Kaneko K, Mito K, Makabe H, Takanokura M, Sakamoto K
Cognitive Science Laboratory, Department of Industrial Engineering and Management, Fuji University, Japan.
Electromyogr Clin Neurophysiol. 2004 Dec;44(8):455-62.
Movement-related cortical potentials (MRCPs) associated with the contraction of m. orbicularis oculi related to three types of blinks (voluntary, reflex, and spontaneous) were measured for 12 normal subjects. The purpose of the present study was to estimate the role of the cerebral cortex in close association with the blinks caused by bilateral simultaneous eyelid movements. MRCPs were recorded by surface electrodes placed over the frontal to the parietal regions. The mean amplitude and the duration of the MRCPs for the three types of blinks were evaluated by an averaging technique for each subject. MRCPs for the voluntary blinks were evoked in all subjects. For the reflex and the spontaneous blinks, however, a clear negative rising deflection from the baseline was not obtained. The maximum amplitude of the MRCPs for the voluntary blinks was localized at the vertex region, though there was no significant difference between the durations of the MRCPs for the vertex region and for the other regions. Moreover, the positive potential following the voluntary and the spontaneous blinks was recognized in the parietal region. These results suggest that only the voluntary blinks are caused by the neural activation of the supplementary motor area (SMA), and in addition, the neural activation related to visual recognition is considered to be elicited by the voluntary and the spontaneous blinks.
对12名正常受试者测量了与眼轮匝肌收缩相关的三种眨眼类型（随意性、反射性和自发性）的运动相关皮层电位（MRCPs）。本研究的目的是评估大脑皮层在与双侧同时眼睑运动引起的眨眼密切相关中的作用。MRCPs通过放置在额部至顶叶区域的表面电极进行记录。通过平均技术对每个受试者评估三种眨眼类型的MRCPs的平均幅度和持续时间。所有受试者均诱发了随意性眨眼的MRCPs。然而，对于反射性和自发性眨眼，未获得从基线开始的明显负向上升偏转。随意性眨眼的MRCPs的最大幅度位于头顶区域，尽管头顶区域和其他区域的MRCPs持续时间之间没有显著差异。此外，在顶叶区域识别出了随意性和自发性眨眼后的正电位。这些结果表明，只有随意性眨眼是由辅助运动区（SMA）的神经激活引起的，此外，与视觉识别相关的神经激活被认为是由随意性和自发性眨眼引发的。
