The effect of alertness and attention on the modulation of the beta rhythm to tactile stimulation
Illman, M., Laaksonen, K., Liljeström, M., Piitulainen, H., & Forss, N. (2021). The effect of alertness and attention on the modulation of the beta rhythm to tactile stimulation. Physiological Reports, 9(12), Article e14818. https://doi.org/10.14814/phy2.14818
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Physiological ReportsDate
2021Discipline
BiomekaniikkaMonitieteinen aivotutkimuskeskusHyvinvoinnin tutkimuksen yhteisöBiomechanicsCentre for Interdisciplinary Brain ResearchSchool of WellbeingCopyright
© 2021 The Authors. Physiological Reports published by Wiley Periodicals LLC on behalf of The Physiological Society and the American Physiological Society
Beta rhythm modulation has been used as a biomarker to reflect the functional state of the sensorimotor cortex in both healthy subjects and patients. Here, the effect of reduced alertness and active attention to the stimulus on beta rhythm modulation was investigated. Beta rhythm modulation to tactile stimulation of the index finger was recorded simultaneously with MEG and EEG in 23 healthy subjects (mean 23, range 19–35 years). The temporal spectral evolution method was used to obtain the peak amplitudes of beta suppression and rebound in three different conditions (neutral, snooze, and attention). Neither snooze nor attention to the stimulus affected significantly the strength of beta suppression nor rebound, although a decrease in suppression and rebound strength was observed in some subjects with a more pronounced decrease of alertness. The reduction of alertness correlated with the decrease of suppression strength both in MEG (left hemisphere r = 0.49; right hemisphere r = 0.49, *p < 0.05) and EEG (left hemisphere r = 0.43; right hemisphere r = 0.72, **p < 0.01). The results indicate that primary sensorimotor cortex beta suppression and rebound are not sensitive to slightly reduced alertness nor active attention to the stimulus at a group level. Hence, tactile stimulus-induced beta modulation is a suitable tool for assessing the sensorimotor cortex function at a group level. However, subjects’ alertness should be maintained high during recordings to minimize individual variability.
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John Wiley & SonsISSN Search the Publication Forum
2051-817XKeywords
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https://converis.jyu.fi/converis/portal/detail/Publication/97948292
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Research Council of FinlandFunding program(s)
Academy Research Fellow, AoF; Research costs of Academy Research Fellow, AoFAdditional information about funding
This work was supported by the SalWe Research Program for Mind and Body, Tekes – the Finnish Funding Agency for Technology and Innovation [grant number 1104/10]; Academy of Finland [grant numbers 296240, 307250, 326988, 327288]; Aalto NeuroImaging, Aalto Brain Centre and Jane and Aatos Erkko Foundation.License
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