A putative marker of functional state shift in volunteers after performing a motor task with biofeedback

Abstract

Statistically significant differences in the stabilometric parameter, an index associated with physical estimation of work, were detected in 13 healthy young volunteers assuming a vertical posture with the eyes closed before and after performing a motor task (a 3-min session of support reaction control with biofeedback). An increase in posture stability after the procedure was accompanied by changes in the power distribution of EEG signals (in the 8–13 Hz range) recorded on the surface of the scalp. The observed effect consisting in an increased postural stability can be interpreted as a “rapid response” to performing a motor task; therefore, it offers the possibility of using a relatively simple approach for the monitoring of switching between functional states associated with various motor procedures and tests.