Adaptive changes in the neuromagnetic response of the primary and association somatosensory areas following repetitive tactile hand stimulation in humans.

Human Brain Mapping
Elena Anda PopescuMihai Popescu

Abstract

Cortical adaptation in the primary somatosensory cortex (SI) has been probed using different stimulation modalities and recording techniques, in both human and animal studies. In contrast, considerably less knowledge has been gained about the adaptation profiles in other areas of the cortical somatosensory network. Using magnetoencephalography (MEG), we examined the patterns of short-term adaptation for evoked responses in SI and somatosensory association areas during tactile stimulation applied to the glabrous skin of the hand. Cutaneous stimuli were delivered as trains of serial pulses with a constant frequency of 2 Hz and 4 Hz in separate runs, and a constant inter-train interval of 5 s. The unilateral stimuli elicited transient responses to the serial pulses in the train, with several response components that were separated by independent component analysis. Subsequent source reconstruction techniques identified regional generators in the contralateral SI and somatosensory association areas in the posterior parietal cortex (PPC). Activity in the bilateral secondary somatosensory cortex (i.e., SII/PV) was also identified, although less consistently across subjects. The dynamics of the evoked activity in each area and the fre...Continue Reading

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Citations

Jul 26, 2014·Experimental Brain Research·Lalit VenkatesanAnda Popescu
Jun 18, 2016·Frontiers in Human Neuroscience·Gilles NaeijeXavier De Tiège
Oct 31, 2015·BMC Neuroscience·Yoon Gi ChungSung-Phil Kim
Mar 27, 2020·Frontiers in Neuroscience·Yingying WangSteven M Barlow

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