Strenge H, Kropp P, Hoffmeister J, Verri A, Galli C, Gerber W D
Institute of Medical Psychology, Center of Nervous Diseases, University Kiel, Germany.
Neurosci Lett. 1999 Apr 30;266(1):57-60. doi: 10.1016/s0304-3940(99)00261-x.
The contingent negative variation (CNV) as a slow cortical potential was used to investigate cortical processing of externally cued, voluntary unilateral eye blink. Probands blinked as a response within a modified two-stimulus reaction time paradigm. Reaction time and amplitudes of CNV were determined. The activity of the orbicularis oculi muscles (OO) was registered by surface electromyography (EMG). Probands who performed unilateral eye blinks with accurately inhibiting contralateral OO activity showed a significantly higher negativity of the early CNV component compared with the bilateral eye blink condition. This effect was confined to the beginning of unilateral blinking performance. It is suggested that the unilateral eye blink is a challenging motor task, initially requiring an increased cortically driven arousal and attention as revealed by increased early CNV components.
作为一种慢皮层电位的伴随负变化（CNV）被用于研究外部线索提示的、自主单侧眨眼的皮层加工过程。先证者在改良的双刺激反应时范式中作为反应进行眨眼。测定了反应时和CNV的振幅。眼轮匝肌（OO）的活动通过表面肌电图（EMG）记录。与双侧眨眼条件相比，能够精准抑制对侧OO活动而进行单侧眨眼的先证者，其早期CNV成分的负性明显更高。这种效应局限于单侧眨眼表现开始时。这表明单侧眨眼是一项具有挑战性的运动任务，如早期CNV成分增加所显示的那样，最初需要增强皮层驱动的觉醒和注意力。
