Biofeedback-produced hemispheric asymmetry of slow cortical potentials and its behavioural effects
作者： Brigitte Rockstroh , Thomas Elbert , Niels Birbaumer , Werner Lutzenberger
DOI: 10.1016/0167-8760(90)90069-P
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摘要: Abstract Two studies served to examine behavioural effects of slow cortical potentials (SPs). SPs were manipulated by means a biofeedback procedure. The ability human subjects alter differentially between the two hemispheres - specifically over lateral aspects teh central sulcus was tested providing feedback ofthe SP difference betwrrn C3 and C4. In Expt. I, 21 45 produced hemispheric asymmetries more than 2 μV C4 on an average after 80 trials analogue, continuous immediate feedback. II, changes fed back digitally at end each trial. Within 120 trials, 20 48 reached criterion minimum 2-μV in average. Average differentiation remained significantly below differentiations achieved for Trials with followed ‘task’ without feedback, during which still requested produce but also had complete task: Either sensorimotor tasks (Expt. I) or forced choice handedness II) presented evaluate consequences differences. achieving required it affected output agreement known functions respective area.
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