Changes of electrical brain activity during the stimulation of thoracic trigger zone by Vojta's principle concept
Abstract
Aim of the work is to compare the changes of source intracerebral activity in sLORETA image during the manual stimulation of thoracic trigger zone by the concept of Vojta's therapy. Electrical brain activity was registered via surface EEG.
Obtained data was subsequently processed in sLORETA programme. Methods: 11 healthy women aged 20 - 45 years old participated on the research.
EEG activity was registered before the stimulation for 5 minutes at rest with closed eyes (PRE CE) and 5 minutes at rest with eyes opened (PRE OE), subsequently the electrical activity for 15 minutes during the trigger zone stimulation was monitored; with eyes opened (VOJTA OE) and for 15 minutes with closed eyes (VOJTA CE). The experiment was completed by the rest EEG record registration with closed eyes after stimulation of the trigger zone in 1. - 5. minute (POST CE 1) and in 10. - 15. minute (POST CE 2) and the rest record with opened eyes after stimulation of the trigger zone in 1. - 5. minute (POST OE 1) and in 10. - 15. minute (POST OE 2).
Registered data was subsequently mathematically processed in sLORETA programme and all parts of experiment were mutually statistically compared via paired t-test with logarithmic data transformation with obliteration parameter 0.8 using permutation method employing 5000 randomization on significance level p a 0.10, with correlation for repeated testing. Statistically significant difference in Brodmann areas at rest before the stimulation, during the stimulation and up to 20 minutes after finished stimulation of the trigger zones for each frequency range of EEG signal was assessed.
Results: Statistically significant differences were found in 2 situations: 1. between the rest state with closed eyes in 1. - 5. minute after the termination of trigger zone stimulation (POST CE 1) and rest state with closed eyes before the trigger zone stimulation (PRE CE) in the frequency range alpha-2, significance level p d'' 0.10, for Brodmann zones 6 and 10 and on significance level p a 0.05 for Brodmann zones 17, 18, 19, 30 and 37. 2. between the state with eyes opened during the stimulation of the zones and rest state before the stimulation with eyes opened in the frequency range alpha-2, significance level p a 0.10 for Brodmann zones 7, 9, 10 and on significance level p a 0.05 for Brodmann zones 17, 18, 19, 24, 25, 29, 30 and 32. Conclusions: We pointed out statistically significant changes between the rest state before the stimulation, during the stimulation and in first 5 minutes after finished stimulation of trigger zone in sensimotor, occipital and limbic areas in alpha-2 zone.
These findings suggest the possible effect of trigger point stimulation on brain activity.