Results: In the control (NSTM) condition, the cue stimulus remained available along the delay period. Compared to the control condition, the theta power (4-6 Hz) decreased in left frontal and bilateral parietal areas (delay period). Furthermore, low alpha power (6-8 Hz) decreased in bilateral frontal and left parietal areas, while high alpha power (10-12 Hz) decreased in the left fronto-parietal areas. Conclusions: The decrease of the alpha power is as an expression of the efficient information transfer within thalamo-cortical pathways. The significance of the study stands in the fact that even a very simple STM task (only one bit to be memorized) revealed changes in fronto-parietal theta and alpha rhythms.

Babiloni, C., Babiloni, F., Carducci, F., Cappa, S.F., Cincotti, F., Del Percio, C., et al. (2004). Human cortical responses during one-bit short-term memory. A high-resolution EEG study on delayed choice reaction time tasks. CLINICAL NEUROPHYSIOLOGY, 115(1), 161-170 [10.1016/S1388-2457(03)00286-4].

Human cortical responses during one-bit short-term memory. A high-resolution EEG study on delayed choice reaction time tasks

ROSSI, SIMONE;
2004-01-01

Abstract

Objective: We investigated whether a very simple short-term memory (STM) demand induces a visible change of EEG rhythms over the two hemispheres. Methods: High-resolution EEG was obtained in young adults during two delayed choice reaction time tasks. In the STM condition, a simple cue stimulus (one bit) was memorized along a brief delay period (3.5-5.5 s). The task was visuo-spatial in nature. Results: In the control (NSTM) condition, the cue stimulus remained available along the delay period. Compared to the control condition, the theta power (4-6 Hz) decreased in left frontal and bilateral parietal areas (delay period). Furthermore, low alpha power (6-8 Hz) decreased in bilateral frontal and left parietal areas, while high alpha power (10-12 Hz) decreased in the left fronto-parietal areas. Conclusions: The decrease of the alpha power is as an expression of the efficient information transfer within thalamo-cortical pathways. The significance of the study stands in the fact that even a very simple STM task (only one bit to be memorized) revealed changes in fronto-parietal theta and alpha rhythms.
2004
Babiloni, C., Babiloni, F., Carducci, F., Cappa, S.F., Cincotti, F., Del Percio, C., et al. (2004). Human cortical responses during one-bit short-term memory. A high-resolution EEG study on delayed choice reaction time tasks. CLINICAL NEUROPHYSIOLOGY, 115(1), 161-170 [10.1016/S1388-2457(03)00286-4].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1000095
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