Birbaumer N, Roberts L E, Lutzenberger W, Rockstroh B, Elbert T
Department of Psychology, University of Tübingen, F.R.G.
Electroencephalogr Clin Neurophysiol. 1992 Jul-Aug;84(4):353-61. doi: 10.1016/0168-5597(92)90088-s.
Exteroceptive feedback was given for negative and positive shifts in slow potentials (SPs) recorded from Fz, Cz, or Pz (between groups design). Slow potentials at the feedback site were referred to adjacent scalp and non-cephalic electrodes, so as to confine SP shifts to the feedback location. Area-specific regulation of SPs was obtained at each midsagittal site after 3 days of feedback training. Subjects reported sensorimotor and emotional arousal when negative SP shifts were trained frontally, but not when negative shifts were trained parietally (cognitive/attentional strategies reported after parietal feedback). Area-specific regulation of SPs was subsequently abolished when behavioral tasks were added to further probe frontal/parietal differences (dual-task procedure). These findings indicate that area-specific self-regulation of SPs is possible on the sagittal midline, and that self-regulated parietal SPs (in contrast to frontal ones) arise from non-motoric generators. The source of SP self-regulation was more readily probed by verbal reports of feedback strategy than by study of dual-task relations, because feedback control was disrupted by the dual-task requirement.
对从Fz、Cz或Pz记录的慢电位（SPs）的正负变化给予外感受性反馈（组间设计）。反馈部位的慢电位参考相邻头皮和非头部电极，以便将SP变化限制在反馈位置。经过3天的反馈训练后，在每个矢状中线部位获得了SPs的区域特异性调节。当在额叶训练负向SP变化时，受试者报告了感觉运动和情绪唤醒，但在顶叶训练负向变化时则没有（顶叶反馈后报告的认知/注意力策略）。当添加行为任务以进一步探究额叶/顶叶差异时（双任务程序），随后SPs的区域特异性调节被消除。这些发现表明，在矢状中线上，SPs的区域特异性自我调节是可能的，并且自我调节的顶叶SPs（与额叶SPs相比）来自非运动发生器。与通过双任务关系研究相比，通过反馈策略的口头报告更容易探究SP自我调节的来源，因为双任务要求会干扰反馈控制。
