Modulation of tactile detection threshold with rhythmic somatosensory entrainment

作者: Michel J. Wälti , Marc Bächinger , Nicole Wenderoth

DOI: 10.1101/695692

关键词: Sensory systemNeurosciencePerceptionStimulus (physiology)Sensory stimulation therapyChemistryTranscranial alternating current stimulationEntrainment (chronobiology)Somatosensory systemStimulation

摘要: Ongoing neural activity in human somatosensory cortex has a strong impact on the detectability of weak tactile stimuli. Recent studies suggest that brain oscillations, which determine state excitability cortical area, play crucial role this process. Mainly two frequency bands have been reported to be involved conscious sensory perception: alpha (8-12 Hz) and beta (15-30 Hz). In addition correlative findings, more recent investigated causality by measuring extent directly modulating oscillations affects perception. While most these use transcranial alternating current stimulation (tACS), rhythmic suggested as simple safe alternative entrain ongoing activity. However, convincing findings demonstrating modulation signals related behavioral function are scarce. Here, we whether rhythmically induced means vibrotactile (i.e. entrainment) modulate detection. line with previous show trials without entrainment preceding power phase-angles predict detection rate stimulus. Further, reveal masking effect resulting higher perception thresholds. Intriguingly, find is modulated strength from 20 Hz stimulation. Our data provide evidence for possibility processing light effects, feasibility method behavior remains questionable.

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