Angelov A, Stomonyakov V, Boev M, Silyamova V, Minev T, Vladova T
Acta Physiol Pharmacol Bulg. 1981;7(3):55-62.
The connection between the prestimulus slow potential shift (SPS) and the P3-wave of auditory averaged evoked potentials (AEP) from Fz and Cz is studied upon changing the probability and signal characteristics of the stimuli. It has been found that while the changes in the P3-wave, depending on the character of the experimental tasks, are unidirectional for all subjects studied in both recordings and repeat our earlier results, the changes in SPS have different directions. The same changes in P3 are accompanied in some cases by a slightly expressed negativization, in other cases by a certain positivization and in a third group of cases by lack of SPS. The results obtained show that the observed changed in the P3-wave under the conditions of our experiments are not connected with pre-stimulus SPS of the CNV type, being generated in the central nervous system irrespectively of them. They support our hypothesis that the P3-wave is connected with the processes of probability prediction in the brain functioning.
通过改变刺激的概率和信号特征，研究了刺激前慢电位偏移（SPS）与Fz和Cz处听觉平均诱发电位（AEP）的P3波之间的联系。研究发现，虽然P3波的变化取决于实验任务的性质，在两种记录中所研究的所有受试者中都是单向的，并且重复了我们之前的结果，但SPS的变化具有不同的方向。P3波的相同变化在某些情况下伴随着轻微的负向变化，在其他情况下伴随着一定的正向变化，而在第三组情况下则没有SPS。所得结果表明，在我们的实验条件下观察到的P3波变化与CNV类型的刺激前SPS无关，它们是在中枢神经系统中独立产生的。这些结果支持了我们的假设，即P3波与大脑功能中的概率预测过程有关。
