Abstract
The study examines the occurrence of alpha activity and their intracerebral sources in sLORETA imaging during Chinese health exercise. The experiment was conducted with five participants (three male and two females 27-52) who carried out simple, repetitive, symmetrical movements with their upper limbs.
The duration of the exercise was 10 minutes with open eyes and 10 minutes with closed eyes. The 19-channel EEG was recorded from the scalp using the telemetric Nicolet Wireless Amplifier (Natus Neurology Inc.) by 19 electrodes before, during the exercise with open and close eyes, and after the exercise.
Obtained signal was later on processed by sLORETA program and statistically important difference in intracerebral brain activity for alfa-1 and alfa-2 zone was registered. The data were then evaluated in the sLORETA software including statistical processing with the t-test.
The results show that alpha activity is present not only in relaxed states with closed eyes but as well during slow motions in standing positions. Alpha activity has occurred in four out of five subjects during the exercise with closed eyes, and in three out of five subjects during the exercise with open eyes.
During the exercise with closed eyes, alpha activity has been registered in primary and secondary visual centers, similar to initial and final resting EEG recording. Conclusions of this pilot study signify that during concentric exercise with closed eyes can slow, repetitive movements generate Alfa activity and by that evoke state of brain relaxation which is important for optimal brain functioning Simultaneously it brings one of possible methods of evaluating intracerebral brain activity sources during physical action which can be applied for research purposes during nearly all physical activities.