EEG BIOFEEDBACK OF INTERHEMISPHERIC CORRE LATION IN HUMANS - SESSIONSONE WEEK APART

It has been previously described in the literature that it is possible to increase the interhemispheric correlation (IC) of the EEG of human subjects through feedback training. These variations are statisticall y significantin relation to the control situation. However, it is not known how the outcome of the training is affected by the time that has elapsed between sessions. An experiment was designed to answer this q uestion. The sessions were held weekly instead of the twice a week par adigm utilized in the former experiment. The IC of eleven neurological ly healthy subjects, ages ranging from 21 to 50, was measured during a first block of six sessions. Thereafter, the group was divided into t wo groups, one continued as a control group while the other was subjec ted to biofeedback training. This second block lasted 10 weeks. Once t he training was over, it was observed that the control group had no st atistically significant increases in its IC values (t = 0.179, p(t) = 0.8653), neither had the experimental group (t = -0.653, p(t) = 0.5493 ). This leads to the conclusion that the time elapsed between biofeedb ack training sessions does have a significant effect on the learning p rocess in terms of increased IC values. It is worthwhile mentioning th at the IC of both groups showed a similar cyclical pattern lasting 5 w eeks, however this phenomenon was not significant.