The intervention of mechanical tactile stimulation modulates somatosensory evoked magnetic fields and cortical oscillations
The intervention of mechanical tactile stimulation modulates somatosensory evoked magnetic fields and cortical oscillations
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DOI：
10.1111/ejn.15209
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发表时间：
2021-03
影响因子：
3.4
通讯作者：
S. Kojima;N. Otsuru;S. Miyaguchi;Hirotake Yokota;K. Nagasaka;Kei Saito;Yasuto Inukai;H. Shirozu;H. Onishi
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文献类型：
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作者：
S. Kojima;N. Otsuru;S. Miyaguchi;Hirotake Yokota;K. Nagasaka;Kei Saito;Yasuto Inukai;H. Shirozu;H. Onishi
机械触觉刺激引起的不同皮层活动取决于触觉刺激模式，这表明简单刺激（即刺激区域的全局同步刺激）仅激活初级体感皮层，而复杂刺激（即在刺激区域移动时的刺激）不仅激活初级体感皮层，而且还激活初级运动区。在这里，我们研究了重复机械触觉刺激 (MS) 对体感诱发磁场 (SEF) 和皮质振荡的影响是否取决于 MS 模式。这项单盲研究包括 15 名健康参与者。使用持续20分钟的两种类型的MS干预：重复全局触觉刺激（RGS）通过安装在指垫上的24个针来刺激手指，而顺序逐步位移触觉刺激（SSDS）通过在指垫的左右两侧之间移动一排六个针来刺激手指。每个参数均在干预前和干预后进行测量。 RGS 增加了 SEF 的 P50m 幅度，SSDS 降低了 SEF 的 P50m 幅度。 P50m 的调制与其 RGS 前的振幅以及 SSDS 后静息状态下 β 带振荡的调制相关。这项研究表明，20 分钟的 MS 对 SEF 和皮质振荡的影响取决于机械触觉刺激模式。此外，我们的结果为根据皮质状态调节触觉功能和选择刺激模式提供了潜力。
The different cortical activity evoked by a mechanical tactile stimulus depends on tactile stimulus patterns, which demonstrates that simple stimuli (i.e., global synchronous stimulation the stimulus area) activate the primary somatosensory cortex alone, whereas complex stimuli (i.e., stimulation while moving in the stimulus area) activate not only the primary somatosensory cortex but also the primary motor area. Here, we investigated whether the effects of a repetitive mechanical tactile stimulation (MS) on somatosensory evoked magnetic fields (SEFs) and cortical oscillations depend on MS patterns. This single‐blinded study included 15 healthy participants. Two types interventions of MS lasting 20 min were used: a repetitive global tactile stimulation (RGS) was used to stimulate the finger by using 24 pins installed on a finger pad, whereas a sequential stepwise displacement tactile stimulation (SSDS) was used to stimulate the finger by moving a row of six pins between the left and right sides on the finger pad. Each parameter was measured pre‐ and post‐intervention. The P50m amplitude of the SEF was increased by RGS and decreased by SSDS. The modulation of P50m was correlated with its amplitude before RGS and with the modulation of beta band oscillation at the resting state after SSDS. This study showed that the effects of a 20‐min MS on SEFs and cortical oscillations depend on mechanical tactile stimulus patterns. Moreover, our results offer potential for the modulation of tactile functions and selection of stimulation patterns according to cortical states.