The effect of alertness and attention on the modulation of the beta rhythm to tactile stimulation

Illman, Mia; Laaksonen, Kristina; Liljeström, Mia; Piitulainen, Harri; Forss, Nina

doi:10.14814/phy2.14818

Cited by 7 publications

(12 citation statements)

References 79 publications

(73 reference statements)

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“…Thus, Ilman et al, 2021 suggested that alertness level has an effect on the sensorimotor β -desynchronization during tactile stimulation. Yet, the effects they observed were not statistically significant at the group level [57].…”

Section: Discussionmentioning

confidence: 99%

“…was statistically insignificant). βoscillations have been linked to the activity of the primary motor cortex activity as it is well known that somatosensory inputs modulate β oscillations because of motor-cortical mechanisms [56][57][58]. These effects are driven by the ascending projections to M1 [59,60] and by corticocortical connections with the somatosensory cortex [61].…”

Section: Sensorimotor Erd During Tactile Stimulation and Tactile Imagerymentioning

confidence: 99%

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Event-Related Desynchronization induced by Tactile Imagery: an EEG Study

Yakovlev

Syrov

Miroshnikov

et al. 2022

Preprint

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It is well known that both the movement of the hand itself and the mental representation of it lead to event-related desynchronization (ERD) of EEG recorded over the corresponding motor areas of the cerebral cortex. Similarly, in somatosensory cortical areas, ERD occurs upon tactile stimulation of the hand, but whether this effect is caused by mental representation of sensations from tactile stimulation remains poorly understood. In the present study, the effects on the EEG of imaginary vibrotactile sensations on the right hand were compared with the effects of real vibrotactile stimulation. Both actual vibrotactile stimulation and mental representation of it have been found to elicit contralateral ERD patterns, particularly prominent in the μ-band and most pronounced in the C3 region. The paper discusses tactile imagery as a part of the complex sensorimotor mental image and its prospects for using EEG patterns of imagery-induced tactile sensations as control signals in BCI circuits independently and when combined with ERD based on movement imagination to improve the efficiency of neurointerface technologies in rehabilitation medicine, in particular, to restore movements after a stroke and neurotrauma.

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Section: Discussionmentioning

confidence: 99%

Section: Sensorimotor Erd During Tactile Stimulation and Tactile Imagerymentioning

confidence: 99%

Event-Related Desynchronization induced by Tactile Imagery: an EEG Study

Yakovlev

Syrov

Miroshnikov

et al. 2022

Preprint

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“…Mental fatigue caused by long-lasting attentive task and overload has been shown to enhance the beta power ( 68 ), whereas reduced alertness, for example, due to sleepiness decreases the beta power and the amplitude of beta suppression and rebound ( 43 ). Enhanced vigilance and active attention to stimuli have also been shown to increase the beta power ( 69 , 70 ), and either to increase ( 70 , 71 ) or decrease ( 72 ) the intensity of beta suppression and rebound.…”

Section: Discussionmentioning

confidence: 99%

“…The temporal spectral evolution (TSE) method was used to quantify the strength of the stimulus-related beta rhythm modulation in the follow-up measurements ( 7 ). MEG and EEG data were first filtered to a 13- to 25-Hz frequency band (a symmetric linear-phase FIR filter with a transition band of 1 Hz at the low- and high cutoff frequency and Hamming window, filter length 3.3), which in a previous study has been found to show the strongest beta rhythm modulation for all subjects ( 43 ). The lower beta frequencies are needed specifically to detect the beta rebound ( 5 , 29 , 44 ).…”

Section: Methodsmentioning

confidence: 99%

Reproducibility of Rolandic beta rhythm modulation in MEG and EEG

Illman

Laaksonen

Jousmäki

et al. 2022

Journal of Neurophysiology

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The Rolandic beta rhythm, at ~20 Hz, is generated in the somatosensory and motor cortices and is modulated by motor activity and sensory stimuli, causing a short lasting suppression that is followed by a rebound of the beta rhythm. The rebound reflects inhibitory changes in the primary sensorimotor (SMI) cortex, and thus it has been used as a biomarker to follow the recovery of acute stroke patients. The longitudinal stability of beta rhythm modulation is a prerequisite for its use in long-term follow-ups. We quantified the reproducibility of beta rhythm modulation in healthy subjects in a 1-year-longitudinal study both for MEG and EEG at T0, one month (T1-month, n = 8) and one year (T1-year, n = 19). The beta rhythm (13-25 Hz) was modulated by fixed tactile and proprioceptive stimulations of the index fingers. The relative peak strengths of beta suppression and rebound did not differ significantly between the sessions, and inter-session reproducibility was good or excellent according to intraclass correlation-coefficient values (0.70-0.96) both in MEG and EEG. Our results indicate that the beta rhythm modulation to tactile and proprioceptive stimulation is well reproducible within one year. These results support the use of beta modulation as a biomarker in long-term follow-up studies, e.g., to quantify the functional state of the SMI cortex during rehabilitation and drug interventions in various neurological impairments.

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“…However, some caution is suggested when individual subjects are examined. While beta suppression and rebound in the SM1 are not sensitive to slightly reduced alertness or active attention at group level, they should be maintained high to reduce individual variability (Illman et al, 2021).…”

Section: Tablementioning

confidence: 99%