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  • Title: Expectancy of pain is influenced by motor preparation: a high-resolution EEG study of cortical alpha rhythms.
    Author: Babiloni C, Brancucci A, Capotosto P, Arendt-Nielsen L, Chen AC, Rossini PM.
    Journal: Behav Neurosci; 2005 Apr; 119(2):503-11. PubMed ID: 15839796.
    Abstract:
    This high-resolution electroencephalographic (EEG) study on alpha event-related desynchronization (ERD) evaluated whether anticipatory activity precedes a sensorimotor interaction induced by concomitant painful stimuli and sensorimotor demand. An omitted-stimulus paradigm induced the expectancy of the painful stimulation at the left hand. In the experimental condition, the painful stimulation was associated with a visual go/no-go task triggering right-hand movements. Two control conditions manipulated the painful sensorimotor interaction variable. Compared with the control conditions, the expectancy of the painful sensorimotor interaction increased the high-band alpha EEG oscillations over the right primary sensorimotor cortex contralateral to the nociceptive stimuli and, to a lesser extent, over the centroparietal midline. These findings suggest that concomitant painful stimuli and simple sensorimotor go/no-go demands affect anticipatory activity as revealed by alpha ERD.
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